CVE-2013-1147 Information

Description

The Protocol Translation (PT) functionality in Cisco IOS 12.3 through 12.4 and 15.0 through 15.3 when one-step port-23 translation or a Telnet-to-PAD ruleset is configured does not properly validate TCP connection information which allows remote attackers to cause a denial of service (device reload) via an attempted connection to a PT resource aka Bug ID CSCtz35999.

Reference

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130327-pt