Cisco IOS XR: Denial of Service -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1511
Cisco IOS XR Software Malformed IPv6 Packet Denial of Service Vulnerability
                             4 September 2014

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

Product:           Cisco IOS XR
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3353  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3353

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Cisco Security Notice

Cisco IOS XR Software Malformed IPv6 Packet Denial of Service Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3353

CVE ID: CVE-2014-3353

Release Date: 2014 September 2 13:27 UTC (GMT)

Last Updated: 2014 September 2 19:26 UTC (GMT)

Related Documents:

Summary

A vulnerability in the ICMPv6 client library of Cisco IOS XR Software for the
Cisco Carrier Routing System (CRS) could allow an unauthenticated, remote 
attacker to cause high CPU utilization on a line card of the Cisco CRS, and 
certain IPv6 traffic to the affected device could be dropped.

The vulnerability is due to improper processing of malformed IPv6 packets. An
attacker could exploit this vulnerability by sending a malformed IPv6 packet 
to be processed when IPv6 is configured on an affected device. An exploit 
could allow the attacker to cause high CPU utilization on a line card of the 
Cisco CRS, and certain IPv6 traffic to the affected device could be dropped.

Affected Products

Product 		More Information 	CVSS

Cisco IOS XR Software 	CSCuo95165 		5.0/4.1

What Is a Cisco Security Notice?

The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco 
Security Notices to inform customers of low- to mid-level severity security 
issues involving Cisco products.

Customers who wish to upgrade to a software version that includes fixes for 
these issues should contact their normal support channels. Free software 
updates will not be provided for issues that are disclosed through a Cisco 
Security Notice.

For additional information about Cisco PSIRT publications, see the Cisco 
Security Vulnerability Policy at 
http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html

Customers Using Third-Party Support Organizations

Customers may have Cisco products that are provided or maintained through 
prior or existing agreements with third-party support organizations, such as 
Cisco Partners, authorized resellers, or service providers. For these 
products, customers should consult their service providers or support 
organizations to ensure that any applied workaround or fix is the most 
appropriate in the intended network before it is deployed.

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF 
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO 
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

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