CVE-2021-44005
📋 TL;DR
This vulnerability allows remote code execution through specially crafted TIFF files in Siemens JT2Go and Teamcenter Visualization software. Attackers can exploit an out-of-bounds write vulnerability in Tiff_Loader.dll to execute arbitrary code with the privileges of the current process. Organizations using affected versions of these Siemens products are at risk.
💻 Affected Systems
- Siemens JT2Go
- Siemens Teamcenter Visualization
📦 What is this software?
Jt2go by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the application user, potentially leading to lateral movement, data theft, or ransomware deployment.
Likely Case
Local privilege escalation or remote code execution when users open malicious TIFF files, potentially leading to malware installation or data exfiltration.
If Mitigated
Limited impact with proper application sandboxing, user privilege restrictions, and file validation controls in place.
🎯 Exploit Status
Exploitation requires user interaction to open malicious TIFF files; no authentication bypass is needed beyond file access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V13.2.0.5 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-595101.pdf
Restart Required: Yes
Instructions:
1. Download the latest version (V13.2.0.5 or newer) from Siemens support portal. 2. Install the update following Siemens installation procedures. 3. Restart affected systems to ensure the patch is fully applied.
🔧 Temporary Workarounds
Disable TIFF file association
windowsRemove TIFF file type associations with vulnerable software to prevent automatic execution
Use Windows File Explorer to change default program for .tiff/.tif files to a different application
Application control policies
windowsImplement application whitelisting to restrict execution of vulnerable software versions
Configure Windows AppLocker or similar solutions to block affected versions
🧯 If You Can't Patch
- Implement strict user privilege restrictions to limit impact of potential exploitation
- Deploy network segmentation to isolate systems running vulnerable software from critical assets
🔍 How to Verify
Check if Vulnerable:
Check software version in Help > About menu; versions below V13.2.0.5 are vulnerableCheck Version:
Not applicable - check via application GUI Help > AboutVerify Fix Applied:
Verify version is V13.2.0.5 or higher in Help > About menu📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing TIFF files
- Unusual process creation from JT2Go or Teamcenter Visualization processes
Network Indicators:
- Outbound connections from visualization software to unexpected destinations
- File downloads to systems running vulnerable software
SIEM Query:
Process creation where parent process contains 'jt2go' or 'teamcenter' AND child process is unusual for the environment