SB2023091418 - ACL Bypass in Cisco IOS XR Software
Published: September 14, 2023
Security Bulletin ID
SB2023091418
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-20190)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 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:Green
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.
Remediation
Install update from vendor's website.