Permissions, Privileges, and Access Controls in Cisco IOS XR - CVE-2023-20190
Published: September 14, 2023
Vulnerability identifier: #VU80769
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2023-20190
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to incorrect destination address range encoding in the compression module in the classic access control list (ACL) compression feature. A remote attacker can bypass configured ACL protections and access trusted networks that the device might be protecting.
Affected software
Cisco IOS XR
How to mitigate CVE-2023-20190
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 7.3.5, 7.5.4, 7.8.2, 7.9.1