CVE-2020-13572
📋 TL;DR
A heap overflow vulnerability in Accusoft ImageGear's GIF parser allows arbitrary code execution when processing specially crafted GIF files. This affects systems using ImageGear 19.8 for image processing. Attackers can exploit this by tricking users or automated systems into opening malicious GIF files.
💻 Affected Systems
- Accusoft ImageGear
📦 What is this software?
Imagegear by Accusoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Application crash leading to denial of service, or limited code execution within the application context.
If Mitigated
Application crash with no code execution if memory protections like ASLR/DEP are properly implemented.
🎯 Exploit Status
Exploitation requires user interaction to open malicious file or automated processing of uploaded files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 19.9 or later
Vendor Advisory: https://www.accusoft.com/products/imagegear/
Restart Required: Yes
Instructions:
1. Download ImageGear 19.9 or later from Accusoft. 2. Uninstall vulnerable version. 3. Install updated version. 4. Restart affected systems.
🔧 Temporary Workarounds
Disable GIF processing
allConfigure applications to reject or not process GIF files using ImageGear.
File type filtering
allImplement strict file type validation to block GIF uploads/processing.
🧯 If You Can't Patch
- Isolate systems using ImageGear from internet access
- Implement application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check ImageGear version in installed programs or application dependencies.Check Version:
On Windows: Check Programs and Features. On Linux: Check package manager or library version.Verify Fix Applied:
Verify ImageGear version is 19.9 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing GIF files
- Memory access violation errors in application logs
Network Indicators:
- Unusual outbound connections after GIF file processing
- File uploads containing malformed GIF headers
SIEM Query:
ImageGear AND (crash OR memory OR overflow) OR filetype:gif AND suspicious_activity