Cisco Security Advisory: Cisco IOS Software Resource Reservation Protocol Interface Queue Wedge Vulnerability

[Cisco Systems Product Security Incident Response Team <psirt () cisco com>]

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Cisco IOS Software Resource Reservation Protocol Interface Queue Wedge Vulnerability

Advisory ID: cisco-sa-20130925-rsvp

Revision 1.0

For Public Release 2013 September 25 16:00  UTC (GMT)
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Summary
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A vulnerability in the Resource Reservation Protocol (RSVP) feature of Cisco IOS Software and Cisco IOS XE Software 
could allow an unauthenticated, remote attacker to trigger an interface queue wedge on the affected device.

The vulnerability is due to improper parsing of UDP RSVP packets. An attacker could exploit this vulnerability by 
sending UDP port 1698 RSVP packets to the vulnerable device. An exploit could cause Cisco IOS Software and Cisco IOS XE 
Software to incorrectly process incoming packets, resulting in an interface queue wedge, which can lead to loss of 
connectivity, loss of routing protocol adjacency, and other denial of service (DoS) conditions.
 
Cisco has released free software updates that address this vulnerability.

Workarounds that mitigate this vulnerability are available.

This advisory is available at the following link: 
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-rsvp

Note: The September 25, 2013, Cisco IOS Software Security Advisory bundled publication includes eight Cisco Security 
Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory 
lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as 
well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the September 2013 
bundled publication.

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled 
Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep13.html
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