CVE-2024-11639: Ivanti CSA Auth Bypass Vulnerability

CVE-2024-11639 Overview

An authentication bypass in the admin web console of Ivanti CSA before version 5.0.3 allows a remote unauthenticated attacker to gain administrative access.

Critical Impact

This vulnerability allows complete administrative control to unauthorized users.

Affected Products

• Ivanti Cloud Services Appliance

Discovery Timeline

• Not Available - Vulnerability discovered by Not Available
• Not Available - Responsible disclosure to Ivanti
• Not Available - CVE CVE-2024-11639 assigned
• Not Available - Ivanti releases security patch
• 2024-12-10 - CVE CVE-2024-11639 published to NVD
• 2025-01-17 - Last updated in NVD database

Technical Details for CVE-2024-11639

Vulnerability Analysis

The vulnerability is due to improper validation of user access requests, allowing attackers to bypass authentication checks and obtain admin-level control.

Root Cause

The underlying issue is a missing validation mechanism in user authentication processes, failing to enforce role-based access control.

Attack Vector

Network-based attackers can exploit this by interacting with the admin web console over the network.

# Example exploitation code (sanitized)
curl -X POST \  
  https://victim.example.com/admin \  
  -d '{"username":"admin","password":"wrongpassword"}'

Detection Methods for CVE-2024-11639

Indicators of Compromise

• Unusual login attempts from unknown IP addresses
• Modifications in administrative settings without authorized logs
• Anomalous activities following failed login attempts

Detection Strategies

Utilize network intrusion detection systems (NIDS) to monitor for suspicious login attempts and unauthorized access patterns.

Monitoring Recommendations

Continuously audit access logs for administrative console interactions and validate IP addresses against threat intelligence feeds.

How to Mitigate CVE-2024-11639

Immediate Actions Required

• Update to Ivanti CSA version 5.0.3 or later
• Restrict network access to the admin console
• Reinforce multi-factor authentication mechanisms

Patch Information

Ivanti has released patches which address this vulnerability in version 5.0.3, details available in their Security Advisory.

Workarounds

Implement strict firewall rules to limit access to trusted IP ranges and enhance logging mechanisms to detect unauthorized access attempts.

# Configuration example
iptables -A INPUT -p tcp -s [Trusted-IP-Range] --dport 80 -j ACCEPT