Rule:--Sid:1327--Summary:Secure Shell (SSH) is used to remotely manage systems over encrypted TCPsessions. This event is generated when an attempt is made to exploit vulnerable versions of the SSH daemon.--Impact:System compromize presenting the attacker with root privileges. Denial of Service (DoS) on certain network devices.--Detailed Information:A flaw in the CRC32 compensation attack detection code may result in arbitrary code execution with the privileges of the user running the SSHdaemon (usually root).Some Netscreen devices may suffer a Denial of Service.Affected Systems:	OpenSSH versions prior to 2.2	Multiple Cisco network devices	Multiple Netscreen network devices	SSH Secure Communications prior to 1.2.31--Attack Scenarios:The attacker would need to send specially crafted large SSH packets to cause the overflow and present the opportunity to write values to memorylocations.Exploit scripts are available--Ease of Attack:Simple. Exploits are available.--False Positives:None Known--False Negatives:None Known--Corrective Action:Upgrade to the latest non-affected version of the software.Apply the appropriate vendor supplied patches.--Contributors:Original rule writer unknownSourcefire Research TeamNigel Houghton <nigel.houghton@sourcefire.com>--Additional References:CERT:http://www.kb.cert.org/vuls/id/945216Analysis by David Dittrich:http://staff.washington.edu/dittrich/misc/ssh-analysis.txt--