CVE-2024-11533
📋 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 data validation leads to buffer overflow. 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 IrfanView user, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to user account compromise, data exfiltration, or malware installation on the affected system.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially only application crash or denial of service.
🎯 Exploit Status
Exploitation requires user to open malicious DXF file. No authentication needed beyond file access. Weaponization likely due to RCE nature and user interaction requirement.
🛠️ 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 exploitation
Control Panel > Default Programs > Set Associations > Find .DXF > Change program to Notepad or other safe viewer
Application sandboxing
windowsRun IrfanView with reduced privileges using sandboxing tools
RunAs /trustlevel:0x20000 "C:\Program Files\IrfanView\i_view64.exe"
🧯 If You Can't Patch
- Implement application whitelisting to block IrfanView execution
- Use network segmentation to isolate systems running vulnerable IrfanView versions
🔍 How to Verify
Check if Vulnerable:
Open IrfanView > Help > About IrfanView, check if version is below 4.67Check Version:
"C:\Program Files\IrfanView\i_view64.exe" /?Verify Fix Applied:
Confirm IrfanView version is 4.67 or higher in About dialog📡 Detection & Monitoring
Log Indicators:
- IrfanView crash logs with DXF file references
- Windows Application Error events with IrfanView process
Network Indicators:
- Unusual outbound connections from IrfanView process
- DXF file downloads from untrusted sources
SIEM Query:
process_name:"i_view*.exe" AND (file_name:"*.dxf" OR file_extension:"dxf")