Changelog for openssh-server-9.6p1-10.0.4.1.sr20240605.x86_64.rpm :

* Mon Jul 01 2024 Antonio Larrosa - Add patch to fix a race condition in a signal handler by removing the async-signal-unsafe code (CVE-2024-6387, bsc#1226642):
* fix-CVE-2024-6387.patch
* Mon Jun 10 2024 Antonio Larrosa - Add #include in some files added by the ldap patch to fix build with gcc14 (boo#1225904).
* openssh-7.7p1-ldap.patch
* Fri May 17 2024 Antonio Larrosa - Remove the recommendation for openssh-server-config-rootlogin from openssh-server. Since the default for that config option was changed in SLE it\'s not needed anymore in SLE nor in TW (boo#1224392).
* Tue May 14 2024 Antonio Larrosa - Add a warning in %post of openssh-clients, openssh-server and openssh-server-config-disallow-rootlogin to warn the user if the /etc/ssh/(ssh_config.d|sshd_config.d) directories are not being used (bsc#1223486).
* Mon May 13 2024 Antonio Larrosa - Only for SLE15, restore the patch file removed in Thu Feb 18 13:54:44 UTC 2021 to restore the previous behaviour from SP5 of having root password login allowed by default (fixes bsc#1223486, related to bsc#1173067):
* openssh-7.7p1-allow_root_password_login.patch- Since the default value for this config option is now set to permit root to use password logins in SLE15, the openssh-server-config-rootlogin subpackage isn\'t useful there so we now create an openssh-server-config-disallow-rootlogin subpackage that sets the configuration the other way around than openssh-server-config-rootlogin.
* Mon Apr 15 2024 Marcus Meissner - openssh-8.0p1-gssapi-keyex.patch: Added missing struct initializer, added missing parameter (bsc#1222840)
* Fri Apr 12 2024 Antonio Larrosa - Make openssh-server recommend the openssh-server-config-rootlogin package in SLE in order to keep the same behaviour of previous SPs where the PermitRootLogin default was set to yes (bsc#1221005).- Fix crypto-policies requirement to be set by openssh-server, not the config-rootlogin subpackage.- Add back %config(noreplace) tag for more config files that were already set like this in previous SPs.
* Thu Apr 11 2024 Arnav Singh - Fix duplicate loading of dropins. (boo#1222467)
* Fri Apr 05 2024 Antonio Larrosa - Add missing bugzilla/CVE references to the changelog
* Thu Apr 04 2024 Antonio Larrosa - Add patch from SLE which was missing in Factory:
* Mon Jun 7 20:54:09 UTC 2021 - Hans Petter Jansson - Add openssh-mitigate-lingering-secrets.patch (bsc#1186673), which attempts to mitigate instances of secrets lingering in memory after a session exits. (bsc#1213004 bsc#1213008)- Rebase patch:
* openssh-6.6p1-privsep-selinux.patch
* Tue Apr 02 2024 Martin Sirringhaus - Rebase openssh-7.7p1-fips.patch (bsc#1221928) Remove OPENSSL_HAVE_EVPGCM-ifdef, which is no longer supported by upstream
* Tue Apr 02 2024 Antonio Larrosa - Use %config(noreplace) for sshd_config . In any case, it\'s recommended to drop a file in sshd_config.d instead of editing sshd_config (bsc#1221063)- Use %{_libexecdir} when removing ssh-keycat instead of the hardcoded path so it works in TW and SLE.
* Mon Mar 04 2024 Pedro Monreal - Add crypto-policies support [bsc#1211301]
* Add patches: - openssh-9.6p1-crypto-policies.patch - openssh-9.6p1-crypto-policies-man.patch
* Sun Feb 25 2024 Hans Petter Jansson - Update to openssh 9.6p1: = Security
* ssh(1), sshd(8): implement protocol extensions to thwart the so-called \"Terrapin attack\" discovered by Fabian Bäumer, Marcus Brinkmann and Jörg Schwenk. This attack allows a MITM to effect a limited break of the integrity of the early encrypted SSH transport protocol by sending extra messages prior to the commencement of encryption, and deleting an equal number of consecutive messages immediately after encryption starts. A peer SSH client/server would not be able to detect that messages were deleted (bsc#1217950, CVE-2023-48795).
* ssh-agent(1): when adding PKCS#11-hosted private keys while specifying destination constraints, if the PKCS#11 token returned multiple keys then only the first key had the constraints applied. Use of regular private keys, FIDO tokens and unconstrained keys are unaffected.
* ssh(1): if an invalid user or hostname that contained shell metacharacters was passed to ssh(1), and a ProxyCommand, LocalCommand directive or \"match exec\" predicate referenced the user or hostname via %u, %h or similar expansion token, then an attacker who could supply arbitrary user/hostnames to ssh(1) could potentially perform command injection depending on what quoting was present in the user-supplied ssh_config(5) directive. = Potentially incompatible changes
* ssh(1), sshd(8): the RFC4254 connection/channels protocol provides a TCP-like window mechanism that limits the amount of data that can be sent without acceptance from the peer. In cases where this limit was exceeded by a non-conforming peer SSH implementation, ssh(1)/sshd(8) previously discarded the extra data. From OpenSSH 9.6, ssh(1)/sshd(8) will now terminate the connection if a peer exceeds the window limit by more than a small grace factor. This change should have no effect of SSH implementations that follow the specification. = New features
* ssh(1): add a %j token that expands to the configured ProxyJump hostname (or the empty string if this option is not being used) that can be used in a number of ssh_config(5) keywords. bz3610
* ssh(1): add ChannelTimeout support to the client, mirroring the same option in the server and allowing ssh(1) to terminate quiescent channels.
* ssh(1), sshd(8), ssh-add(1), ssh-keygen(1): add support for reading ED25519 private keys in PEM PKCS8 format. Previously only the OpenSSH private key format was supported.
* ssh(1), sshd(8): introduce a protocol extension to allow renegotiation of acceptable signature algorithms for public key authentication after the server has learned the username being used for authentication. This allows varying sshd_config(5) PubkeyAcceptedAlgorithms in a \"Match user\" block.
* ssh-add(1), ssh-agent(1): add an agent protocol extension to allow specifying certificates when loading PKCS#11 keys. This allows the use of certificates backed by PKCS#11 private keys in all OpenSSH tools that support ssh-agent(1). Previously only ssh(1) supported this use-case. = Bugfixes
* ssh(1): when deciding whether to enable the keystroke timing obfuscation, enable it only if a channel with a TTY is active.
* ssh(1): switch mainloop from poll(3) to ppoll(3) and mask signals before checking flags set in signal handler. Avoids potential race condition between signaling ssh to exit and polling. bz3531
* ssh(1): when connecting to a destination with both the AddressFamily and CanonicalizeHostname directives in use, the AddressFamily directive could be ignored. bz5326
* sftp(1): correct handling of the limitsAATTopenssh.com option when the server returned an unexpected message.
* A number of fixes to the PuTTY and Dropbear regress/integration tests.
* ssh(1): release GSS OIDs only at end of authentication, avoiding unnecessary init/cleanup cycles. bz2982
* ssh_config(5): mention \"none\" is a valid argument to IdentityFile in the manual. bz3080
* scp(1): improved debugging for paths from the server rejected for not matching the client\'s glob(3) pattern in old SCP/RCP protocol mode.
* ssh-agent(1): refuse signing operations on destination-constrained keys if a previous session-bind operation has failed. This may prevent a fail-open situation in future if a user uses a mismatched ssh(1) client and ssh-agent(1) where the client supports a key type that the agent does not support.- Update to openssh 9.5p1: = Potentially incompatible changes
* ssh-keygen(1): generate Ed25519 keys by default. Ed25519 public keys are very convenient due to their small size. Ed25519 keys are specified in RFC 8709 and OpenSSH has supported them since version 6.5 (January 2014).
* sshd(8): the Subsystem directive now accurately preserves quoting of subsystem commands and arguments. This may change behaviour for exotic configurations, but the most common subsystem configuration (sftp-server) is unlikely to be affected. = New features
* ssh(1): add keystroke timing obfuscation to the client. This attempts to hide inter-keystroke timings by sending interactive traffic at fixed intervals (default: every 20ms) when there is only a small amount of data being sent. It also sends fake \"chaff\" keystrokes for a random interval after the last real keystroke. These are controlled by a new ssh_config ObscureKeystrokeTiming keyword.
* ssh(1), sshd(8): Introduce a transport-level ping facility. This adds a pair of SSH transport protocol messages SSH2_MSG_PING/PONG to implement a ping capability. These messages use numbers in the \"local extensions\" number space and are advertised using a \"pingAATTopenssh.com\" ext-info message with a string version number of \"0\".
* sshd(8): allow override of Subsystem directives in sshd Match blocks. = Bugfixes
* scp(1): fix scp in SFTP mode recursive upload and download of directories that contain symlinks to other directories. In scp mode, the links would be followed, but in SFTP mode they were not. bz3611
* ssh-keygen(1): handle cr+lf (instead of just cr) line endings in sshsig signature files.
* ssh(1): interactive mode for ControlPersist sessions if they originally requested a tty.
