CVE-2006-4924
sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.
Date published : 2006-09-26
http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html