SB2023110150 - Denial of service in Cisco ASA AnyConnect SSL/TLS VPN
Published: November 1, 2023
Security Bulletin ID
SB2023110150
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Resource Shutdown or Release (CVE-ID: CVE-2023-20042)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error within the SSL/TLS session handling process in the AnyConnect SSL VPN feature. A remote attacker can send specially crafted SSL/TLS traffic to an affected device and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.