cisco-sa-c2960L-DpWA9Re4: Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass Vulnerability
First published: Wed Jun 03 2020(Updated: )
A vulnerability in the 802.1X feature of Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches could allow an unauthenticated, adjacent attacker to forward broadcast traffic before being authenticated on the port. The vulnerability exists because broadcast traffic that is received on the 802.1X-enabled port is mishandled. An attacker could exploit this vulnerability by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c2960L-DpWA9Re4
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Catalyst 2960-L Series | ||
| Cisco Catalyst Digital Building Series Switches |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-c2960L-DpWA9Re4?
The severity of cisco-sa-c2960L-DpWA9Re4 is classified as high due to the potential for unauthorized network access.
How do I fix cisco-sa-c2960L-DpWA9Re4?
To fix cisco-sa-c2960L-DpWA9Re4, apply the necessary software updates provided by Cisco for the affected devices.
What devices are affected by cisco-sa-c2960L-DpWA9Re4?
cisco-sa-c2960L-DpWA9Re4 affects Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches.
What type of attack does cisco-sa-c2960L-DpWA9Re4 facilitate?
cisco-sa-c2960L-DpWA9Re4 facilitates unauthorized broadcast traffic forwarding by unauthenticated adjacent attackers.
Is user authentication bypass possible with cisco-sa-c2960L-DpWA9Re4?
Yes, cisco-sa-c2960L-DpWA9Re4 allows unauthenticated users to bypass authentication and send broadcast traffic.
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- canonical/cisco catalyst digital building series switches