python-bugzilla before 0.9.0 does not validate X.509 certificates, which allows man-in-the-middle attackers to spoof Bugzilla servers via a crafted certificate.
https://lists.fedorahosted.org/pipermail/python-bugzilla/2013-June/000104.html
https://bugzilla.redhat.com/show_bug.cgi?id=951594
http://www.openwall.com/lists/oss-security/2013/06/19/6
http://lists.opensuse.org/opensuse-updates/2013-07/msg00026.html
http://lists.opensuse.org/opensuse-updates/2013-07/msg00025.html