Unspecified vulnerability in portable OpenSSH before 4.4, when running on some platforms, allows remote attackers to determine the validity of usernames via unknown vectors involving a GSSAPI "authentication abort."
http://docs.info.apple.com/article.html?artnum=305214
http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html
http://marc.info/?l=openssh-unix-dev&m=115939141729160&w=2
http://rhn.redhat.com/errata/RHSA-2006-0697.html
http://secunia.com/advisories/22158
http://secunia.com/advisories/22173
http://secunia.com/advisories/22495
http://secunia.com/advisories/22823
http://secunia.com/advisories/24479
http://secunia.com/advisories/27588
http://secunia.com/advisories/28320
http://security.gentoo.org/glsa/glsa-200611-06.xml
http://securitytracker.com/id?1016939
https://exchange.xforce.ibmcloud.com/vulnerabilities/29255
https://issues.rpath.com/browse/RPL-681
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10178
http://support.avaya.com/elmodocs2/security/ASA-2007-527.htm
http://www.novell.com/linux/security/advisories/2006_62_openssh.html
http://www.redhat.com/support/errata/RHSA-2007-0540.html
http://www.redhat.com/support/errata/RHSA-2007-0703.html