Citrix Gateway & Cloud - Session Validation Vulnerability

Document Title:
===============
Citrix Gateway & Cloud - Session Validation Vulnerability


References:
===========
https://www.vulnerability-lab.com/get_content.php?id=2325

Security Video: (Cloud)
https://www.youtube.com/watch?v=vObgOpGpCSM

Security Video: (OnPrem)
https://www.youtube.com/watch?v=RFjRgiW2OWE

Advisory: https://www.vulnerability-lab.com/get_content.php?id=2324

Vulnerability Magazine: https://www.vulnerability-db.com/?q=articles/2023/07/03/citrix-gateway-cloud-mfa-insufficient-session-validation-vulnerability



Release Date:
=============
2023-07-02


Vulnerability Laboratory ID (VL-ID):
====================================
2325


Common Vulnerability Scoring System:
====================================
5


Vulnerability Class:
====================
Insufficient Session Validation


Current Estimated Price:
========================
2.000€ - 3.000€


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a web vulnerability in the official Citrix Gateway (ADC/NetScaler) 13.0 & 13.1 web-application, Cloud and AAA Feature.


Vulnerability Disclosure Timeline:
==================================
2023-07-03: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Authentication Type:
====================
Restricted Authentication (User Privileges)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Responsible Disclosure


Technical Details & Description:
================================
An insufficient session validation web vulnerability was discovered in the Citrix Gateway (ADC/NetScaler) 13.0 & 13.1 web-application, Cloud and AAA Feature.
The security vulnerability allows remote attackers to bypass the mfa function by hijacking the session data of an active user (non expired session) to followup 
with further compromising attacks.


Credits & Authors:
==================
Lars Guenther - https://www.vulnerability-lab.com/show.php?user=L.+Guenther
Benjamin Mejri (Kunz) - https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.


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=========================
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