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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
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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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