CVE-2018-17888
📋 TL;DR
CVE-2018-17888 allows attackers to obtain active session IDs in NUUO CMS, potentially leading to remote code execution. This affects all versions 3.1 and prior of NUUO CMS, which is video management software used in physical security systems.
💻 Affected Systems
- NUUO CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the CMS server, accessing video feeds, and potentially pivoting to other systems.
Likely Case
Unauthorized access to video surveillance systems, data exfiltration, and disruption of security monitoring operations.
If Mitigated
Limited impact with proper network segmentation and access controls preventing lateral movement.
🎯 Exploit Status
Session ID exposure leads to authentication bypass, making RCE straightforward once session is hijacked.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.3 or later
Vendor Advisory: https://ics-cert.us-cert.gov/advisories/ICSA-18-284-02
Restart Required: Yes
Instructions:
1. Download NUUO CMS version 3.3 or later from vendor portal. 2. Backup current configuration. 3. Install updated version. 4. Restart CMS service. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate NUUO CMS from internet and restrict access to trusted networks only
Firewall Rules
windowsImplement strict firewall rules to limit access to CMS ports (default 5250)
netsh advfirewall firewall add rule name="Block NUUO CMS" dir=in action=block protocol=TCP localport=5250
🧯 If You Can't Patch
- Implement strict network segmentation and access controls
- Monitor for unusual authentication patterns and session activity
🔍 How to Verify
Check if Vulnerable:
Check CMS version in web interface or via registry: HKEY_LOCAL_MACHINE\SOFTWARE\NUUO\CMS\VersionCheck Version:
reg query "HKLM\SOFTWARE\NUUO\CMS" /v VersionVerify Fix Applied:
Confirm version is 3.3 or higher and test session management functionality📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from different IP
- Unusual session creation patterns
- Access to administrative functions from unexpected sources
Network Indicators:
- Traffic to CMS port 5250 from untrusted networks
- Unusual outbound connections from CMS server
SIEM Query:
source="nuuo_cms.log" AND (event="session_hijack" OR event="admin_access" from_ip NOT IN trusted_ips)