CVE-2021-44000
📋 TL;DR
This vulnerability allows remote code execution through an out-of-bounds write in Siemens JT2Go, Solid Edge, and Teamcenter Visualization software when parsing malicious PAR files. An attacker could execute arbitrary code with the privileges of the current user. Affected users include those running vulnerable versions of these Siemens CAD/PLM applications.
💻 Affected Systems
- JT2Go
- Solid Edge SE2021
- Solid Edge SE2022
- Teamcenter Visualization V13.1
- Teamcenter Visualization V13.2
- Teamcenter Visualization V13.3
📦 What is this software?
Jt2go by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
Solid Edge by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or application compromise when a user opens a malicious PAR file, potentially leading to data exfiltration or further attacks.
If Mitigated
Limited impact if proper application whitelisting and file validation are in place, though the vulnerability still presents a risk.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious PAR file. No public exploit code is available, but the vulnerability is well-documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: JT2Go V13.2.0.7, Solid Edge SE2021 MP9, Solid Edge SE2022 MP1, Teamcenter Visualization V13.1.0.9, V13.2.0.7, V13.3.0.1
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-301589.pdf
Restart Required: Yes
Instructions:
1. Download the latest version from Siemens support portal. 2. Backup current installation. 3. Run the installer with administrative privileges. 4. Restart the system after installation completes.
🔧 Temporary Workarounds
Block PAR file extensions
windowsPrevent execution of PAR files through application control or file blocking
Using Group Policy: Computer Configuration > Policies > Windows Settings > Security Settings > Software Restriction Policies > Additional Rules > New Path Rule: Path: *.par, Security Level: Disallowed
Disable plmxmlAdapterSE70.dll
windowsRemove or restrict access to the vulnerable DLL
takeown /f "C:\Program Files\Siemens\[application]\plmxmlAdapterSE70.dll"
icacls "C:\Program Files\Siemens\[application]\plmxmlAdapterSE70.dll" /deny Everyone:(F)
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized applications
- Educate users to never open PAR files from untrusted sources and implement email filtering for PAR attachments
🔍 How to Verify
Check if Vulnerable:
Check the installed version of affected Siemens applications against the vulnerable version rangesCheck Version:
For JT2Go: Check Help > About. For Solid Edge: Check Help > About Solid Edge. For Teamcenter Visualization: Check Help > AboutVerify Fix Applied:
Verify the application version matches or exceeds the patched versions listed in the fix section📡 Detection & Monitoring
Log Indicators:
- Application crashes in Siemens CAD applications
- Unexpected process creation from Siemens applications
- Access violations in application event logs
Network Indicators:
- Unusual outbound connections from engineering workstations
- PAR file downloads to engineering systems
SIEM Query:
EventID=1000 OR EventID=1001 AND SourceName="Application Error" AND ProcessName contains "jt2go" OR "solid edge" OR "teamcenter"