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TITLE:
Cisco Products TCP Implementation Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA36618

VERIFY ADVISORY:
http://secunia.com/advisories/36618/

DESCRIPTION:
Some vulnerabilities have been reported in multiple Cisco products,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

1) Multiple errors exist in the TCP implementation when processing
the state of a connection. These can be exploited to place TCP
connections in a long-lived state and consume a large amount of
resources.

This is related to vulnerability #1 in:
SA36597

2) An error in Cisco NX-OS for Nexus 5000 platforms can be exploited
to crash an affected system when processing a specially crafted
sequence of TCP packets.

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

SOLUTION:
Update to a fixed version. Please see the vendor's advisory for
detailed patch information.

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Robert E. Lee and Jack Louis of Outpost24.
2) Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20090908-tcp24.shtml

OTHER REFERENCES:
SA36597:
http://secunia.com/advisories/36597/

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