* sshd(8): make PerSourceMaxStartups first-match-wins
* sshd(8): limit artificial login delay to a reasonable maximum (5s) and don\'t delay at all for the \"none\" authentication mechanism. bz3602
* sshd(8): Log errors in kex_exchange_identification() with level verbose instead of error to reduce preauth log spam. All of those get logged with a more generic error message by sshpkt_fatal().
* sshd(8): correct math for ClientAliveInterval that caused the probes to be sent less frequently than configured.
* ssh(1): fix regression in OpenSSH 9.4 (mux.c r1.99) that caused multiplexed sessions to ignore SIGINT under some circumstances.- Update to openssh 9.4p1: = Potentially incompatible changes
* This release removes support for older versions of libcrypto. OpenSSH now requires LibreSSL >= 3.1.0 or OpenSSL >= 1.1.1. Note that these versions are already deprecated by their upstream vendors.
* ssh-agent(1): PKCS#11 modules must now be specified by their full paths. Previously dlopen(3) could search for them in system library directories. = New features
* ssh(1): allow forwarding Unix Domain sockets via ssh -W.
* ssh(1): add support for configuration tags to ssh(1). This adds a ssh_config(5) \"Tag\" directive and corresponding \"Match tag\" predicate that may be used to select blocks of configuration similar to the pf.conf(5) keywords of the same name.
* ssh(1): add a \"match localnetwork\" predicate. This allows matching on the addresses of available network interfaces and may be used to vary the effective client configuration based on network location.
* ssh(1), sshd(8), ssh-keygen(1): infrastructure support for KRL extensions. This defines wire formats for optional KRL extensions and implements parsing of the new submessages. No actual extensions are supported at this point.
* sshd(8): AuthorizedPrincipalsCommand and AuthorizedKeysCommand now accept two additional %-expansion sequences: %D which expands to the routing domain of the connected session and %C which expands to the addresses and port numbers for the source and destination of the connection.
* ssh-keygen(1): increase the default work factor (rounds) for the bcrypt KDF used to derive symmetric encryption keys for passphrase protected key files by 50%. = Bugfixes
* ssh-agent(1): improve isolation between loaded PKCS#11 modules by running separate ssh-pkcs11-helpers for each loaded provider.
* ssh(1): make -f (fork after authentication) work correctly with multiplexed connections, including ControlPersist. bz3589 bz3589
* ssh(1): make ConnectTimeout apply to multiplexing sockets and not just to network connections.
* ssh-agent(1), ssh(1): improve defences against invalid PKCS#11 modules being loaded by checking that the requested module contains the required symbol before loading it.
* sshd(8): fix AuthorizedPrincipalsCommand when AuthorizedKeysCommand appears before it in sshd_config. Since OpenSSH 8.7 the AuthorizedPrincipalsCommand directive was incorrectly ignored in this situation. bz3574
* sshd(8), ssh(1), ssh-keygen(1): remove vestigal support for KRL signatures When the KRL format was originally defined, it included support for signing of KRL objects. However, the code to sign KRLs and verify KRL signatues was never completed in OpenSSH. This release removes the partially-implemented code to verify KRLs. All OpenSSH tools now ignore KRL_SECTION_SIGNATURE sections in KRL files.
* All: fix a number of memory leaks and unreachable/harmless integer overflows.
* ssh-agent(1), ssh(1): don\'t truncate strings logged from PKCS#11 modules; GHPR406
* sshd(8), ssh(1): better validate CASignatureAlgorithms in ssh_config and sshd_config. Previously this directive would accept certificate algorithm names, but these were unusable in practice as OpenSSH does not support CA chains. bz3577
* ssh(1): make `ssh -Q CASignatureAlgorithms` only list signature algorithms that are valid for CA signing. Previous behaviour was to list all signing algorithms, including certificate algorithms.
* ssh-keyscan(1): gracefully handle systems where rlimits or the maximum number of open files is larger than INT_MAX; bz3581
* ssh-keygen(1): fix \"no comment\" not showing on when running `ssh-keygen -l` on multiple keys where one has a comment and other following keys do not. bz3580
* scp(1), sftp(1): adjust ftruncate() logic to handle servers that reorder requests. Previously, if the server reordered requests then the resultant file would be erroneously truncated.
* ssh(1): don\'t incorrectly disable hostname canonicalization when CanonicalizeHostname=yes and ProxyJump was expicitly set to \"none\". bz3567
* scp(1): when copying local->remote, check that the source file exists before opening an SFTP connection to the server. Based on GHPR#370- Dropped patches:
* cb4ed12f.patch - implemented upstream.
* openssh-cve-2023-48795.patch - implemented upstream.- Rebased patches:
* openssh-6.6p1-selinux-contexts.patch
* openssh-7.7p1-fips.patch
* openssh-7.8p1-role-mls.patch
* openssh-8.0p1-gssapi-keyex.patch
* Tue Dec 19 2023 Hans Petter Jansson - Added openssh-cve-2023-48795.patch (bsc#1217950, CVE-2023-48795). This mitigates a prefix truncation attack that could be used to undermine channel security.
* Fri Nov 03 2023 Johannes Segitz - Enhanced SELinux functionality. Added
* openssh-7.8p1-role-mls.patch Proper handling of MLS systems and basis for other SELinux improvements
* openssh-6.6p1-privsep-selinux.patch Properly set contexts during privilege separation
* openssh-6.6p1-keycat.patch Add ssh-keycat command to allow retrival of authorized_keys on MLS setups with polyinstantiation
* openssh-6.6.1p1-selinux-contexts.patch Additional changes to set the proper context during privilege separation
* openssh-7.6p1-cleanup-selinux.patch Various changes and putting the pieces together For now we don\'t ship the ssh-keycat command, but we need the patch for the other SELinux infrastructure This change fixes issues like bsc#1214788, where the ssh daemon needs to act on behalf of a user and needs a proper context for this
* Tue Oct 24 2023 Dominique Leuenberger - Add cb4ed12f.patch: Fix build using zlib 1.3. The check expected a version in the form a.b.c[.d], which no longer matches 1.3.
* Wed Sep 27 2023 Thorsten Kukuk - Disable SLP by default for Factory and ALP (bsc#1214884)
* Fri Jul 21 2023 Simon Lees - Update to openssh 9.3p2: Security ======== Fix a condition where specific libaries loaded via ssh-agent(1)\'s PKCS#11 support could be abused to achieve remote code execution via a forwarded agent socket if the following conditions are met (bsc#1213504, CVE-2023-38408):
* Exploitation requires the presence of specific libraries on the victim system.
* Remote exploitation requires that the agent was forwarded to an attacker-controlled system. Exploitation can also be prevented by starting ssh-agent(1) with an empty PKCS#11/FIDO allowlist (ssh-agent -P \'\') or by configuring an allowlist that contains only specific provider libraries. This vulnerability was discovered and demonstrated to be exploitable by the Qualys Security Advisory team. In addition to removing the main precondition for exploitation, this release removes the ability for remote ssh-agent(1) clients to load PKCS#11 modules by default (see below). Potentially-incompatible changes - -------------------------------
* ssh-agent(8): the agent will now refuse requests to load PKCS#11 modules issued by remote clients by default. A flag has been added to restore the previous behaviour \"-Oallow-remote-pkcs11\". Note that ssh-agent(8) depends on the SSH client to identify requests that are remote. The OpenSSH >=8.9 ssh(1) client does this, but forwarding access to an agent socket using other tools may circumvent this restriction.
* Wed Jun 21 2023 Thorsten Kukuk - Disable old lastlog, we use pam_lastlog2- openssh-8.4p1-pam_motd.patch: adjust to remove PrintLastLog
* Thu Jun 15 2023 Thorsten Kukuk - logind_set_tty.patch: tell systemd-logind our current TTY
* Thu May 11 2023 Antonio Larrosa - Update to openssh 9.3p1: = Security
* ssh-add(1): when adding smartcard keys to ssh-agent(1) with the per-hop destination constraints (ssh-add -h ...) added in OpenSSH 8.9, a logic error prevented the constraints from being communicated to the agent. This resulted in the keys being added without constraints. The common cases of non-smartcard keys and keys without destination constraints are unaffected. This problem was reported by Luci Stanescu.
* ssh(1): Portable OpenSSH provides an implementation of the getrrsetbyname(3) function if the standard library does not provide it, for use by the VerifyHostKeyDNS feature. A specifically crafted DNS response could cause this function to perform an out-of-bounds read of adjacent stack data, but this condition does not appear to be exploitable beyond denial-of- service to the ssh(1) client. The getrrsetbyname(3) replacement is only included if the system\'s standard library lacks this function and portable OpenSSH was not compiled with the ldns library (--with-ldns). getrrsetbyname(3) is only invoked if using VerifyHostKeyDNS to fetch SSHFP records. This problem was found by the Coverity static analyzer. = New features
* ssh-keygen(1), ssh-keyscan(1): accept -Ohashalg=sha1|sha256 when outputting SSHFP fingerprints to allow algorithm selection. bz3493
* sshd(8): add a `sshd -G` option that parses and prints the effective configuration without attempting to load private keys and perform other checks. This allows usage of the option before keys have been generated and for configuration evaluation and verification by unprivileged users. = Bugfixes
* scp(1), sftp(1): fix progressmeter corruption on wide displays; bz3534
* ssh-add(1), ssh-keygen(1): use RSA/SHA256 when testing usability of private keys as some systems are starting to disable RSA/SHA1 in libcrypto.
