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

1) Missing Release of Resource after Effective Lifetime

EUVDB-ID: #VU99328

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20493

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 6.2.3 - 9.20.2.22

Cisco Firepower Threat Defense (FTD): 6.2.3 - 9.20.2.22

CPE2.3

• cpe:2.3:h:cisco_systems:asa:6.2.3.18:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:6.4.0.18:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:6.6.7.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:6.7.0.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:7.0.6.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:7.1.0.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:7.2.8.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:7.3.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:7.4.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.8.4.48:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:6.2.3.18:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.