CVE-2016-2396
📋 TL;DR
This vulnerability allows remote authenticated users to execute arbitrary commands on Dell SonicWALL GMS, Analyzer, and UMA EM5000 systems through configuration input manipulation. Attackers with valid credentials can achieve remote code execution with high privileges. Organizations using affected versions without the hotfix are vulnerable.
💻 Affected Systems
- Dell SonicWALL GMS
- Dell SonicWALL Analyzer
- Dell SonicWALL UMA EM5000
📦 What is this software?
Analyzer by Sonicwall
Analyzer by Sonicwall
Analyzer by Sonicwall
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands with high privileges, potentially leading to data theft, lateral movement, or deployment of ransomware.
Likely Case
Authenticated attackers gaining shell access to the system, installing backdoors, stealing sensitive data, or using the system as a pivot point for further attacks.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring that detects unusual configuration changes.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained. The vulnerability is well-documented in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Hotfix 168056
Vendor Advisory: https://support.software.dell.com/product-notification/185943
Restart Required: Yes
Instructions:
1. Download Hotfix 168056 from Dell support portal. 2. Backup current configuration. 3. Apply the hotfix following Dell's installation guide. 4. Restart the affected services or system as required.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to GMS ViewPoint web application to trusted networks only
Authentication Hardening
allImplement strong authentication policies including MFA and regular credential rotation
🧯 If You Can't Patch
- Isolate affected systems from internet and restrict internal access to only necessary users
- Implement strict monitoring for unusual configuration changes or command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check system version in GMS web interface and verify if Hotfix 168056 is installedCheck Version:
Check via web interface: System > About or similar menuVerify Fix Applied:
Confirm Hotfix 168056 is listed in installed updates and version shows as patched📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes
- Command execution patterns in logs
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- Unusual outbound connections from GMS system
- Traffic to unexpected ports
SIEM Query:
source="gms-logs" AND (event="configuration_change" OR event="command_execution")🔗 References
- http://www.securitytracker.com/id/1035015
- http://www.zerodayinitiative.com/advisories/ZDI-16-164
- https://support.software.dell.com/product-notification/185943
- http://www.securitytracker.com/id/1035015
- http://www.zerodayinitiative.com/advisories/ZDI-16-164
- https://support.software.dell.com/product-notification/185943
