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
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2024-20355
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
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.
Remediation
Install updates from vendor's website.