Improper access control in Cisco Systems, Inc products - CVE-2023-20191

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Main Vulnerability Database Vulnerabilities #VU80767

Improper access control in Cisco Systems, Inc products - CVE-2023-20191

Published: September 14, 2023


Vulnerability identifier: #VU80767
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-20191
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XR
NCS 5700 Series Routers
Cisco Network Convergence System 540 Series Routers
NCS5500
NCS560
IOS XR White box

Detailed vulnerability description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to incomplete support in the access control list (ACL) processing on MPLS interfaces in the ingress direction. A remote attacker can bypass an ACL on the affected device.


How to mitigate CVE-2023-20191

Install updates from vendor's website.

Sources