SB2023110244 - Improper Certificate Validation in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software
Published: November 2, 2023
Security Bulletin ID
SB2023110244
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) Improper Certificate Validation (CVE-ID: CVE-2023-20247)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 improper error handling during remote access VPN authentication. A remote user can send a specially crafted request and bypass the configured multiple certificate authentication policy while retaining the privileges and permissions associated with the original connection profile.
Remediation
Install update from vendor's website.