sshd in OpenSSH before 4.2, when GSSAPIDelegateCredentials is enabled, allows GSSAPI credentials to be delegated to clients who log in using non-GSSAPI methods, which could cause those credentials to be exposed to untrusted users or hosts.
http://lists.suse.com/archive/suse-security-announce/2006-Feb/0001.html
http://secunia.com/advisories/16686
http://secunia.com/advisories/17077
http://secunia.com/advisories/17245
http://secunia.com/advisories/18010
http://secunia.com/advisories/18406
http://secunia.com/advisories/18507
http://secunia.com/advisories/18661
http://secunia.com/advisories/18717
http://securitytracker.com/id?1014845
https://exchange.xforce.ibmcloud.com/vulnerabilities/24064
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1345
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1566
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9717
http://support.avaya.com/elmodocs2/security/ASA-2006-016.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-033.htm
http://www.mandriva.com/security/advisories?name=MDKSA-2005:172