CVE-2024-9767
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious SID files in IrfanView. The flaw exists in SID file parsing where improper input validation leads to out-of-bounds reads that can be leveraged for code execution. All IrfanView users who open untrusted SID 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 process, potentially leading to malware installation, data theft, or lateral movement.
Likely Case
Local privilege escalation or arbitrary code execution within the user's context, allowing file system access, credential theft, or persistence mechanisms.
If Mitigated
Application crash or denial of service if exploit attempts fail or are blocked by security controls.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). The vulnerability is memory corruption-based requiring specific exploit development.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version - check IrfanView website for latest release
Vendor Advisory: https://www.irfanview.com/
Restart Required: No
Instructions:
1. Visit https://www.irfanview.com/
2. Download and install the latest version of IrfanView
3. Replace any existing vulnerable installations
🔧 Temporary Workarounds
Disable SID file association
windowsRemove IrfanView as the default handler for SID files to prevent automatic opening
Control Panel > Default Programs > Set Default Programs > Select IrfanView > Choose defaults for this program > Uncheck .SID
Block SID files at perimeter
allConfigure email/web gateways to block .SID file attachments
🧯 If You Can't Patch
- Implement application whitelisting to prevent IrfanView execution
- Use endpoint protection with exploit prevention capabilities
🔍 How to Verify
Check if Vulnerable:
Check IrfanView version in Help > About. If not the latest version, assume vulnerable.Check Version:
irfanview.exe /?Verify Fix Applied:
Verify IrfanView version matches latest release from official website.📡 Detection & Monitoring
Log Indicators:
- IrfanView crash logs
- Windows Application Error events with IrfanView process
Network Indicators:
- Downloads of .SID files from untrusted sources
- Unusual outbound connections after IrfanView execution
SIEM Query:
process_name:"i_view32.exe" OR process_name:"i_view64.exe" AND (file_extension:".sid" OR event_id:1000)