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

1) Input validation error

EUVDB-ID: #VU99327

Risk: High

CVSSv4.0: 6.6 [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/E:U/U:Amber]

CVE-ID: CVE-2024-20494

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper data validation during the TLS 1.3 handshake. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 7.2.0 - 9.20.3

Cisco Firepower Threat Defense (FTD): 7.2.0 - 9.20.3

CPE2.3

• 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:9.19.1.31:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.20.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.2.8.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.3.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.4.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:9.18.1.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:9.18.2.8:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXB

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.