CVE-2024-21888
📋 TL;DR
This vulnerability allows authenticated users of Ivanti Connect Secure and Ivanti Policy Secure to escalate their privileges to administrator level. It affects all users of these products with standard user accounts. Attackers can gain full administrative control over the affected systems.
💻 Affected Systems
- Ivanti Connect Secure
- Ivanti Policy Secure
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise where attackers gain administrative access, can modify configurations, access sensitive data, deploy malware, and pivot to internal networks.
Likely Case
Privileged attackers or compromised standard user accounts gain administrative privileges to steal credentials, modify VPN configurations, or establish persistence.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring that detects privilege escalation attempts.
🎯 Exploit Status
Requires authenticated user access but exploitation is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Ivanti Connect Secure 9.1R18.5, 9.1R17.5, 22.6R1.2 and later; Ivanti Policy Secure 22.6R1.2 and later
Vendor Advisory: https://forums.ivanti.com/s/article/CVE-2024-21888-Privilege-Escalation-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure
Restart Required: Yes
Instructions:
1. Download the latest patch from Ivanti support portal. 2. Apply the patch following Ivanti's upgrade documentation. 3. Restart the affected services. 4. Verify the patch was applied successfully.
🔧 Temporary Workarounds
Restrict User Access
allLimit standard user accounts to only essential personnel and implement strong authentication controls.
Network Segmentation
allIsolate Ivanti appliances from critical internal networks to limit lateral movement.
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the Ivanti web interface
- Enable detailed logging and monitoring for privilege escalation attempts and review logs daily
🔍 How to Verify
Check if Vulnerable:
Check your Ivanti appliance version via the web admin interface or CLI. If running affected versions (9.x or 22.x before patched versions), you are vulnerable.Check Version:
From CLI: show version or via web interface: System > Maintenance > Version InformationVerify Fix Applied:
Verify the appliance version matches or exceeds the patched versions listed in the vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege changes in audit logs
- Multiple failed login attempts followed by successful admin access
- User accounts accessing admin functions
Network Indicators:
- Unusual authentication patterns to the web interface
- Administrative API calls from non-admin IP addresses
SIEM Query:
source="ivanti*" AND (event_type="privilege_escalation" OR user_role_change="admin")