Cisco Security Advisory: Cisco IOS XR Software Route Processor Denial of Service Vulnerability

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

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Cisco IOS XR Software Route Processor Denial of Service Vulnerability

Advisory ID: cisco-sa-20131023-iosxr

Revision 1.0

For Public Release 2013 October 23 16:00  UTC (GMT)
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Summary
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Cisco IOS XR Software contains a vulnerability when handling fragmented packets that may result in a denial of service 
condition of the Cisco CRS Route Processor cards listed under "Affected Products".  The vulnerability affects IOS XR 
Software versions 3.3.0 to 4.2.0

The vulnerability is a result of improper handing of fragmented packets and could cause the route processor, which 
processes the packets, to be unable to transmit packets to the fabric.

Customers that are running version 4.2.1 or later of Cisco IOS XR Software, or that have previously installed the SMU 
for CSCtz62593 are not affected by this vulnerability.

Cisco has released free software updates that address these vulnerabilities.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-iosxr

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