CVE-2020-26980
📋 TL;DR
This vulnerability allows remote code execution through malicious JT files in Siemens JT2Go and Teamcenter Visualization software. Attackers can exploit a type confusion flaw when parsing JT files to execute arbitrary code with the privileges of the current user. 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
Full system compromise with attacker gaining the same privileges as the user running the vulnerable application, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Malicious JT files delivered via phishing or compromised websites lead to code execution on user workstations, enabling credential theft, data exfiltration, or malware installation.
If Mitigated
With proper network segmentation and application sandboxing, impact is limited to the isolated application environment without system-wide compromise.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious JT file. No authentication is required for the file parsing operation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V13.1.0 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-622830.pdf
Restart Required: Yes
Instructions:
1. Download and install JT2Go V13.1.0 or later from Siemens support portal
2. Download and install Teamcenter Visualization V13.1.0 or later from Siemens support portal
3. Restart affected systems after installation
🔧 Temporary Workarounds
Disable JT file association
windowsPrevent JT files from automatically opening with vulnerable software
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program > Change .jt association to a different application
Application sandboxing
allRun vulnerable applications in restricted environments
🧯 If You Can't Patch
- Implement strict email filtering to block JT file attachments
- Use application whitelisting to prevent execution of unauthorized code
🔍 How to Verify
Check if Vulnerable:
Check software version in Help > About in JT2Go or Teamcenter Visualization interfaceCheck Version:
Not applicable - check via GUI onlyVerify Fix Applied:
Confirm version is V13.1.0 or higher in Help > About📡 Detection & Monitoring
Log Indicators:
- Application crashes when parsing JT files
- Unusual process creation from JT2Go or Teamcenter Visualization processes
Network Indicators:
- Downloads of JT files from untrusted sources
- Outbound connections from visualization software to suspicious IPs
SIEM Query:
Process Creation where ParentImage contains 'jt2go.exe' OR ParentImage contains 'visview.exe' AND CommandLine contains unusual parameters