The Python client library for Glance (python-glanceclient) before 0.10.0 does not properly check the preverify_ok value, which prevents the server hostname from being verified with a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate and allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
https://github.com/openstack/python-glanceclient/blob/master/doc/source/index.rst
https://bugs.launchpad.net/ossa/+bug/1192229
http://www.ubuntu.com/usn/USN-2004-1
http://secunia.com/advisories/54525
http://secunia.com/advisories/54313
http://rhn.redhat.com/errata/RHSA-2013-1200.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00019.html