socket.c in fetchmail before 6.3.11 does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html
http://marc.info/?l=oss-security&m=124949601207156&w=2
http://secunia.com/advisories/36175
http://secunia.com/advisories/36179
http://secunia.com/advisories/36236
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11059
http://support.apple.com/kb/HT3937
http://www.debian.org/security/2009/dsa-1852
http://www.mandriva.com/security/advisories?name=MDVSA-2009:201
http://www.securitytracker.com/id?1022679