The rbovirt gem before 0.0.24 for Ruby uses the rest-client gem with SSL verification disabled, which allows remote attackers to conduct man-in-the-middle attacks via unspecified vectors.
https://bugzilla.redhat.com/show_bug.cgi?id=1058595
http://seclists.org/oss-sec/2014/q1/509
http://lists.fedoraproject.org/pipermail/package-announce/2014-March/130180.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-March/130148.html