Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response authentication (ChallengeResponseAuthentication) when OpenSSH is using SKEY or BSD_AUTH authentication.
http://marc.info/?l=bugtraq&m=102514371522793&w=2
http://marc.info/?l=bugtraq&m=102514631524575&w=2
http://marc.info/?l=bugtraq&m=102521542826833&w=2
https://web.archive.org/web/20080622172542/www.iss.net/threats/advise123.html