* sftp-server(8): fix a memory leak. GHPR363
* ssh(1), sshd(8), ssh-keyscan(1): remove vestigal protocol compatibility code and simplify what\'s left.
* Fix a number of low-impact Coverity static analysis findings. These include several reported via bz2687
* ssh_config(5), sshd_config(5): mention that some options are not first-match-wins.
* Rework logging for the regression tests. Regression tests will now capture separate logs for each ssh and sshd invocation in a test.
* ssh(1): make `ssh -Q CASignatureAlgorithms` work as the manpage says it should; bz3532.
* ssh(1): ensure that there is a terminating newline when adding a new entry to known_hosts; bz3529 = Portability
* sshd(8): harden Linux seccomp sandbox. Move to an allowlist of mmap(2), madvise(2) and futex(2) flags, removing some concerning kernel attack surface.
* sshd(8): improve Linux seccomp-bpf sandbox for older systems; bz3537- Update to openssh 9.2p1: = Security
* sshd(8): fix a pre-authentication double-free memory fault introduced in OpenSSH 9.1. This is not believed to be exploitable, and it occurs in the unprivileged pre-auth process that is subject to chroot(2) and is further sandboxed on most major platforms.
* ssh(8): in OpenSSH releases after 8.7, the PermitRemoteOpen option would ignore its first argument unless it was one of the special keywords \"any\" or \"none\", causing the permission list to fail open if only one permission was specified. bz3515
* ssh(1): if the CanonicalizeHostname and CanonicalizePermittedCNAMEs options were enabled, and the system/libc resolver did not check that names in DNS responses were valid, then use of these options could allow an attacker with control of DNS to include invalid characters (possibly including wildcards) in names added to known_hosts files when they were updated. These names would still have to match the CanonicalizePermittedCNAMEs allow-list, so practical exploitation appears unlikely. = Potentially-incompatible changes
* ssh(1): add a new EnableEscapeCommandline ssh_config(5) option that controls whether the client-side ~C escape sequence that provides a command-line is available. Among other things, the ~C command-line could be used to add additional port-forwards at runtime. This option defaults to \"no\", disabling the ~C command-line that was previously enabled by default. Turning off the command-line allows platforms that support sandboxing of the ssh(1) client (currently only OpenBSD) to use a stricter default sandbox policy. = New features
* sshd(8): add support for channel inactivity timeouts via a new sshd_config(5) ChannelTimeout directive. This allows channels that have not seen traffic in a configurable interval to be automatically closed. Different timeouts may be applied to session, X11, agent and TCP forwarding channels.
* sshd(8): add a sshd_config UnusedConnectionTimeout option to terminate client connections that have no open channels for a length of time. This complements the ChannelTimeout option above.
* sshd(8): add a -V (version) option to sshd like the ssh client has.
* ssh(1): add a \"Host\" line to the output of ssh -G showing the original hostname argument. bz3343
* scp(1), sftp(1): add a -X option to both scp(1) and sftp(1) to allow control over some SFTP protocol parameters: the copy buffer length and the number of in-flight requests, both of which are used during upload/download. Previously these could be controlled in sftp(1) only. This makes them available in both SFTP protocol clients using the same option character sequence.
* ssh-keyscan(1): allow scanning of complete CIDR address ranges, e.g. \"ssh-keyscan 192.168.0.0/24\". If a CIDR range is passed, then it will be expanded to all possible addresses in the range including the all-0s and all-1s addresses. bz#976
* ssh(1): support dynamic remote port forwarding in escape command-line\'s -R processing. bz#3499 = Bugfixes
* ssh(1): when restoring non-blocking mode to stdio fds, restore exactly the flags that ssh started with and don\'t just clobber them with zero, as this could also remove the append flag from the set. bz3523
* ssh(1): avoid printf(\"%s\", NULL) if using UserKnownHostsFile=none and a hostkey in one of the system known hosts file changes.
* scp(1): switch scp from using pipes to a socket-pair for communication with its ssh sub-processes, matching how sftp(1) operates.
* sshd(8): clear signal mask early in main(); sshd may have been started with one or more signals masked (sigprocmask(2) is not cleared on fork/exec) and this could interfere with various things, e.g. the login grace timer. Execution environments that fail to clear the signal mask before running sshd are clearly broken, but apparently they do exist.
* ssh(1): warn if no host keys for hostbased auth can be loaded.
* sshd(8): Add server debugging for hostbased auth that is queued and sent to the client after successful authentication, but also logged to assist in diagnosis of HostbasedAuthentication problems. bz3507
* ssh(1): document use of the IdentityFile option as being usable to list public keys as well as private keys. GHPR352
* sshd(8): check for and disallow MaxStartups values less than or equal to zero during config parsing, rather than failing later at runtime. bz3489
* ssh-keygen(1): fix parsing of hex cert expiry times specified on the command-line when acting as a CA.
* scp(1): when scp(1) is using the SFTP protocol for transport (the default), better match scp/rcp\'s handling of globs that don\'t match the globbed characters but do match literally (e.g. trying to transfer a file named \"foo.[1]\"). Previously scp(1) in SFTP mode would not match these pathnames but legacy scp/rcp mode would. bz3488
* ssh-agent(1): document the \"-O no-restrict-websafe\" command-line option.
* ssh(1): honour user\'s umask(2) if it is more restrictive then the ssh default (022). = Portability
* sshd(8): allow writev(2) in the Linux seccomp sandbox. This seems to be used by recent glibcs at least in some configurations during error conditions. bz3512.
* sshd(8): simply handling of SSH_CONNECTION PAM env var, removing global variable and checking the return value from pam_putenv. bz3508
* sshd(8): disable SANDBOX_SECCOMP_FILTER_DEBUG that was mistakenly enabled during the OpenSSH 9.1 release cycle.
* misc: update autotools and regenerate the config files using the latest autotools
* all: use -fzero-call-used-regs=used on clang 15 instead of - fzero-call-used-reg=all, as some versions of clang 15 have miscompile code when it was enabled. bz3475
* sshd(8): defer PRNG seeding until after the initial closefrom(2) call. PRNG seeding will initialize OpenSSL, and some engine providers (e.g. Intel\'s QAT) will open descriptors for their own use that closefrom(2) could clobber. bz3483
* misc: in the poll(2)/ppoll(2) compatibility code, avoid assuming the layout of fd_set.
* sftp-server(8), ssh-agent(1): fix ptrace(2) disabling on older FreeBSD kernels. Some versions do not support using id 0 to refer to the current PID for procctl, so try again with getpid() explicitly before failing.
* configure.ac: fix -Wstrict-prototypes in configure test code. Clang 16 now warns on this and legacy prototypes will be removed in C23. GHPR355
* configure.ac: fix setres
*id checks to work with clang-16. glibc has the prototypes for setresuid behind _GNU_SOURCE, and clang 16 will error out on implicit function definitions. bz3497- Update to openssh 9.1p1: = Security
* ssh-keyscan(1): fix a one-byte overflow in SSH- banner processing. Reported by Qualys
* ssh-keygen(1): double free() in error path of file hashing step in signing/verify code; GHPR333
* ssh-keysign(8): double-free in error path introduced in openssh-8.9 = Potentially-incompatible changes
* The portable OpenSSH project now signs commits and release tags using git\'s recent SSH signature support. The list of developer signing keys is included in the repository as .git_allowed_signers and is cross-signed using the PGP key that is still used to sign release artifacts: https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/RELEASE_KEY.asc
* ssh(1), sshd(8): SetEnv directives in ssh_config and sshd_config are now first-match-wins to match other directives. Previously if an environment variable was multiply specified the last set value would have been used. bz3438
* ssh-keygen(8): ssh-keygen -A (generate all default host key types) will no longer generate DSA keys, as these are insecure and have not been used by default for some years. = New features
* ssh(1), sshd(8): add a RequiredRSASize directive to set a minimum RSA key length. Keys below this length will be ignored for user authentication and for host authentication in sshd(8). ssh(1) will terminate a connection if the server offers an RSA key that falls below this limit, as the SSH protocol does not include the ability to retry a failed key exchange.
* sftp-server(8): add a \"users-groups-by-idAATTopenssh.com\" extension request that allows the client to obtain user/group names that correspond to a set of uids/gids.
* sftp(1): use \"users-groups-by-idAATTopenssh.com\" sftp-server extension (when available) to fill in user/group names for directory listings.
* sftp-server(8): support the \"home-directory\" extension request defined in draft-ietf-secsh-filexfer-extensions-00. This overlaps a bit with the existing \"expand-pathAATTopenssh.com\", but some other clients support it.
