SB2017090718 - Authentication bypass in Cisco Catalyst 4000 Series Switches
Published: September 7, 2017
Security Bulletin ID
SB2017090718
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Authentication bypass (CVE-ID: CVE-2017-12213)
The vulnerability allows an physical adjacent attacker to bypass authentication on the target system.The weakness exists in the dynamic access control list (ACL) feature due to an uncaught error condition that may occur during the reassignment of the auth-default-ACL dynamic ACL to a switch port. A remote attacker can bypass 802.1x authentication and cause dynamic ACL assignment to fail and the port to fail open.
Remediation
Install update from vendor's website.