OPERATIONAL DEFECT DATABASE
...
...
An ASR1K router acting as a L2TP Network Server (LNS) may crash when processing a mal-formed L2TP packet while using Event Tracer to monitor L2TP errors. The mal-formed L2TP packet can be as simple as a packet with a UDP checksum error.
The router must be configured as an LNS and must have Event Tracer enabled for L2TP. This can be done with the following commands: LNS(config)# logging monitor errors LNS# monitor event-trace l2tp enable LNS# monitor event-trace l2tp continuous LNS(config)# monitor event-trace l2tp size 250000
Do not use "monitor event-trace l2tp" in affected software versions.
None.
The Cisco PSIRT has evaluated this issue and determined that it does not have a security impact that requires PSIRT ownership or involvement. This issue will be addressed via normal resolution channels. There is no PSIRT restriction that prohibits making this bug visible. If you believe that there is new information that would cause a change in the severity of this issue, please contact psirt@cisco.com for another evaluation. Additional information on Cisco's security vulnerability policy can be found at the following URL: https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html
Click on a version to see all relevant bugs
Cisco Integration
Learn more about where this data comes from
Bug Scrub Advisor
Streamline upgrades with automated vendor bug scrubs
BugZero Enterprise
Wish you caught this bug sooner? Get proactive today.
