#VU8161 Authentication bypass in Cisco Catalyst 4000 Series Switches - CVE-2017-12213
Published: September 7, 2017
Vulnerability identifier: #VU8161
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-12213
CWE-ID: CWE-287
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Catalyst 4000 Series Switches
Cisco Catalyst 4000 Series Switches
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
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.
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
The vulnerability is addressed in the following versions: 15.2(6.3.30i)E, 15.2(6.3.0i)E, 15.2(6.2.6i)E, 15.2(6)E, 15.2(5.5.36i)E2, 15.2(5)E2, 15.2(2)E7, 3.6(7)E.