Operating System:

[Cisco]

Published:

15 November 2013

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.1644
        Cisco IOS Software SSL VPN Interface Queue Wedge Denial of
                           Service Vulnerability
                             15 November 2013

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

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

Product:           Cisco IOS Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-6686  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6686

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Cisco Security Notice

Cisco IOS Software SSL VPN Interface Queue Wedge Denial of Service 
Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6686

CVE ID: CVE-2013-6686

Release Date: 2013 November 13 15:52 UTC (GMT)

Last Updated: 2013 November 13 20:19 UTC (GMT)

Related Documents:

Summary

A vulnerability in the Datagram Transport Layer Security (DTLS) function of 
the Cisco IOS Software SSL VPN feature could allow an authenticated, remote 
attacker to cause the SSL VPN gateway interface to stop processing traffic 
when the queue is full, resulting in a denial of service (DoS) condition.

The vulnerability is due to improper processing of specific DTLS packets. An 
attacker could exploit this vulnerability by creating an SSL session and then
sending crafted DTLS packets. An exploit could allow the attacker to cause the
SSL VPN gateway interface to become full, resulting in a DoS condition.

Affected Products

Product 	More Information 	CVSS

IOS 		CSCuh97409, CSCud90568 	6.8/5.6

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/en/US/products/products_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.

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