CVE-2020-7552
📋 TL;DR
This vulnerability allows remote code execution through an out-of-bounds write when a malicious configuration file is imported into IGSS Definition software. Attackers can exploit this by tricking users into importing specially crafted CGF files. Organizations using Schneider Electric's IGSS Definition version 14.0.0.20247 are affected.
💻 Affected Systems
- Schneider Electric IGSS Definition
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the IGSS Definition host, potentially leading to lateral movement within industrial control networks.
Likely Case
Local privilege escalation or remote code execution on systems where users import untrusted configuration files.
If Mitigated
Limited impact if proper file validation and user awareness prevent malicious file imports.
🎯 Exploit Status
Requires user interaction to import malicious CGF file. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 14.0.0.20248 or later
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2020-315-03/
Restart Required: Yes
Instructions:
1. Download the updated IGSS Definition version from Schneider Electric's website. 2. Install the update following vendor instructions. 3. Restart the system to ensure changes take effect.
🔧 Temporary Workarounds
Restrict CGF file imports
windowsImplement policies to prevent import of untrusted CGF files and only allow imports from trusted sources.
User awareness training
allTrain users to only import configuration files from trusted sources and verify file integrity.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized code
- Use network segmentation to isolate IGSS systems from general corporate networks
🔍 How to Verify
Check if Vulnerable:
Check IGSS Definition version by opening the application and viewing Help > About, or check the file properties of Def.exe.Check Version:
wmic datafile where name="C:\\Program Files\\IGSS\\Def.exe" get versionVerify Fix Applied:
Verify version is 14.0.0.20248 or later and test importing known-good CGF files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Failed CGF file imports
- Unexpected process creation from Def.exe
- Memory access violations in application logs
Network Indicators:
- Unusual outbound connections from IGSS systems
- File transfers to IGSS systems containing CGF files
SIEM Query:
Process Creation where Image contains "Def.exe" and CommandLine contains ".cgf"