CVE-2024-11543
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious DXF files in IrfanView. Attackers can gain control of the affected system with the same privileges as the current user. All IrfanView users who process 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, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to malware installation, data exfiltration, or persistence mechanisms being established on the compromised system.
If Mitigated
Limited impact due to application sandboxing, limited user privileges, or network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) but the vulnerability itself is unauthenticated. Memory corruption vulnerabilities in popular software are frequently weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IrfanView 4.67 and later
Vendor Advisory: https://www.irfanview.com/
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 exploitation
Control Panel > Default Programs > Set Default Programs > Select IrfanView > Choose defaults for this program > Uncheck .dxf
Block DXF files at perimeter
allPrevent DXF files from entering the network via email or web downloads
🧯 If You Can't Patch
- Implement application whitelisting to prevent IrfanView execution
- Use endpoint protection with memory corruption detection capabilities
🔍 How to Verify
Check if Vulnerable:
Open IrfanView > Help > About > Check version number is below 4.67Check Version:
irfanview.exe /?Verify Fix Applied:
Open IrfanView > Help > About > Confirm version is 4.67 or higher📡 Detection & Monitoring
Log Indicators:
- IrfanView process crashes with DXF files
- Unusual child processes spawned from IrfanView
- Memory access violations in application logs
Network Indicators:
- Downloads of DXF files from untrusted sources
- Outbound connections from IrfanView process
SIEM Query:
process_name:"i_view64.exe" OR process_name:"i_view32.exe" AND (file_extension:".dxf" OR parent_process_crash:true)