Cisco Bug: CSCuw20424 - CAT6K:Layer 2 (L2) packet not dropped on length mismatch
Feb 25, 2018
- Cisco Catalyst 6000 Series Switches
Known Affected Releases
Symptom: The Cisco Catalyst Ethernet driver fails to properly drop a Layer 2 (L2) frame that should be evaluated as invalid. The L2 frame will be flooded to all active ports on the associated VLAN due to a failure to match to a known Media Access Control (MAC) in the Cisco Access Manager (CAM) table. This could allow the attacker to perform a traffic amplification attack to consume bandwidth on all ports associated with the VLAN of the receiving port. Conditions: Device running with default configuration running an affected version of software.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases