CVE-2011-4016

Name of the Vulnerable Software and Affected Versions Cisco IOS versions 12.2, 15.0 through 15.2

Description The issue allows remote attackers to cause a denial of service, resulting in a device crash, via crafted network traffic when Point-to-Point Termination and Aggregation (PTA) and L2TP are used.

Recommendations For Cisco IOS version 12.2, update to a version that is not affected by this issue. For Cisco IOS versions 15.0 through 15.2, update to a version that is not affected by this issue. As a temporary workaround, consider disabling the use of PTA and L2TP until a patch is available.