CVE-2021-44001
📋 TL;DR
This vulnerability allows remote code execution through specially crafted PDF files in Siemens JT2Go and Teamcenter Visualization software. Attackers can exploit an out-of-bounds write in DL180pdfl.dll to execute arbitrary code with the privileges of the current process. All users of affected versions are at risk.
💻 Affected Systems
- Siemens JT2Go
- Siemens Teamcenter Visualization
📦 What is this software?
Jt2go by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install malware, steal data, or pivot to other systems.
Likely Case
Malicious PDF files delivered via email or web downloads lead to remote code execution on vulnerable systems.
If Mitigated
Limited impact with proper application whitelisting, network segmentation, and user awareness training.
🎯 Exploit Status
Exploitation requires user to open malicious PDF file. No authentication needed for the file parsing vulnerability.
🛠️ 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 V13.2.0.5 or later from Siemens support portal. 2. Install update following vendor instructions. 3. Restart affected systems.
🔧 Temporary Workarounds
Disable PDF parsing
windowsConfigure software to not use DL180pdfl.dll for PDF processing
Consult Siemens documentation for DLL disabling procedures
Application control
windowsUse Windows AppLocker or similar to restrict PDF file execution
New-AppLockerPolicy -RuleType Path -Action Deny -Path "*.pdf" -User Everyone
🧯 If You Can't Patch
- Implement strict email filtering for PDF attachments
- Use network segmentation to isolate vulnerable systems from critical assets
🔍 How to Verify
Check if Vulnerable:
Check software version in Help > About. If version is below V13.2.0.5, system is vulnerable.Check Version:
Check application version via Help > About menu in the software interfaceVerify Fix Applied:
Verify version is V13.2.0.5 or higher in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Application crashes from JT2Go or Teamcenter Visualization
- Unexpected process creation from PDF viewer
Network Indicators:
- Unusual outbound connections from affected software
- PDF file downloads followed by suspicious activity
SIEM Query:
source="windows" AND (process_name="jt2go.exe" OR process_name="visview.exe") AND event_id=1000