Missing Authorization in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2024-20355
Published: May 27, 2024
Vulnerability identifier: #VU89822
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2024-20355
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass authorization.
The vulnerability exists due to an error in the implementation of SAML 2.0 single sign-on (SSO) for remote access VPN services. A remote authenticated user can establish a VPN connection using their designated connection profile (tunnel group), then intercept the SAML SSO token that is sent back from the Cisco ASA device, and use this token to a different tunnel group for authentication.
Affected software
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Cisco Firewall Threat Defense (FTD)
How to mitigate CVE-2024-20355
Install updates from vendor's website.
Cisco Adaptive Security Appliance (ASA) - addressed in versions 6.4.0.17, 9.16.4.27, 9.17.1.33, 9.18.3.46, 9.18.4, 9.19.1.12, 9.20.1, 9.20.2
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.4.0.17, 7.0.6, 7.2.4.1, 7.2.5, 7.2.6, 7.2.7, 7.4.0, 7.4.1
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.4.0.17, 7.0.6, 7.2.4.1, 7.2.5, 7.2.6, 7.2.7, 7.4.0, 7.4.1