Cisco Security Notice

Cisco IOS Software Tunneled Traffic Queue Wedge Denial of Service Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4620
CVE ID: CVE-2012-4620
Release Date: 2012 August 12 19:04  UTC (GMT)
Last Updated: 2012 August 12 19:04  UTC (GMT)
Related Documents:      

Summary

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted device.

The vulnerability is due to improper handling of IP tunneled ingress traffic by the Cisco IOS Software. An unauthenticated, remote attacker could exploit this vulnerability by sending Generic Routing Encapsulation IP (GRE/IP), IP in IP (IPIP), or IPv4 encapsulated IPv6 packets, which terminate at the device, to a device with a vulnerable tunnel configuration. Successful exploitation could allow the attacker to cause the affected device to stop responding to legitimate IP tunnel traffic on an affected interface, resulting in a DoS condition.

Affected Products

ProductMore InformationCVSS
Cisco IOS softwareCSCts668087.8/6.4

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.

View the Cisco Security Advisory Cisco Security Advisory   View the Cisco IPS Signature Cisco IPS Signature   View the Alerts Alerts
 
Download this document (PDF)
View Printable Version