#VU99329 Input validation error in Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) - CVE-2024-20495
Vulnerability identifier: #VU99329
Vulnerability 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:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Hardware solutions /
Security hardware applicances
Cisco Firepower Threat Defense (FTD)
Hardware solutions /
Security hardware applicances
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of client key data after the TLS session is established within the Remote Access VPN feature. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Cisco Adaptive Security Appliance (ASA): 6.2.3.16 - 6.2.3.18, 6.4.0.8 - 6.4.0.18, 6.6.0 - 6.6.7.2, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.6.2, 7.1.0 - 7.1.0.3, 9.8.4.12 - 9.8.4.48, 9.12.3 - 9.17.1.39
Cisco Firepower Threat Defense (FTD): 6.2.3.16 - 6.2.3.18, 6.4.0.8 - 6.4.0.18, 6.6.0 - 6.6.7.2, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.6.2, 7.1.0 - 7.1.0.3, 9.8.4.12 - 9.8.4.48, 9.12.3 - 9.12.3.12, 9.12.4 - 9.12.4.67, 9.14.1 - 9.14.1.30, 9.14.2 - 9.14.2.15, 9.14.3 - 9.14.3.18, 9.14.4 - 9.14.4.24, 9.15.1 - 9.15.1.21, 9.16.1 - 9.16.1.28, 9.16.2 - 9.16.2.14, 9.16.3 - 9.16.3.23, 9.16.4 - 9.16.4.62, 9.17.1 - 9.17.1.39
External links
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-vpn-cZf8gT
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.
