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ESB-2014.0618 - [Cisco] Cisco IOS XE: Denial of service - Existing account

Date: 30 April 2014

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0618
         Cisco IOS XE Software Malformed L2TP Packet Vulnerability
                               30 April 2014

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

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

Product:           Cisco IOS XE
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-2183  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2183

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

Cisco Security Notice

Cisco IOS XE Software Malformed L2TP Packet Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2183

CVE ID: CVE-2014-2183

Release Date: 2014 April 28 14:39 UTC (GMT)

Last Updated: 2014 April 28 16:44 UTC (GMT)

Related Documents:

Summary

A vulnerability in the Layer 2 Tunneling Protocol (L2TP) module of Cisco IOS 
XE on Cisco ASR 1000 Series Routers could allow an authenticated, remote 
attacker to cause a reload of the processing ESP card.

The vulnerability occurs during the processing of a malformed L2TP packet. An
attacker could exploit this vulnerability by sending malformed L2TP packets 
over an established L2TP session. An exploit could allow the attacker to cause
a reload of the affected ESP card.

Affected Products

Product 		More Information 	CVSS

Cisco IOS XE Software 	CSCun09973 		6.3/5.2

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
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
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                On call after hours for member emergencies only.
===========================================================================
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