Operating System:

[Cisco]

Published:

24 October 2013

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.1522
   Cisco IOS XR Software Route Processor Denial of Service Vulnerability
                              24 October 2013

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco CRS-1 Distributed Route Processor
                   Cisco CRS-1 16-Slot Line-Card Chassis Route Processor
                   Cisco CRS-1 8-Slot Line-Card Chassis Route Processor
                   Cisco CRS-1 16-Slot Line Card Chassis Route Processor B
                   Cisco CRS Series 4/8-Slot Line Card Chassis Performance Route Processor (12 GB)
                   Cisco CRS Series 4/8-Slot Line Card Chassis Performance Route Processor (6 GB)
                   Cisco CRS Series 16-Slot Performance Route Processor (12 GB)
                   Cisco CRS Series 16-Slot Performance Route Processor (6 GB)
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-5549  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-iosxr

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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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