Warpgate SSO Flow Vulnerability Allowing Cross-Site Request Forgery

A vulnerability in Warpgate prior to version 0.23.3 allows for cross-site request forgery (CSRF) attacks in the single sign-on (SSO) flow. The issue arises because the SSO flow does not validate the 'state' parameter, enabling an attacker to trick a user into logging into the attacker's account. This could lead to the user unintentionally performing sensitive actions on behalf of the attacker, such as transmitting confidential information to the attacker's SSH target or accessing an HTTP target set up by the attacker.

Impact

Exploitation of this vulnerability allows for cross-site request forgery attacks, where a user is manipulated into logging into an attacker's account, potentially leading to unauthorized actions being performed on behalf of the attacker.

Reproduction

To reproduce this vulnerability, an attacker can create a fake website that mimics the login process of a company. By setting up an HTTP target in Warpgate that resembles an internal company resource, the attacker can use a CSRF attack to trick an employee into logging into the attacker's account. Once logged in, the employee can be directed to the HTTP target, where their credentials can be harvested.

Remediation

Users can upgrade to Warpgate version 0.23.3 or later, where this vulnerability has been fixed.