Multiple vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) An error in the NAT translation of NetMeeting Directory (LDAP) packets can be exploited to cause a device to reload via specially crafted packets sent to TCP port 389.

2) An error in the NAT translation of SIP packets over TCP can be exploited to cause a device to reload via specially crafted packets sent to TCP port 5060

3) An error in the NAT translation of SIP packets over UDP can be exploited to cause a device to reload via specially crafted packets sent to UPD port 5060

Successful exploitation of this vulnerability requires a MPLS enabled device.

4) An error in the NAT translation of SIP packets over UDP can be exploited to cause a device to reload via specially crafted packets sent to UPD port 5060

5) A memory leak error in the NAT translation of SIP packets over UDP can be exploited to exhaust memory via specially crafted packets sent to UDP port 5060.

6) An error in the NAT translation of H.323 packets can be exploited to cause a device to reload via specially crafted packets sent to TCP port 1720.

7) An error when processing Link Layer Discovery Protocol (LLDP) ethernet frames can be exploited to cause a device crash via a specially crafted frame containing more than 10 Management Address (MA) TLVs.

This vulnerability affects versions prior to 12.2(33)SXJ1 only.

Please see the vendor's advisory for a list of affected versions.

Solution
Update to a fixed version (please see the vendor's advisory for details).

Provided and/or discovered by
Reported by the vendor.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20110928-nat.shtml
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/release/notes/caveats_SXJ.html#wp4802933

Deep Links
Links available to Secunia VIM customers