CVE-2024-11509
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on systems running vulnerable versions of IrfanView by tricking users into opening malicious SVG files. The heap-based buffer overflow occurs during SVG parsing due to insufficient length validation. All IrfanView users who open untrusted SVG files are affected.
💻 Affected Systems
- IrfanView
📦 What is this software?
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 lateral movement.
Likely Case
Local privilege escalation or malware installation on the affected system, particularly if IrfanView runs with standard user privileges.
If Mitigated
Limited impact with application crash or denial of service if exploit fails or security controls block execution.
🎯 Exploit Status
Exploitation requires user interaction but is technically straightforward once a malicious SVG is crafted. The ZDI advisory suggests active exploitation is probable.
🛠️ 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 the official website. 2. Run the installer. 3. Follow installation prompts to update. 4. Verify version in Help > About.
🔧 Temporary Workarounds
Disable SVG plugin
windowsRemove or disable the SVG plugin to prevent parsing of SVG files
Navigate to IrfanView plugins folder and rename or delete SVG.DLL
File association removal
windowsRemove IrfanView as default handler for SVG files
Control Panel > Default Programs > Set Default Programs > Choose IrfanView > Choose defaults for this program > Uncheck SVG
🧯 If You Can't Patch
- Implement application whitelisting to block IrfanView execution
- Use endpoint protection with exploit prevention capabilities
🔍 How to Verify
Check if Vulnerable:
Open IrfanView, go to Help > About. If version is below 4.67, the system is vulnerable.Check 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
- Windows Application Event Logs with Faulting Module: SVG.DLL
Network Indicators:
- Downloads of SVG files from untrusted sources
- Unusual outbound connections after SVG file opening
SIEM Query:
source="windows" AND (event_id=1000 OR event_id=1001) AND process_name="i_view32.exe" AND faulting_module="SVG.DLL"