SB2023091418 - ACL Bypass in Cisco IOS XR Software
Published: September 14, 2023
Security Bulletin ID
SB2023091418
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 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-20190)
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.