Two vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerabilities are caused due to unspecified errors in the H.323 implementation, which can be exploited to trigger a device reload or lead to an interface queue wedge via specially crafted H.323 packets.
Successful exploitation requires a complete TCP three-way handshake, and that H.323 voice services are enabled.
Solution: Update to the fixed version (please see the vendor's advisories for details).
Provided and/or discovered by: Reported by the vendor.
Original Advisory: http://www.cisco.com/warp/public/707/cisco-sa-20100324-h323.shtml
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Subject: Cisco IOS H.323 Two Denial of Service Vulnerabilities
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