CVE-2024-11511
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening a malicious XCF file in IrfanView. Attackers can exploit a heap-based buffer overflow in the XCF plugin to gain code execution in the context of the current process. All users of affected IrfanView versions are at risk.
💻 Affected Systems
- IrfanView
📦 What is this software?
Irfanview by Irfanview
⚠️ Risk & Real-World Impact
Worst Case
Full 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 data exfiltration through crafted XCF files delivered via email, downloads, or malicious websites.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the IrfanView process.
🎯 Exploit Status
Requires user interaction (opening malicious file). ZDI advisory suggests exploit development is feasible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IrfanView 4.67
Vendor Advisory: https://www.irfanview.com/main_history.htm
Restart Required: No
Instructions:
1. Download IrfanView 4.67 or later from official website
2. Run installer and follow prompts
3. Verify version in Help > About
🔧 Temporary Workarounds
Disable XCF plugin
windowsRemove or disable the XCF plugin to prevent parsing of XCF files
Navigate to IrfanView plugins folder (typically C:\Program Files\IrfanView\Plugins)
Rename or delete XCF.DLL
Block XCF file associations
windowsPrevent IrfanView from opening XCF files by default
Control Panel > Default Programs > Set Associations
Find .xcf extension and change to different program or no program
🧯 If You Can't Patch
- Implement application allowlisting to restrict IrfanView execution
- Use sandboxing solutions to isolate IrfanView from critical systems
🔍 How to Verify
Check if Vulnerable:
Check IrfanView version in Help > About. If version is below 4.67, system is vulnerable.Check Version:
irfanview.exe /?Verify Fix Applied:
Verify version is 4.67 or higher in Help > About. Test opening legitimate XCF files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- IrfanView crash logs with XCF-related errors
- Windows Application Event Logs showing IrfanView crashes
Network Indicators:
- Downloads of XCF files from suspicious sources
- Email attachments with XCF files
SIEM Query:
source="*irfanview*" AND (event_id=1000 OR event_id=1001) AND message="*xcf*"