Products
Cisco Adaptive Security Appliance (ASA) Software
Cisco Firepower Threat Defense (FTD) Software
Source
ykramarz@cisco.com
Tags
CVE-2024-20355 details
Last Modified : May 22, 2024, 6:59 p.m.
Description
A vulnerability in the implementation of SAML 2.0 single sign-on (SSO) for remote access VPN services in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to successfully establish a VPN session on an affected device. This vulnerability is due to improper separation of authorization domains when using SAML authentication. An attacker could exploit this vulnerability by using valid credentials to successfully authenticate using their designated connection profile (tunnel group), intercepting the SAML SSO token that is sent back from the Cisco ASA device, and then submitting the same SAML SSO token to a different tunnel group for authentication. A successful exploit could allow the attacker to establish a remote access VPN session using a connection profile that they are not authorized to use and connect to secured networks behind the affected device that they are not authorized to access. For successful exploitation, the attacker must have valid remote access VPN user credentials.
CVSS Score
1 | 2 | 3 | 4 | 5.0 | 6 | 7 | 8 | 9 | 10 |
---|
Weakness
Weakness | Name | Description |
---|
CVSS Data
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Base Score
5.0
Exploitability Score
Impact Score
Base Severity
MEDIUM
Vector String : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
References
URL | Source |
---|---|
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-bypass-KkNvXyKW | ykramarz@cisco.com |