CVE-2023-25589
📋 TL;DR
An unauthenticated remote attacker can create arbitrary administrative users on ClearPass Policy Manager's web interface, leading to complete cluster compromise. This affects all organizations using vulnerable versions of ClearPass Policy Manager with internet-facing management interfaces.
💻 Affected Systems
- Aruba ClearPass Policy Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Total cluster compromise allowing attacker to create admin accounts, access all network authentication data, modify policies, and potentially pivot to other systems.
Likely Case
Attacker creates persistent admin accounts to maintain access, exfiltrate sensitive authentication data, and disrupt network access control.
If Mitigated
Limited impact if management interface is not internet-facing and network segmentation prevents lateral movement from compromised system.
🎯 Exploit Status
Unauthenticated remote code execution with CVSS 9.8 suggests trivial exploitation. No public PoC but high likelihood of weaponization given severity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.10.7, 6.9.12, and later versions
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2023-003.txt
Restart Required: Yes
Instructions:
1. Download appropriate patch version from Aruba support portal. 2. Backup current configuration. 3. Apply patch via ClearPass web interface or CLI. 4. Restart ClearPass services. 5. Verify patch installation and functionality.
🔧 Temporary Workarounds
Network Isolation
allRestrict access to ClearPass management interface to trusted IPs only
Configure firewall rules to allow only specific source IPs to TCP ports 443, 22 (management interfaces)
Interface Disablement
linuxDisable web management interface if not required
systemctl stop clearpass-web
chkconfig clearpass-web off
🧯 If You Can't Patch
- Immediately restrict network access to ClearPass management interface using firewall rules
- Implement network segmentation to isolate ClearPass from other critical systems
🔍 How to Verify
Check if Vulnerable:
Check ClearPass version via web interface (Admin > Support > About) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Verify version is 6.10.7, 6.9.12 or later, and test that unauthenticated user creation is no longer possible📡 Detection & Monitoring
Log Indicators:
- Unexpected user account creation events
- Authentication attempts from unknown IPs to management interface
- Failed login attempts followed by successful admin actions
Network Indicators:
- Unusual outbound connections from ClearPass server
- Traffic to management interface from unexpected sources
- Port scanning against ClearPass management ports
SIEM Query:
source="clearpass" AND (event_type="user_created" OR auth_result="success") AND src_ip NOT IN [trusted_ips]