CVE-2024-11551
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious DXF files in IrfanView. The memory corruption flaw in DXF file parsing can lead to complete system compromise. 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 victim's machine, data theft, ransomware deployment, and lateral movement within the network.
Likely Case
Malware installation leading to data exfiltration, credential theft, and persistence mechanisms being established on the compromised system.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially resulting in application crash but no code execution.
🎯 Exploit Status
Exploitation requires user interaction but the vulnerability is straightforward to weaponize once technical details are understood. ZDI has confirmed the vulnerability.
🛠️ 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 Associations > Find .DXF > Change to another program
Application sandboxing
windowsRun IrfanView in restricted environment to limit potential damage
🧯 If You Can't Patch
- Block DXF files at network perimeter and email gateways
- Implement application whitelisting to prevent IrfanView execution
🔍 How to Verify
Check if Vulnerable:
Open IrfanView, go to Help > About, check if version is below 4.67Check Version:
irfanview.exe /?Verify Fix Applied:
Confirm IrfanView version is 4.67 or higher in Help > About dialog📡 Detection & Monitoring
Log Indicators:
- IrfanView crash logs with memory access violations
- Unexpected IrfanView process spawning child processes
Network Indicators:
- Downloads of DXF files from untrusted sources
- Outbound connections from IrfanView process
SIEM Query:
Process Creation where Image ends with 'i_view64.exe' or 'i_view32.exe' and CommandLine contains '.dxf'