* ssh-keygen(1), sshd(8): allow certificate validity intervals, sshsig verification times and authorized_keys expiry-time options to accept dates in the UTC time zone in addition to the default of interpreting them in the system time zone. YYYYMMDD and YYMMDDHHMM[SS] dates/times will be interpreted as UTC if suffixed with a \'Z\' character. Also allow certificate validity intervals to be specified in raw seconds-since-epoch as hex value, e.g. -V 0x1234:0x4567890. This is intended for use by regress tests and other tools that call ssh-keygen as part of a CA workflow. bz3468
* sftp(1): allow arguments to the sftp -D option, e.g. sftp -D \"/usr/libexec/sftp-server -el debug3\"
* ssh-keygen(1): allow the existing -U (use agent) flag to work with \"-Y sign\" operations, where it will be interpreted to require that the private keys is hosted in an agent; bz3429 = Bugfixes
* ssh-keygen(1): implement the \"verify-required\" certificate option. This was already documented when support for user-verified FIDO keys was added, but the ssh-keygen(1) code was missing.
* ssh-agent(1): hook up the restrict_websafe command-line flag; previously the flag was accepted but never actually used.
* sftp(1): improve filename tab completions: never try to complete names to non-existent commands, and better match the completion type (local or remote filename) against the argument position being completed.
* ssh-keygen(1), ssh(1), ssh-agent(1): several fixes to FIDO key handling, especially relating to keys that request user-verification. These should reduce the number of unnecessary PIN prompts for keys that support intrinsic user verification. GHPR302, GHPR329
* ssh-keygen(1): when enrolling a FIDO resident key, check if a credential with matching application and user ID strings already exists and, if so, prompt the user for confirmation before overwriting the credential. GHPR329
* sshd(8): improve logging of errors when opening authorized_keys files. bz2042
* ssh(1): avoid multiplexing operations that could cause SIGPIPE from causing the client to exit early. bz3454
* ssh_config(5), sshd_config(5): clarify that the RekeyLimit directive applies to both transmitted and received data. GHPR328
* ssh-keygen(1): avoid double fclose() in error path.
* sshd(8): log an error if pipe() fails while accepting a connection. bz3447
* ssh(1), ssh-keygen(1): fix possible NULL deref when built without FIDO support. bz3443
* ssh-keyscan(1): add missing
*-sk types to ssh-keyscan manpage. GHPR294.
* sshd(8): ensure that authentication passwords are cleared from memory in error paths. GHPR286
* ssh(1), ssh-agent(1): avoid possibility of notifier code executing kill(-1). GHPR286
* ssh_config(5): note that the ProxyJump directive also accepts the same tokens as ProxyCommand. GHPR305.
* scp(1): do not not ftruncate(3) files early when in sftp mode. The previous behaviour of unconditionally truncating the destination file would cause \"scp ~/foo localhost:foo\" and the reverse \"scp localhost:foo ~/foo\" to delete all the contents of their destination. bz3431
* ssh-keygen(1): improve error message when \'ssh-keygen -Y sign\' is unable to load a private key; bz3429
* sftp(1), scp(1): when performing operations that glob(3) a remote path, ensure that the implicit working directory used to construct that path escapes glob(3) characters. This prevents glob characters from being processed in places they shouldn\'t, e.g. \"cd /tmp/a
*/\", \"get
*.txt\" should have the get operation treat the path \"/tmp/a
*\" literally and not attempt to expand it.
* ssh(1), sshd(8): be stricter in which characters will be accepted in specifying a mask length; allow only 0-9. GHPR278
* ssh-keygen(1): avoid printing hash algorithm twice when dumping a KRL
* ssh(1), sshd(8): continue running local I/O for open channels during SSH transport rekeying. This should make ~-escapes work in the client (e.g. to exit) if the connection happened to have stalled during a rekey event.
* ssh(1), sshd(8): avoid potential poll() spin during rekeying
* Further hardening for sshbuf internals: disallow \"reparenting\" a hierarchical sshbuf and zero the entire buffer if reallocation fails. GHPR287 = Portability
* ssh(1), ssh-keygen(1), sshd(8): automatically enable the built-in FIDO security key support if libfido2 is found and usable, unless --without-security-key-builtin was requested.
* ssh(1), ssh-keygen(1), sshd(8): many fixes to make the WinHello FIDO device usable on Cygwin. The windows://hello FIDO device will be automatically used by default on this platform unless requested otherwise, or when probing resident FIDO credentials (an operation not currently supported by WinHello).
* Portable OpenSSH: remove workarounds for obsolete and unsupported versions of OpenSSL libcrypto. In particular, this release removes fallback support for OpenSSL that lacks AES-CTR or AES-GCM. Those AES cipher modes were added to OpenSSL prior to the minimum version currently supported by OpenSSH, so this is not expected to impact any currently supported configurations.
* sshd(8): fix SANDBOX_SECCOMP_FILTER_DEBUG on current Linux/glibc
* All: resync and clean up internal CSPRNG code.
* scp(1), sftp(1), sftp-server(8): avoid linking these programs with unnecessary libraries. They are no longer linked against libz and libcrypto. This may be of benefit to space constrained systems using any of those components in isolation.
* sshd(8): add AUDIT_ARCH_PPC to supported seccomp sandbox architectures.
* configure: remove special casing of crypt(). configure will no longer search for crypt() in libcrypto, as it was removed from there years ago. configure will now only search libc and libcrypt.
* configure: refuse to use OpenSSL 3.0.4 due to potential RCE in its RSA implementation (CVE-2022-2274) on x86_64.
* All: request 1.1x API compatibility for OpenSSL >=3.x; GHPR322
* ssh(1), ssh-keygen(1), sshd(8): fix a number of missing includes required by the XMSS code on some platforms.
* sshd(8): cache timezone data in capsicum sandbox.- Update to openssh 9.0p1: = Potentially-incompatible changes
* This release switches scp(1) from using the legacy scp/rcp protocol to using the SFTP protocol by default. Legacy scp/rcp performs wildcard expansion of remote filenames (e.g. \"scp host:
* .\") through the remote shell. This has the side effect of requiring double quoting of shell meta-characters in file names included on scp(1) command-lines, otherwise they could be interpreted as shell commands on the remote side. This creates one area of potential incompatibility: scp(1) when using the SFTP protocol no longer requires this finicky and brittle quoting, and attempts to use it may cause transfers to fail. We consider the removal of the need for double-quoting shell characters in file names to be a benefit and do not intend to introduce bug-compatibility for legacy scp/rcp in scp(1) when using the SFTP protocol. Another area of potential incompatibility relates to the use of remote paths relative to other user\'s home directories, for example - \"scp host:~user/file /tmp\". The SFTP protocol has no native way to expand a ~user path. However, sftp-server(8) in OpenSSH 8.7 and later support a protocol extension \"expand-pathAATTopenssh.com\" to support this. In case of incompatibility, the scp(1) client may be instructed to use the legacy scp/rcp using the -O flag. = New features
* ssh(1), sshd(8): use the hybrid Streamlined NTRU Prime + x25519 key exchange method by default (\"sntrup761x25519-sha512AATTopenssh.com\"). The NTRU algorithm is believed to resist attacks enabled by future quantum computers and is paired with the X25519 ECDH key exchange (the previous default) as a backstop against any weaknesses in NTRU Prime that may be discovered in the future. The combination ensures that the hybrid exchange offers at least as good security as the status quo. We are making this change now (i.e. ahead of cryptographically- relevant quantum computers) to prevent \"capture now, decrypt later\" attacks where an adversary who can record and store SSH session ciphertext would be able to decrypt it once a sufficiently advanced quantum computer is available.
* sftp-server(8): support the \"copy-data\" extension to allow server-side copying of files/data, following the design in draft-ietf-secsh-filexfer-extensions-00. bz2948
* sftp(1): add a \"cp\" command to allow the sftp client to perform server-side file copies. = Bugfixes
* ssh(1), sshd(8): upstream: fix poll(2) spin when a channel\'s output fd closes without data in the channel buffer. bz3405 and bz3411
* sshd(8): pack pollfd array in server listen/accept loop. Could cause the server to hang/spin when MaxStartups > RLIMIT_NOFILE
* ssh-keygen(1): avoid NULL deref via the find-principals and check-novalidate operations. bz3409 and GHPR307 respectively.
* scp(1): fix a memory leak in argument processing. bz3404
* sshd(8): don\'t try to resolve ListenAddress directives in the sshd re-exec path. They are unused after re-exec and parsing errors (possible for example if the host\'s network configuration changed) could prevent connections from being accepted.
* sshd(8): when refusing a public key authentication request from a client for using an unapproved or unsupported signature algorithm include the algorithm name in the log message to make debugging easier. = Portability
* sshd(8): refactor platform-specific locked account check, fixing an incorrect free() on platforms with both libiaf and shadow passwords (probably only Unixware) GHPR284,
* ssh(1), sshd(8): Fix possible integer underflow in scan_scaled(3) parsing of K/M/G/etc quantities. bz#3401.
* sshd(8): provide killpg implementation (mostly for Tandem NonStop) GHPR301.
* Check for missing ftruncate prototype. GHPR301
* sshd(8): default to not using sandbox when cross compiling. On most systems poll(2) does not work when the number of FDs is reduced with setrlimit, so assume it doesn\'t when cross compiling and we can\'t run the test. bz#3398.
* sshd(8): allow ppoll_time64 in seccomp sandbox. Should fix sandbox violations on some (at least i386 and armhf) 32bit Linux platforms. bz#3396.
