CVE-2024-11563
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious DXF files in IrfanView. The flaw exists in DXF file parsing where improper bounds checking enables out-of-bounds reads that can lead to remote code execution. All IrfanView users who open untrusted DXF files are affected.
💻 Affected Systems
- IrfanView
📦 What is this software?
Irfanview by Irfanview
Irfanview by Irfanview
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the affected system in the context of the current user.
Likely Case
Malicious code execution leading to data theft, ransomware deployment, or system compromise when users open crafted DXF files.
If Mitigated
Limited impact if users only open trusted files and have proper endpoint protection.
🎯 Exploit Status
Exploitation requires user interaction to open malicious file. ZDI-CAN-24860 indicates professional vulnerability research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IrfanView 4.67 and later
Vendor Advisory: https://www.irfanview.com/main_history.htm
Restart Required: No
Instructions:
1. Download latest IrfanView from official website
2. Run installer
3. Follow installation prompts
4. Verify version is 4.67 or higher
🔧 Temporary Workarounds
Disable DXF file association
windowsRemove IrfanView as default handler for DXF files to prevent automatic opening
Control Panel > Default Programs > Set Default Programs > Select IrfanView > Choose defaults for this program > Uncheck .dxf
Block DXF files at perimeter
allFilter or block DXF files at email gateways and web proxies
🧯 If You Can't Patch
- Implement application whitelisting to block IrfanView execution
- Use endpoint protection with memory protection and exploit mitigation
🔍 How to Verify
Check if Vulnerable:
Check IrfanView version via Help > About. Versions below 4.67 are vulnerable.Check Version:
irfanview.exe /?Verify Fix Applied:
Confirm version is 4.67 or higher in Help > About dialog.📡 Detection & Monitoring
Log Indicators:
- IrfanView crash logs with memory access violations
- Windows Application logs showing IrfanView failures
Network Indicators:
- DXF file downloads from untrusted sources
- Email attachments with DXF files
SIEM Query:
source="windows" AND (process="irfanview.exe" AND (event_id=1000 OR event_id=1001))