CVE-2025-3944
📋 TL;DR
This vulnerability allows attackers to manipulate files on systems running vulnerable versions of Tridium Niagara Framework or Niagara Enterprise Security on QNX. It affects organizations using these building automation and security management platforms with incorrect permission assignments for critical resources.
💻 Affected Systems
- Tridium Niagara Framework
- Tridium Niagara Enterprise Security
📦 What is this software?
Niagara by Tridium
Niagara by Tridium
Niagara by Tridium
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized file modification, configuration changes, or installation of malicious software on building automation systems.
Likely Case
Unauthorized file access and modification leading to system instability, data corruption, or privilege escalation.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Requires some level of access to the system. No public exploit code has been identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Niagara Framework and Enterprise Security versions 4.14.2u2, 4.15.u1, or 4.10u.11
Vendor Advisory: https://docs.niagara-community.com/category/tech_bull
Restart Required: Yes
Instructions:
1. Download the appropriate patch version from Tridium/Honeywell. 2. Backup current configuration and data. 3. Apply the patch following vendor instructions. 4. Restart the Niagara service or system. 5. Verify the patch was applied successfully.
🔧 Temporary Workarounds
Restrict File Permissions
linuxManually review and tighten file permissions on critical Niagara directories and files
chmod 750 /path/to/niagara/directories
chown niagara:niagara /path/to/niagara/files
Network Segmentation
allIsolate Niagara systems from untrusted networks and implement strict firewall rules
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach Niagara systems
- Monitor file system changes and unauthorized access attempts on Niagara directories
🔍 How to Verify
Check if Vulnerable:
Check the Niagara version via the web interface or configuration files. Compare against affected versions listed in the advisory.Check Version:
Check the NiagaraAbout.bog file or use the web interface at http://[niagara-ip]/station/versionVerify Fix Applied:
Verify the installed version matches the patched versions (4.14.2u2, 4.15.u1, or 4.10u.11) and test file permission assignments.📡 Detection & Monitoring
Log Indicators:
- Unauthorized file access attempts in Niagara logs
- File permission changes in system logs
- Unexpected file modifications in critical directories
Network Indicators:
- Unusual network traffic to Niagara systems from unauthorized sources
- Multiple failed authentication attempts followed by file access
SIEM Query:
source="niagara_logs" AND (event="file_access" OR event="permission_change") AND user NOT IN ["authorized_users"]