Improper Resource Shutdown or Release in Cisco Adaptive Security Appliance (ASA) - CVE-2023-20042
Published: November 1, 2023
Vulnerability identifier: #VU82663
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-20042
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Cisco Adaptive Security Appliance (ASA)
How to mitigate CVE-2023-20042
Install updates from vendor's website.
Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.16.4.14, 9.17.1.30, 9.18.2.8, 9.18.3, 9.18.4, 9.19.1.5, 9.20.1