cisco-sa-20190327-c6500: Cisco IOS Software Catalyst 6500 Series 802.1x Authentication Bypass Vulnerability
First published: Wed Mar 27 2019(Updated: )
A vulnerability in 802.1x function of Cisco IOS Software on the Catalyst 6500 Series Switches could allow an unauthenticated, adjacent attacker to access the network prior to authentication. The vulnerability is due to how the 802.1x packets are handled in the process path. An attacker could exploit this vulnerability by attempting to connect to the network on an 802.1x configured port. A successful exploit could allow the attacker to intermittently obtain access to the network. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-c6500
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Puppet Cisco IOS | ||
| Cisco Catalyst 6500 Series Switches |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190327-c6500?
The severity of cisco-sa-20190327-c6500 is classified as high due to the potential for unauthorized access to the network.
How do I fix cisco-sa-20190327-c6500?
To fix cisco-sa-20190327-c6500, upgrade the affected Cisco IOS Software to a version that addresses the vulnerability.
Who is affected by cisco-sa-20190327-c6500?
Organizations using Cisco Catalyst 6500 Series Switches with vulnerable versions of Cisco IOS Software are affected by cisco-sa-20190327-c6500.
What type of attack is possible with cisco-sa-20190327-c6500?
cisco-sa-20190327-c6500 allows an unauthenticated, adjacent attacker to access the network before authentication.
What does the vulnerability cisco-sa-20190327-c6500 affect?
The vulnerability cisco-sa-20190327-c6500 specifically affects the handling of 802.1x packets in Cisco IOS Software.
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