CVE-2025-3495
📋 TL;DR
Delta Electronics COMMGR v1 and v2 use predictable session IDs due to insufficient randomization (CWE-338), allowing attackers to brute force authentication and execute arbitrary code. This affects industrial control systems using these versions of COMMGR software for device management. The vulnerability enables remote code execution with high impact on operational technology environments.
💻 Affected Systems
- Delta Electronics COMMGR
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, disrupt industrial processes, manipulate device configurations, and potentially cause physical damage or safety incidents.
Likely Case
Authentication bypass leading to unauthorized access to industrial control systems, configuration changes, data exfiltration, and potential disruption of manufacturing or infrastructure operations.
If Mitigated
Limited impact if systems are air-gapped, have strict network segmentation, and employ additional authentication layers, though the vulnerability remains present.
🎯 Exploit Status
The vulnerability is straightforward to exploit due to predictable session IDs. Attackers can brute force valid session IDs without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest version as specified in vendor advisory
Vendor Advisory: https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2025-00005_COMMGR%20-%20Insufficient%20Randomization%20Authentication%20Bypass_v1.pdf
Restart Required: Yes
Instructions:
Download the latest patch from Delta Electronics official website
Backup current configuration and data
Install the update following vendor instructions
Restart the COMMGR service
Verify successful installation
🔧 Temporary Workarounds
Network Segmentation
allIsolate COMMGR systems from untrusted networks and implement strict firewall rules
Access Control Restrictions
allImplement additional authentication layers and restrict access to authorized IP addresses only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate COMMGR systems from all untrusted networks
- Deploy additional authentication mechanisms and monitor for brute force attempts on session IDs
🔍 How to Verify
Check if Vulnerable:
Check COMMGR version against affected versions (v1 or v2). Review system logs for authentication bypass attempts.Check Version:
Check COMMGR application version through the software interface or configuration filesVerify Fix Applied:
Verify installation of latest patch version from vendor advisory. Test session ID generation for proper randomization.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login
- Unusual session ID patterns or predictable sequences
- Access from unexpected IP addresses
Network Indicators:
- Unusual traffic patterns to COMMGR ports
- Brute force attempts against authentication endpoints
- Unexpected remote connections to industrial control systems
SIEM Query:
source="COMMGR" AND (event_type="authentication" AND result="success" AND count>threshold) OR (session_id MATCHES predictable_pattern)