Changelog for asterisk20-20.9.3-lp155.19.1.x86_64.rpm :

* Wed Sep 18 2024 Andreas Osterburg - Release asterisk-20.9.3 res_resolver_unbound: Test for NULL ub_result in unbound_resolver_callback Author: George Joseph Date: 2024-08-12 The ub_result pointer passed to unbound_resolver_callback by libunbound can be NULL if the query was for something malformed like `.1` or `[.1]`. If it is, we now set a \'ns_r_formerr\' result and return instead of crashing with a SEGV. This causes pjproject to simply cancel the transaction with a \"No answer record in the DNS response\" error. The existing \"off nominal\" unit test was also updated to check this condition. Although not necessary for this fix, we also made ast_dns_resolver_completed() tolerant of a NULL result. Resolves: GHSA-v428-g3cw-7hv9