QSslSocket in Qt before 4.7.0-rc1 recognizes a wildcard IP address in the subject's Common Name field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
https://bugreports.qt-project.org/browse/QTBUG-4455
http://www.westpoint.ltd.uk/advisories/wp-10-0001.txt
http://www.ubuntu.com/usn/USN-1504-1
http://secunia.com/advisories/49895
http://secunia.com/advisories/49604
http://secunia.com/advisories/41236
http://rhn.redhat.com/errata/RHSA-2012-0880.html
http://qt.gitorious.org/qt/qt/commit/846f1b44eea4bb34d080d055badb40a4a13d369e