* Improve detection of -fzero-call-used-regs=all support in configure script.- Add patch that explicitly adds -lz in Makefile.in to some binaries which need it:
* fix-missing-lz.patch- Rebase patches:
* openssh-7.7p1-fips.patch
* openssh-7.7p1-fips_checks.patch
* openssh-7.7p1-ldap.patch
* openssh-7.7p1-pam_check_locks.patch
* openssh-7.7p1-seccomp_ipc_flock.patch
* openssh-7.7p1-sftp_print_diagnostic_messages.patch
* openssh-7.7p1-systemd-notify.patch
* openssh-8.0p1-gssapi-keyex.patch
* openssh-8.1p1-audit.patch
* openssh-8.1p1-ed25519-use-openssl-rng.patch
* openssh-8.4p1-vendordir.patch
* openssh-reenable-dh-group14-sha1-default.patch
* openssh-whitelist-syscalls.patch
* wtmpdb.patch- Fix setting libexec dir in the LDAP patch.- Fix build in Leap 15.x which doesn\'t use %{_distconfdir}
* Fri May 05 2023 Dominique Leuenberger - Add _multibuild to define 2nd spec file as additional flavor. Eliminates the need for source package links in OBS.
* Mon Apr 17 2023 Thorsten Kukuk - wtmpdb.patch: add support for wtmpdb to sshd [jsc#PED-3144]
* Mon Mar 27 2023 Thorsten Kukuk - Rename sshd.pamd to sshd-sle.pamd and fix order of pam_keyinit- Add new sshd.pamd including postlogin-
* config files
* Wed Feb 15 2023 Thorsten Kukuk - Remove BuildRequires for libtirpc, we don\'t use it
* Tue Feb 14 2023 Thorsten Kukuk - Remove pam_lastlog from sshd PAM config. sshd is doing the same, too, which leads to e.g. duplicate entries in wtmp [bsc#1208243]
* Mon Dec 19 2022 Otto Hollmann - Adapt OpenSSH to build with OpenSSL 3, use new KDF API (bsc#1205042) Add openssh-openssl-3.patch
* Thu Dec 15 2022 Dirk Müller - limit to openssl < 3.0 as this version is not compatible (bsc#1205042) next version update will fix it
* Thu Nov 10 2022 Hans Petter Jansson - Update openssh-8.1p1-audit.patch: Merge fix for race condition (bsc#1115550, bsc#1174162).- Add openssh-do-not-send-empty-message.patch, which prevents superfluous newlines with empty MOTD files (bsc#1192439).
* Mon Aug 08 2022 Thorsten Kukuk - Use %_pam_vendordir
* Wed Jul 06 2022 Adam Majer - openssh-8.4p1-ssh_config_d.patch: admin overrides should take priority (listed first) over package defaults
* Mon Mar 28 2022 Ludwig Nussel - read ssh and sshd config file also from /usr/etc- add openssh-server-config-rootlogin subpackage that enabled PermitRootLogin
* Mon Mar 07 2022 Hans Petter Jansson - Version update to 8.9p1: = Security
* sshd(8): fix an integer overflow in the user authentication path that, in conjunction with other logic errors, could have yielded unauthenticated access under difficult to exploit conditions. This situation is not exploitable because of independent checks in the privilege separation monitor. Privilege separation has been enabled by default in since openssh-3.2.2 (released in 2002) and has been mandatory since openssh-7.5 (released in 2017). Moreover, portable OpenSSH has used toolchain features available in most modern compilers to abort on signed integer overflow since openssh-6.5 (released in 2014). Thanks to Malcolm Stagg for finding and reporting this bug. = Potentially-incompatible changes
* sshd(8), portable OpenSSH only: this release removes in-built support for MD5-hashed passwords. If you require these on your system then we recommend linking against libxcrypt or similar.
* This release modifies the FIDO security key middleware interface and increments SSH_SK_VERSION_MAJOR. = New features
* ssh(1), sshd(8), ssh-add(1), ssh-agent(1): add a system for restricting forwarding and use of keys added to ssh-agent(1) A detailed description of the feature is available at https://www.openssh.com/agent-restrict.html and the protocol extensions are documented in the PROTOCOL and PROTOCOL.agent files in the source release.
* ssh(1), sshd(8): add the sntrup761x25519-sha512AATTopenssh.com hybrid ECDH/x25519 + Streamlined NTRU Prime post-quantum KEX to the default KEXAlgorithms list (after the ECDH methods but before the prime-group DH ones). The next release of OpenSSH is likely to make this key exchange the default method.
* ssh-keygen(1): when downloading resident keys from a FIDO token, pass back the user ID that was used when the key was created and append it to the filename the key is written to (if it is not the default). Avoids keys being clobbered if the user created multiple resident keys with the same application string but different user IDs.
* ssh-keygen(1), ssh(1), ssh-agent(1): better handling for FIDO keys on tokens that provide user verification (UV) on the device itself, including biometric keys, avoiding unnecessary PIN prompts.
* ssh-keygen(1): add \"ssh-keygen -Y match-principals\" operation to perform matching of principals names against an allowed signers file. To be used towards a TOFU model for SSH signatures in git.
* ssh-add(1), ssh-agent(1): allow pin-required FIDO keys to be added to ssh-agent(1). $SSH_ASKPASS will be used to request the PIN at authentication time.
* ssh-keygen(1): allow selection of hash at sshsig signing time (either sha512 (default) or sha256).
* ssh(1), sshd(8): read network data directly to the packet input buffer instead of indirectly via a small stack buffer. Provides a modest performance improvement.
* ssh(1), sshd(8): read data directly to the channel input buffer, providing a similar modest performance improvement.
* ssh(1): extend the PubkeyAuthentication configuration directive to accept yes|no|unbound|host-bound to allow control over one of the protocol extensions used to implement agent-restricted keys. = Bugfixes
* sshd(8): document that CASignatureAlgorithms, ExposeAuthInfo and PubkeyAuthOptions can be used in a Match block. PR277.
* sshd(8): fix possible string truncation when constructing paths to .rhosts/.shosts files with very long user home directory names.
* ssh-keysign(1): unbreak for KEX algorithms that use SHA384/512 exchange hashes
* ssh(1): don\'t put the TTY into raw mode when SessionType=none, avoids ^C being unable to kill such a session. bz3360
* scp(1): fix some corner-case bugs in SFTP-mode handling of ~-prefixed paths.
* ssh(1): unbreak hostbased auth using RSA keys. Allow ssh(1) to select RSA keys when only RSA/SHA2 signature algorithms are configured (this is the default case). Previously RSA keys were not being considered in the default case.
* ssh-keysign(1): make ssh-keysign use the requested signature algorithm and not the default for the key type. Part of unbreaking hostbased auth for RSA/SHA2 keys.
* ssh(1): stricter UpdateHostkey signature verification logic on the client- side. Require RSA/SHA2 signatures for RSA hostkeys except when RSA/SHA1 was explicitly negotiated during initial KEX; bz3375
* ssh(1), sshd(8): fix signature algorithm selection logic for UpdateHostkeys on the server side. The previous code tried to prefer RSA/SHA2 for hostkey proofs of RSA keys, but missed some cases. This will use RSA/SHA2 signatures for RSA keys if the client proposed these algorithms in initial KEX. bz3375
* All: convert all uses of select(2)/pselect(2) to poll(2)/ppoll(2). This includes the mainloops in ssh(1), ssh-agent(1), ssh-agent(1) and sftp-server(8), as well as the sshd(8) listen loop and all other FD read/writability checks. On platforms with missing or broken poll(2)/ppoll(2) syscalls a select(2)-based compat shim is available.
* ssh-keygen(1): the \"-Y find-principals\" command was verifying key validity when using ca certs but not with simple key lifetimes within the allowed signers file.
* ssh-keygen(1): make sshsig verify-time argument parsing optional
* sshd(8): fix truncation in rhosts/shosts path construction.
* ssh(1), ssh-agent(1): avoid xmalloc(0) for PKCS#11 keyid for ECDSA keys (we already did this for RSA keys). Avoids fatal errors for PKCS#11 libraries that return empty keyid, e.g. Microchip ATECC608B \"cryptoauthlib\"; bz#3364
* ssh(1), ssh-agent(1): improve the testing of credentials against inserted FIDO: ask the token whether a particular key belongs to it in cases where the token supports on-token user-verification (e.g. biometrics) rather than just assuming that it will accept it. Will reduce spurious \"Confirm user presence\" notifications for key handles that relate to FIDO keys that are not currently inserted in at least some cases. bz3366
* ssh(1), sshd(8): correct value for IPTOS_DSCP_LE. It needs to allow for the preceding two ECN bits. bz#3373
* ssh-keygen(1): add missing -O option to usage() for the \"-Y sign\" option.
* ssh-keygen(1): fix a NULL deref when using the find-principals function, when matching an allowed_signers line that contains a namespace restriction, but no restriction specified on the command-line
* ssh-agent(1): fix memleak in process_extension(); oss-fuzz issue #42719
* ssh(1): suppress \"Connection to xxx closed\" messages when LogLevel is set to \"error\" or above. bz3378
* ssh(1), sshd(8): use correct zlib flags when inflate(3)-ing compressed packet data. bz3372
* scp(1): when recursively transferring files in SFTP mode, create the destination directory if it doesn\'t already exist to match scp(1) in legacy RCP mode behaviour.
