Changelog for bird-1.6.6-1.el6.i686.rpm :

* Sat Apr 06 2019 Robert Scheck - 1.6.6-1- Upgrade to 1.6.6 (CVE-2018-12066)- Modernization and cleanup of spec file- Ensure /etc/bird.conf can be only read by BIRD user
* Mon Jun 29 2015 Michal Sekletar - 1.4.5-2- fix bug in the locking code (#1235219)
* Wed Dec 03 2014 Michal Sekletar - 1.4.5-1- update to 1.4.5