A vulnerability has been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the RSVP feature and can be exploited to e.g. cause a loss in connectivity via crafted RSVP packets.
Successful exploitation requires that the device is configured with VPN routing and forwarding (VRF) instances, none of the VRF instances have RSVP enabled, but at least one other interface has, and knowledge of the affected infrastructure.
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.
Original Advisory: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-rsvp
Do you have additional information related to this advisory?
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Subject: Cisco IOS RSVP Denial of Service Vulnerability
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