* scp(1): many improvements in error message consistency between scp(1) in SFTP mode vs legacy RCP mode.
* sshd(8): fix potential race in SIGTERM handling PR289
* ssh(1), ssh(8): since DSA keys are deprecated, move them to the end of the default list of public keys so that they will be tried last. PR295
* ssh-keygen(1): allow \'ssh-keygen -Y find-principals\' to match wildcard principals in allowed_signers files = Portability
* ssh(1), sshd(8): don\'t trust closefrom(2) on Linux. glibc\'s implementation does not work in a chroot when the kernel does not have close_range(2). It tries to read from /proc/self/fd and when that fails dies with an assertion of sorts. Instead, call close_range(2) directly from our compat code and fall back if that fails. bz#3349,
* OS X poll(2) is broken; use compat replacement. For character- special devices like /dev/null, Darwin\'s poll(2) returns POLLNVAL when polled with POLLIN. Apparently this is Apple bug 3710161 - not public but a websearch will find other OSS projects rediscovering it periodically since it was first identified in 2005.
* Correct handling of exceptfds/POLLPRI in our select(2)-based poll(2)/ppoll(2) compat implementation.
* Cygwin: correct checking of mbstowcs() return value.
* Add a basic SECURITY.md that refers people to the openssh.com website.
* Enable additional compiler warnings and toolchain hardening flags, including -Wbitwise-instead-of-logical, -Wmisleading-indentation, - fzero-call-used-regs and -ftrivial-auto-var-init.
* HP/UX. Use compat getline(3) on HP-UX 10.x, where the libc version is not reliable.- Rebased patches:
* openssh-7.7p1-ldap.patch
* openssh-8.0p1-gssapi-keyex.patch
* openssh-8.1p1-audit.patch
* openssh-8.4p1-vendordir.patch
* openssh-reenable-dh-group14-sha1-default.patch
* Tue Sep 28 2021 Hans Petter Jansson - Version update to 8.8p1: = Security
* sshd(8) from OpenSSH 6.2 through 8.7 failed to correctly initialise supplemental groups when executing an AuthorizedKeysCommand or AuthorizedPrincipalsCommand, where a AuthorizedKeysCommandUser or AuthorizedPrincipalsCommandUser directive has been set to run the command as a different user. Instead these commands would inherit the groups that sshd(8) was started with. Depending on system configuration, inherited groups may allow AuthorizedKeysCommand/AuthorizedPrincipalsCommand helper programs to gain unintended privilege (bsc#1190975, CVE-2021-41617). Neither AuthorizedKeysCommand nor AuthorizedPrincipalsCommand are enabled by default in sshd_config(5). = Potentially-incompatible changes
* This release disables RSA signatures using the SHA-1 hash algorithm by default. This change has been made as the SHA-1 hash algorithm is cryptographically broken, and it is possible to create chosen-prefix hash collisions for * ssh(1): allow the ssh_config(5) CanonicalizePermittedCNAMEs directive to accept a \"none\" argument to specify the default behaviour. = Bugfixes
* scp(1): when using the SFTP protocol, continue transferring files after a transfer error occurs, better matching original scp/rcp behaviour.
* ssh(1): fixed a number of memory leaks in multiplexing,
* ssh-keygen(1): avoid crash when using the -Y find-principals command.
* A number of documentation and manual improvements, including bz#3340, PR139, PR215, PR241, PR257- Additional changes from 8.7p1 release: = Potentially-incompatible changes
* scp(1): this release changes the behaviour of remote to remote copies (e.g. \"scp host-a:/path host-b:\") to transfer through the local host by default. This was previously available via the -3 flag. This mode avoids the need to expose credentials on the origin hop, avoids triplicate interpretation of filenames by the shell (by the local system, the copy origin and the destination) and, in conjunction with the SFTP support for scp(1) mentioned below, allows use of all authentication methods to the remote hosts (previously, only non-interactive methods could be used). A -R flag has been added to select the old behaviour.
* ssh(1)/sshd(8): both the client and server are now using a stricter configuration file parser. The new parser uses more shell-like rules for quotes, space and escape characters. It is also more strict in rejecting configurations that include options lacking arguments. Previously some options (e.g. DenyUsers) could appear on a line with no subsequent arguments. This release will reject such configurations. The new parser will also reject configurations with unterminated quotes and multiple \'=\' characters after the option name.
* ssh(1): when using SSHFP DNS records for host key verification, ssh(1) will verify all matching records instead of just those with the specific signature type requested. This may cause host key verification problems if stale SSHFP records of a different or legacy signature type exist alongside other records for a particular host. bz#3322
* ssh-keygen(1): when generating a FIDO key and specifying an explicit attestation challenge (using -Ochallenge), the challenge will now be hashed by the builtin security key middleware. This removes the (undocumented) requirement that challenges be exactly 32 bytes in length and matches the expectations of libfido2.
* sshd(8): environment=\"...\" directives in authorized_keys files are now first-match-wins and limited to 1024 discrete environment variable names. = New features
* scp(1): experimental support for transfers using the SFTP protocol as a replacement for the venerable SCP/RCP protocol that it has traditionally used. SFTP offers more predictable filename handling and does not require expansion of glob(3) patterns via the shell on the remote side.
* sftp-server(8): add a protocol extension to support expansion of ~/ and ~user/ prefixed paths. This was added to support these paths when used by scp(1) while in SFTP mode.
* ssh(1): add a ForkAfterAuthentication ssh_config(5) counterpart to the ssh(1) -f flag. GHPR231
* ssh(1): add a StdinNull directive to ssh_config(5) that allows the config file to do the same thing as -n does on the ssh(1) command- line. GHPR231
* ssh(1): add a SessionType directive to ssh_config, allowing the configuration file to offer equivalent control to the -N (no session) and -s (subsystem) command-line flags. GHPR231
* ssh-keygen(1): allowed signers files used by ssh-keygen(1) signatures now support listing key validity intervals alongside they key, and ssh-keygen(1) can optionally check during signature verification whether a specified time falls inside this interval. This feature is intended for use by git to support signing and verifying objects using ssh keys.
* ssh-keygen(8): support printing of the full public key in a sshsig signature via a -Oprint-pubkey flag. = Bugfixes
* ssh(1)/sshd(8): start time-based re-keying exactly on schedule in the client and server mainloops. Previously the re-key timeout could expire but re-keying would not start until a packet was sent or received, causing a spin in select() if the connection was quiescent.
* ssh-keygen(1): avoid Y2038 problem in printing certificate validity lifetimes. Dates past 2^31-1 seconds since epoch were displayed incorrectly on some platforms. bz#3329
* scp(1): allow spaces to appear in usernames for local to remote and scp -3 remote to remote copies. bz#1164
* ssh(1)/sshd(8): remove references to ChallengeResponseAuthentication in favour of KbdInteractiveAuthentication. The former is what was in SSHv1, the latter is what is in SSHv2 (RFC4256) and they were treated as somewhat but not entirely equivalent. We retain the old name as a deprecated alias so configuration files continue to work as well as a reference in the man page for people looking for it. bz#3303
* ssh(1)/ssh-add(1)/ssh-keygen(1): fix decoding of X.509 subject name when extracting a key from a PKCS#11 certificate. bz#3327
* ssh(1): restore blocking status on stdio fds before close. ssh(1) needs file descriptors in non-blocking mode to operate but it was not restoring the original state on exit. This could cause problems with fds shared with other programs via the shell, bz#3280 and GHPR246
* ssh(1)/sshd(8): switch both client and server mainloops from select(3) to pselect(3). Avoids race conditions where a signal may arrive immediately before select(3) and not be processed until an event fires. bz#2158
* ssh(1): sessions started with ControlPersist were incorrectly executing a shell when the -N (no shell) option was specified. bz#3290
* ssh(1): check if IPQoS or TunnelDevice are already set before overriding. Prevents values in config files from overriding values supplied on the command line. bz#3319
* ssh(1): fix debug message when finding a private key to match a certificate being attempted for user authentication. Previously it would print the certificate\'s path, whereas it was supposed to be showing the private key\'s path. GHPR247
* sshd(8): match host certificates against host public keys, not private keys. Allows use of certificates with private keys held in a ssh-agent. bz#3524
* ssh(1): add a workaround for a bug in OpenSSH 7.4 sshd(8), which allows RSA/SHA2 signatures for public key authentication but fails to advertise this correctly via SSH2_MSG_EXT_INFO. This causes clients of these server to incorrectly match PubkeyAcceptedAlgorithmse and potentially refuse to offer valid keys. bz#3213
* sftp(1)/scp(1): degrade gracefully if a sftp-server offers the limitsAATTopenssh.com extension but fails when the client tries to invoke it. bz#3318
* ssh(1): allow ssh_config SetEnv to override $TERM, which is otherwise handled specially by the protocol. Useful in ~/.ssh/config to set TERM to something generic (e.g. \"xterm\" instead of \"xterm-256color\") for destinations that lack terminfo entries.
