Missing Release of Resource after Effective Lifetime in Cisco Firewall Threat Defense (FTD) and Cisco Adaptive Security Appliance (ASA) - CVE-2024-20493

Vulnerability identifier: #VU99328

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-20493

CWE-ID: CWE-772

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to ineffective handling of memory resources during the authentication process within the login authentication functionality of the Remote Access SSL VPN feature. A remote attacker can cause a denial of service condition on the target system.

Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)

Install updates from vendor's website.

Cisco Firewall Threat Defense (FTD) - addressed in versions 7.0.6.3, 7.2.9, 7.4.2.1, 7.6.0, 9.16.4.67, 9.16.4.70, 9.16.4.71, 9.17.1.45, 9.18.4.40, 9.18.4.47, 9.19.1.37, 9.20.3, 9.20.3.4, 9.20.3.7, 9.22.1.1
Cisco Adaptive Security Appliance (ASA) - addressed in versions 7.0.6.3, 7.2.9, 7.4.2.1, 7.6.0, 9.16.4.67, 9.16.4.70, 9.16.4.71, 9.17.1.45, 9.18.4.40, 9.18.4.47, 9.19.1.37, 9.20.3, 9.20.3.4, 9.20.3.7, 9.22.1.1

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-vpn-4gYEWMKg

• Denial of service in Cisco Adaptive Security Appliance and Firepower Threat Defense Software