CVE-2024-11567
📋 TL;DR
This vulnerability in IrfanView allows remote attackers to execute arbitrary code by tricking users into opening malicious DXF files. The flaw exists in DXF file parsing where improper input validation 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 the same privileges as the user running IrfanView, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Malware installation or system compromise when users open malicious DXF files from untrusted sources like email attachments or downloads.
If Mitigated
No impact if users only open trusted DXF files or if the application is patched.
🎯 Exploit Status
Exploitation requires user interaction to open malicious file. ZDI-CAN-24871 indicates professional vulnerability research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check IrfanView website for latest version
Vendor Advisory: https://www.irfanview.com/
Restart Required: No
Instructions:
1. Visit https://www.irfanview.com/ 2. Download latest version 3. Install over existing installation 4. Verify version is updated
🔧 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 .dxf files at email gateways and web proxies
🧯 If You Can't Patch
- Implement application whitelisting to block IrfanView execution
- Educate users to never open DXF files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check IrfanView version via Help > About. If version is older than patched release, system is vulnerable.Check Version:
irfanview.exe /?Verify Fix Applied:
Verify IrfanView version matches latest release from official website.📡 Detection & Monitoring
Log Indicators:
- IrfanView process crashes when opening DXF files
- Unusual child processes spawned from IrfanView
Network Indicators:
- Downloads of DXF files from untrusted sources
- Outbound connections from IrfanView process
SIEM Query:
Process Creation where Image contains 'i_view' and CommandLine contains '.dxf'