CVE-2023-38081
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious JP2 files in Kofax Power PDF. The flaw exists in JP2 file parsing where improper data validation enables out-of-bounds writes. All users of affected Kofax Power PDF versions are vulnerable.
💻 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 victim's machine in the context of the current user.
Likely Case
Remote code execution leading to data theft, ransomware deployment, or lateral movement within the network.
If Mitigated
Limited impact if proper security controls prevent malicious file execution or contain the process.
🎯 Exploit Status
Exploitation requires user to open malicious JP2 file. No authentication needed for the exploit itself.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-23-959/
Restart Required: Yes
Instructions:
1. Check Kofax Power PDF version
2. Update to latest version from official Kofax website
3. Restart system after installation
🔧 Temporary Workarounds
Disable JP2 file association
windowsPrevent Power PDF from automatically opening JP2 files
Control Panel > Default Programs > Associate a file type or protocol with a program > Change .jp2 association to another application
Block JP2 files at perimeter
allPrevent JP2 files from entering the network
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized executables
- Use sandboxing or virtualization for PDF processing
🔍 How to Verify
Check if Vulnerable:
Check Power PDF version against latest patched version from KofaxCheck Version:
Open Power PDF > Help > AboutVerify Fix Applied:
Verify Power PDF version is updated to latest release📡 Detection & Monitoring
Log Indicators:
- Power PDF crash logs with memory access violations
- Unexpected child processes spawned from Power PDF
Network Indicators:
- Unusual outbound connections from Power PDF process
SIEM Query:
Process creation where parent process contains 'PowerPDF' AND (command line contains '.jp2' OR file extension is '.jp2')