Cisco ASA: CVE-2023-20264: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SAML Assertion Hijack Vulnerability

Cisco ASA: CVE-2023-20264: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SAML Assertion Hijack Vulnerability

Severity

6

CVSS

(AV:N/AC:L/Au:N/C:P/I:P/A:N)

Published

11/01/2023

Created

11/10/2023

Added

11/08/2023

Modified

01/22/2025

Description

A vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 single sign-on (SSO) for remote access VPN in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to intercept the SAML assertion of a user who is authenticating to a remote access VPN session. This vulnerability is due to insufficient validation of the login URL. An attacker could exploit this vulnerability by persuading a user to access a site that is under the control of the attacker, allowing the attacker to modify the login URL. A successful exploit could allow the attacker to intercept a successful SAML assertion and use that assertion to establish a remote access VPN session toward the affected device with the identity and permissions of the hijacked user, resulting in access to the protected network.

Solution(s)

• cisco-asa-update-latest

References

• https://attackerkb.com/topics/cve-2023-20264
• CVE - 2023-20264
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-hijack-ttuQfyz
• cisco-sa-asaftd-saml-hijack-ttuQfyz