CVE-2023-51569
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious BMP files in Kofax Power PDF. The flaw exists in BMP file parsing where improper data validation enables out-of-bounds writes. All users of affected Kofax Power PDF versions are at risk.
💻 Affected Systems
- Kofax Power PDF
📦 What is this software?
Power Pdf by Tungstenautomation
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the affected system in the context of the current user.
Likely Case
Remote code execution leading to malware installation, data theft, or ransomware deployment.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions.
🎯 Exploit Status
Exploitation requires user to open malicious file but no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kofax security advisory for specific version
Vendor Advisory: https://docshield.kofax.com/PowerPDF/en_US/5.5.0-d3ps5gqk5d/print/ReadMe.htm
Restart Required: Yes
Instructions:
1. Check current Power PDF version
2. Download latest version from Kofax website
3. Install update
4. Restart system
🔧 Temporary Workarounds
Block BMP file extensions
windowsPrevent Power PDF from opening BMP files via group policy or application settings
Disable BMP file association
windowsRemove BMP file association with Power PDF in Windows
assoc .bmp=
ftype BMPFile=
🧯 If You Can't Patch
- Restrict user privileges to prevent system-wide compromise
- Implement application sandboxing or virtualization
🔍 How to Verify
Check if Vulnerable:
Check Power PDF version against patched version in Kofax advisoryCheck Version:
Open Power PDF → Help → AboutVerify Fix Applied:
Verify Power PDF version matches or exceeds patched version📡 Detection & Monitoring
Log Indicators:
- Power PDF crash logs with BMP file access
- Unexpected process execution from Power PDF
Network Indicators:
- Downloads of BMP files followed by Power PDF execution
SIEM Query:
Process:PowerPDF.exe AND FileExtension:.bmp