CVE-2020-27288
📋 TL;DR
CVE-2020-27288 is an untrusted pointer dereference vulnerability in TPEditor versions 1.98 and earlier that allows arbitrary code execution when processing malicious project files. Attackers can craft special project files to exploit this vulnerability. This affects all users of vulnerable TPEditor versions.
💻 Affected Systems
- TPEditor
📦 What is this software?
Tpeditor by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the affected system, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or remote code execution when users open malicious project files, potentially leading to malware installation or data exfiltration.
If Mitigated
Limited impact if proper application whitelisting and file validation are implemented, though the vulnerability still exists in the software.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious project file. No public exploit code has been identified, but the vulnerability is well-documented in ICS advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.99 or later
Vendor Advisory: https://us-cert.cisa.gov/ics/advisories/icsa-21-021-02
Restart Required: Yes
Instructions:
1. Download TPEditor version 1.99 or later from the official vendor website. 2. Uninstall the vulnerable version. 3. Install the updated version. 4. Restart the system to ensure all components are properly loaded.
🔧 Temporary Workarounds
Restrict project file execution
windowsConfigure Windows to prevent execution of .tpe project files or restrict TPEditor from opening untrusted files
Use Windows Group Policy to restrict file associations for .tpe files
Configure application control policies to limit TPEditor execution
User awareness training
allTrain users to only open project files from trusted sources and verify file integrity
🧯 If You Can't Patch
- Implement application whitelisting to restrict TPEditor execution to specific directories and users
- Use network segmentation to isolate systems running TPEditor from critical network segments
🔍 How to Verify
Check if Vulnerable:
Check TPEditor version by opening the application and navigating to Help > About. If version is 1.98 or earlier, the system is vulnerable.Check Version:
Check TPEditor.exe properties or use 'wmic product where name="TPEditor" get version' in command promptVerify Fix Applied:
After updating, verify the version shows 1.99 or later in Help > About menu. Test opening known-good project files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from TPEditor.exe
- Multiple failed attempts to open project files
- Unexpected network connections from TPEditor process
Network Indicators:
- Outbound connections from TPEditor to unexpected destinations
- File downloads to systems running TPEditor
SIEM Query:
Process Creation where Image contains "TPEditor.exe" AND CommandLine contains ".tpe" AND ParentImage not in ("explorer.exe", "cmd.exe")