* sftp-server(8): the limitsAATTopenssh.com extension was incorrectly marked as an operation that writes to the filesystem, which made it unavailable in sftp-server read-only mode. bz#3318
* ssh(1): fix SEGV in UpdateHostkeys debug() message, triggered when the update removed more host keys than remain present.
* Many manual page fixes.- Additional changes from 8.6p1 release: = Security
* sshd(8): OpenSSH 8.5 introduced the LogVerbose keyword. When this option was enabled with a set of patterns that activated logging in code that runs in the low-privilege sandboxed sshd process, the log messages were constructed in such a way that printf(3) format strings could effectively be specified the low-privilege code. = New features
* sftp-server(8): add a new limitsAATTopenssh.com protocol extension that allows a client to discover various server limits, including maximum packet size and maximum read/write length.
* sftp(1): use the new limitsAATTopenssh.com extension (when available) to select better transfer lengths in the client.
* sshd(8): Add ModuliFile keyword to sshd_config to specify the location of the \"moduli\" file containing the groups for DH-GEX.
* unit tests: Add a TEST_SSH_ELAPSED_TIMES environment variable to enable printing of the elapsed time in seconds of each test. = Bugfixes
* ssh_config(5), sshd_config(5): sync CASignatureAlgorithms lists in manual pages with the current default. GHPR174
* ssh(1): ensure that pkcs11_del_provider() is called before exit. GHPR234
* ssh(1), sshd(8): fix problems in string->argv conversion. Multiple backslashes were not being dequoted correctly and quoted space in the middle of a string was being incorrectly split. GHPR223
* ssh(1): return non-zero exit status when killed by signal; bz#3281
* sftp-server(8): increase maximum SSH2_FXP_READ to match the maximum packet size. Also handle zero-length reads that are not explicitly banned by the spec.- Additional changes from 8.5p1 release: = Security
* ssh-agent(1): fixed a double-free memory corruption that was introduced in OpenSSH 8.2 . We treat all such memory faults as potentially exploitable. This bug could be reached by an attacker with access to the agent socket (bsc#1183137, CVE-2021-28041) = Potentially-incompatible changes
* ssh(1), sshd(8): this release changes the first-preference signature algorithm from ECDSA to ED25519.
* ssh(1), sshd(8): set the TOS/DSCP specified in the configuration for interactive use prior to TCP connect. The connection phase of the SSH session is time-sensitive and often explicitly interactive. The ultimate interactive/bulk TOS/DSCP will be set after authentication completes.
* ssh(1), sshd(8): remove the pre-standardization cipher rijndael-cbcAATTlysator.liu.se. It is an alias for aes256-cbc before it was standardized in RFC4253 (2006), has been deprecated and disabled by default since OpenSSH 7.2 (2016) and was only briefly documented in ssh.1 in 2001.
* ssh(1), sshd(8): update/replace the experimental post-quantum hybrid key exchange method based on Streamlined NTRU Prime coupled with X25519. The previous sntrup4591761x25519-sha512AATTtinyssh.org method is replaced with sntrup761x25519-sha512AATTopenssh.com.
* ssh(1): disable CheckHostIP by default. It provides insignificant benefits while making key rotation significantly more difficult, especially for hosts behind IP-based load-balancers. = New features
* ssh(1): this release enables UpdateHostkeys by default subject to some conservative preconditions: - The key was matched in the UserKnownHostsFile (and not in the GlobalKnownHostsFile). - The same key does not exist under another name. - A certificate host key is not in use. - known_hosts contains no matching wildcard hostname pattern. - VerifyHostKeyDNS is not enabled. - The default UserKnownHostsFile is in use.
* ssh(1), sshd(8): add a new LogVerbose configuration directive for that allows forcing maximum debug logging by file/function/line pattern-lists.
* ssh(1): when prompting the user to accept a new hostkey, display any other host names/addresses already associated with the key.
* ssh(1): allow UserKnownHostsFile=none to indicate that no known_hosts file should be used to identify host keys.
* ssh(1): add a ssh_config KnownHostsCommand option that allows the client to obtain known_hosts data from a command in addition to the usual files.
* ssh(1): add a ssh_config PermitRemoteOpen option that allows the client to restrict the destination when RemoteForward is used with SOCKS.
* ssh(1): for FIDO keys, if a signature operation fails with a \"incorrect PIN\" reason and no PIN was initially requested from the user, then request a PIN and retry the operation. This supports some biometric devices that fall back to requiring PIN when reading of the biometric failed, and devices that require PINs for all hosted credentials.
* sshd(8): implement client address-based rate-limiting via new sshd_config(5) PerSourceMaxStartups and PerSourceNetBlockSize directives that provide more fine-grained control on a per-origin address basis than the global MaxStartups limit. = Bugfixes
* ssh(1): Prefix keyboard interactive prompts with \"(userAATThost)\" to make it easier to determine which connection they are associated with in cases like scp -3, ProxyJump, etc. bz#3224
* sshd(8): fix sshd_config SetEnv directives located inside Match blocks. GHPR201
* ssh(1): when requesting a FIDO token touch on stderr, inform the user once the touch has been recorded.
* ssh(1): prevent integer overflow when ridiculously large ConnectTimeout values are specified, capping the effective value (for most platforms) at 24 days. bz#3229
* ssh(1): consider the ECDSA key subtype when ordering host key algorithms in the client.
* ssh(1), sshd(8): rename the PubkeyAcceptedKeyTypes keyword to PubkeyAcceptedAlgorithms. The previous name incorrectly suggested that it control allowed key algorithms, when this option actually specifies the signature algorithms that are accepted. The previous name remains available as an alias. bz#3253
* ssh(1), sshd(8): similarly, rename HostbasedKeyTypes (ssh) and HostbasedAcceptedKeyTypes (sshd) to HostbasedAcceptedAlgorithms.
* sftp-server(8): add missing lsetstatAATTopenssh.com documentation and advertisement in the server\'s SSH2_FXP_VERSION hello packet.
* ssh(1), sshd(8): more strictly enforce KEX state-machine by banning packet types once they are received. Fixes memleak caused by duplicate SSH2_MSG_KEX_DH_GEX_REQUEST (oss-fuzz #30078).
* sftp(1): allow the full range of UIDs/GIDs for chown/chgrp on 32bit platforms instead of being limited by LONG_MAX. bz#3206
* Minor man page fixes (capitalization, commas, etc.) bz#3223
* sftp(1): when doing an sftp recursive upload or download of a read-only directory, ensure that the directory is created with write and execute permissions in the interim so that the transfer can actually complete, then set the directory permission as the final step. bz#3222
* ssh-keygen(1): document the -Z, check the validity of its argument earlier and provide a better error message if it\'s not correct. bz#2879
* ssh(1): ignore comments at the end of config lines in ssh_config, similar to what we already do for sshd_config. bz#2320
* sshd_config(5): mention that DisableForwarding is valid in a sshd_config Match block. bz3239
* sftp(1): fix incorrect sorting of \"ls -ltr\" under some circumstances. bz3248.
* ssh(1), sshd(8): fix potential integer truncation of (unlikely) timeout values. bz#3250
* ssh(1): make hostbased authentication send the signature algorithm in its SSH2_MSG_USERAUTH_REQUEST packets instead of the key type. This make HostbasedAcceptedAlgorithms do what it is supposed to - filter on signature algorithm and not key type.- Rebased patches:
* openssh-7.7p1-IPv6_X_forwarding.patch
* openssh-7.7p1-X11_trusted_forwarding.patch
* openssh-7.7p1-X_forward_with_disabled_ipv6.patch
* openssh-7.7p1-cavstest-ctr.patch
* openssh-7.7p1-cavstest-kdf.patch
* openssh-7.7p1-disable_openssl_abi_check.patch
* openssh-7.7p1-eal3.patch
* openssh-7.7p1-enable_PAM_by_default.patch
* openssh-7.7p1-fips.patch
* openssh-7.7p1-fips_checks.patch
* openssh-7.7p1-host_ident.patch
* openssh-7.7p1-hostname_changes_when_forwarding_X.patch
* openssh-7.7p1-ldap.patch
* openssh-7.7p1-no_fork-no_pid_file.patch
* openssh-7.7p1-pam_check_locks.patch
* openssh-7.7p1-pts_names_formatting.patch
* openssh-7.7p1-remove_xauth_cookies_on_exit.patch
* openssh-7.7p1-seccomp_ipc_flock.patch
* openssh-7.7p1-seccomp_stat.patch
* openssh-7.7p1-send_locale.patch
* openssh-7.7p1-sftp_force_permissions.patch
* openssh-7.7p1-sftp_print_diagnostic_messages.patch
* openssh-7.7p1-systemd-notify.patch
* openssh-7.9p1-keygen-preserve-perms.patch
* openssh-7.9p1-revert-new-qos-defaults.patch
* openssh-8.0p1-gssapi-keyex.patch
* openssh-8.1p1-audit.patch
* openssh-8.1p1-seccomp-clock_gettime64.patch
* openssh-8.1p1-seccomp-clock_nanosleep.patch
* openssh-8.1p1-seccomp-clock_nanosleep_time64.patch
* openssh-8.1p1-use-openssl-kdf.patch
* openssh-8.4p1-vendordir.patch
* openssh-fips-ensure-approved-moduli.patch
* openssh-link-with-sk.patch
* openssh-reenable-dh-group14-sha1-default.patch
* openssh-whitelist-syscalls.patch- Removed openssh-fix-ssh-copy-id.patch (fixed upstream).- openssh.keyring: rotated to new key from https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/RELEASE_KEY.asc
* Thu Aug 19 2021 Thorsten Kukuk - sshd-gen-keys-start: - only source sysconfig file if it exists. - create /etc/ssh if it does not exists. Required for image based installation/updates.
