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ESB-2014.1181 - [Cisco] Cisco IOS XR Software: Denial of service - Remote/unauthenticated

Date: 17 July 2014

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1181
          Cisco Security Notice Cisco IOS XR Software MPLS Packet
                      Denial of Service Vulnerability
                               17 July 2014

===========================================================================

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

Product:           Cisco IOS XR Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3321  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3321

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Security Notice Cisco IOS XR Software MPLS Packet Denial of Service 
Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3321

CVE ID: CVE-2014-3321

Release Date: 2014 July 15 12:18 UTC (GMT)

Last Updated: 2014 July 15 18:30 UTC (GMT)

Related Documents:

Summary

A vulnerability in parsing crafted Multiprotocol Label Switching (MPLS) 
packets in Cisco IOS XR Software for ASR 9000 Series Aggregation Services 
Routers could allow an unauthenticated, adjacent attacker to cause a lockup 
and eventual reload of a network processor chip and a line card processing 
traffic.

The vulnerability is due to insufficient logic in parsing MPLS packets. An 
attacker could exploit this vulnerability by sending a stream of crafted MPLS
packets to be routed by a bridge-group virtual interface (BVI) on the affected
device. An exploit could allow the attacker to cause a lockup and eventual 
reload of a network processor chip and a line card, leading to a denial of 
service (DoS) condition.

Affected Products

Product 		More Information 	CVSS

Cisco IOS XR Software 	CSCuo91149 		5.7/4.7

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.

A stand-alone copy or paraphrase of the text of this document that omits the 
distribution URL is an uncontrolled copy, and may lack important information 
or contain factual errors.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
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                AusCERT personnel answer during Queensland business hours
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                On call after hours for member emergencies only.
===========================================================================
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