* Mon Jul 19 2021 Cristian Rodríguez - The linux kernel has close_range(2) syscall which current glibc uses to implement closefrom(3) which will be then used by openssh. whitelist the new system call so closefrom does not fail or fallback to iterating proc/self/fd (openssh-whitelist-syscalls.patch)
* Wed Jun 23 2021 Hans Petter Jansson - Don\'t move user-modified ssh_config and sshd_config files to .rpmsave on upgrade.
* Tue May 18 2021 Thorsten Kukuk - Use pam_motd to unify motd message output [bsc#1185897] (openssh-8.4p1-pam_motd.patch)
* Thu Apr 22 2021 Hans Petter Jansson - Change vendor configuration dir from /usr/share/ssh/ to /usr/etc/ssh/.- Remove upgrade enablement hack. This has been fixed in systemd-rpm-macros (bsc#1180083).
* Wed Feb 24 2021 Thorsten Kukuk - Add support for vendor provided configuration files in /usr/share/ssh/ (openssh-8.4p1-vendordir.patch)- Move configuration files from /etc/ssh/ to /usr/share/ssh/
* Thu Feb 18 2021 Johannes Segitz - Drop openssh-7.7p1-allow_root_password_login.patch to prevent login as root via password by default (is also upstream default). Comment indicates that this was a temporary meassure that we now had for five years, time to get rid of it (bsc#1173067)
* Mon Feb 15 2021 Hans Petter Jansson - Add openssh-whitelist-syscalls.patch (bsc#1182232), fixing failure to accept connections on 32-bit platforms with glibc 2.33+.
* Wed Jan 27 2021 Thorsten Kukuk - Add support for /etc/ssh/ssh_config.d and /etc/ssh/sshd_config.d (openssh-8.4p1-ssh_config_d.patch)
* Sat Jan 23 2021 Hans Petter Jansson - Add openssh-fix-ssh-copy-id.patch, which fixes breakage introduced in 8.4p1 (bsc#1181311).
* Fri Jan 22 2021 Hans Petter Jansson - Improve robustness of sshd init detection when upgrading from a pre-systemd distribution.
* Fri Jan 22 2021 Hans Petter Jansson - Add openssh-reenable-dh-group14-sha1-default.patch, which adds diffie-hellman-group14-sha1 key exchange back to the default list (bsc#1180958). This is needed for backwards compatibility with older platforms.
* Fri Jan 22 2021 Hans Petter Jansson - Make sure sshd is enabled correctly when upgrading from a pre-systemd distribution (bsc#1180083).
* Mon Jan 18 2021 Thorsten Kukuk - sysusers-sshd.conf: use sysusers.d configuration file to create sshd user (avoid hard dependency on shadow).
* Mon Jan 18 2021 Dirk Müller - update to 8.4p1: Security ========
* ssh-agent(1): restrict ssh-agent from signing web challenges for FIDO/U2F keys.
* ssh-keygen(1): Enable FIDO 2.1 credProtect extension when generating a FIDO resident key.
* ssh(1), ssh-keygen(1): support for FIDO keys that require a PIN for each use. These keys may be generated using ssh-keygen using a new \"verify-required\" option. When a PIN-required key is used, the user will be prompted for a PIN to complete the signature operation. New Features - -----------
* sshd(8): authorized_keys now supports a new \"verify-required\" option to require FIDO signatures assert that the token verified that the user was present before making the signature. The FIDO protocol supports multiple methods for user-verification, but currently OpenSSH only supports PIN verification.
* sshd(8), ssh-keygen(1): add support for verifying FIDO webauthn signatures. Webauthn is a standard for using FIDO keys in web browsers. These signatures are a slightly different format to plain FIDO signatures and thus require explicit support.
* ssh(1): allow some keywords to expand shell-style ${ENV} environment variables. The supported keywords are CertificateFile, ControlPath, IdentityAgent and IdentityFile, plus LocalForward and RemoteForward when used for Unix domain socket paths. bz#3140
* ssh(1), ssh-agent(1): allow some additional control over the use of ssh-askpass via a new $SSH_ASKPASS_REQUIRE environment variable, including forcibly enabling and disabling its use. bz#69
* ssh(1): allow ssh_config(5)\'s AddKeysToAgent keyword accept a time limit for keys in addition to its current flag options. Time- limited keys will automatically be removed from ssh-agent after their expiry time has passed.
* scp(1), sftp(1): allow the -A flag to explicitly enable agent forwarding in scp and sftp. The default remains to not forward an agent, even when ssh_config enables it.
* ssh(1): add a \'%k\' TOKEN that expands to the effective HostKey of the destination. This allows, e.g., keeping host keys in individual files using \"UserKnownHostsFile ~/.ssh/known_hosts.d/%k\". bz#1654
* ssh(1): add %-TOKEN, environment variable and tilde expansion to the UserKnownHostsFile directive, allowing the path to be completed by the configuration (e.g. bz#1654)
* ssh-keygen(1): allow \"ssh-add -d -\" to read keys to be deleted from stdin. bz#3180
* sshd(8): improve logging for MaxStartups connection throttling. sshd will now log when it starts and stops throttling and periodically while in this state. bz#3055 Bugfixes - -------
* ssh(1), ssh-keygen(1): better support for multiple attached FIDO tokens. In cases where OpenSSH cannot unambiguously determine which token to direct a request to, the user is now required to select a token by touching it. In cases of operations that require a PIN to be verified, this avoids sending the wrong PIN to the wrong token and incrementing the token\'s PIN failure counter (tokens effectively erase their keys after too many PIN failures).
* sshd(8): fix Include before Match in sshd_config; bz#3122
* ssh(1): close stdin/out/error when forking after authentication completes (\"ssh -f ...\") bz#3137
* ssh(1), sshd(8): limit the amount of channel input data buffered, avoiding peers that advertise large windows but are slow to read from causing high memory consumption.
* ssh-agent(1): handle multiple requests sent in a single write() to the agent.
* sshd(8): allow sshd_config longer than 256k
* sshd(8): avoid spurious \"Unable to load host key\" message when sshd load a private key but no public counterpart
* ssh(1): prefer the default hostkey algorithm list whenever we have a hostkey that matches its best-preference algorithm.
* sshd(1): when ordering the hostkey algorithms to request from a server, prefer certificate types if the known_hosts files contain a key marked as a AATTcert-authority; bz#3157
* ssh(1): perform host key fingerprint comparisons for the \"Are you sure you want to continue connecting (yes/no/[fingerprint])?\" prompt with case sensitivity.
* sshd(8): ensure that address/masklen mismatches in sshd_config yield fatal errors at daemon start time rather than later when they are evaluated.
* ssh-keygen(1): ensure that certificate extensions are lexically sorted. Previously if the user specified a custom extension then the everything would be in order except the custom ones. bz#3198
* ssh(1): also compare username when checking for JumpHost loops. bz#3057
* ssh-keygen(1): preserve group/world read permission on known_hosts files across runs of \"ssh-keygen -Rf /path\". The old behaviour was to remove all rights for group/other. bz#3146
* ssh-keygen(1): Mention the [-a rounds] flag in the ssh-keygen manual page and usage().
* sshd(8): explicitly construct path to ~/.ssh/rc rather than relying on it being relative to the current directory, so that it can still be found if the shell startup changes its directory. bz#3185
* sshd(8): when redirecting sshd\'s log output to a file, undo this redirection after the session child process is forked(). Fixes missing log messages when using this feature under some circumstances.
* sshd(8): start ClientAliveInterval bookkeeping before first pass through select() loop; fixed theoretical case where busy sshd may ignore timeouts from client.
* ssh(1): only reset the ServerAliveInterval check when we receive traffic from the server and ignore traffic from a port forwarding client, preventing a client from keeping a connection alive when it should be terminated. bz#2265
* ssh-keygen(1): avoid spurious error message when ssh-keygen creates files outside ~/.ssh
* sftp-client(1): fix off-by-one error that caused sftp downloads to make one more concurrent request that desired. This prevented using sftp(1) in unpipelined request/response mode, which is useful when debugging. bz#3054
* ssh(1), sshd(8): handle EINTR in waitfd() and timeout_connect() helpers. bz#3071
* ssh(1), ssh-keygen(1): defer creation of ~/.ssh until we attempt to write to it so we don\'t leave an empty .ssh directory when it\'s not needed. bz#3156
* ssh(1), sshd(8): fix multiplier when parsing time specifications when handling seconds after other units. bz#3171
* Fri Jan 08 2021 Hans Petter Jansson - Update openssh-8.1p1-audit.patch (bsc#1180501). This fixes occasional crashes on connection termination caused by accessing freed memory.