CVE-2023-51608
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious J2K files in Kofax Power PDF. Attackers can exploit memory corruption during J2K file parsing to gain control of the affected system. Users of vulnerable Kofax Power PDF installations 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 victim's machine, enabling data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious code execution in the context of the current user, potentially leading to credential theft, data exfiltration, or installation of persistent malware.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the PDF application context.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) but uses common memory corruption techniques; ZDI advisory suggests weaponization is probable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references; check Kofax security advisory
Vendor Advisory: https://www.kofax.com/security/advisories (check for specific advisory)
Restart Required: Yes
Instructions:
1. Check Kofax security advisory for specific patched version
2. Download latest Power PDF update from official Kofax website
3. Install update following vendor instructions
4. Restart system if required
🔧 Temporary Workarounds
Disable J2K file association
windowsRemove J2K file type association with Kofax Power PDF to prevent automatic opening
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program > Remove .j2k association with Power PDF
Application sandboxing
windowsRun Power PDF in restricted environment using application control or sandboxing tools
🧯 If You Can't Patch
- Implement strict email/web filtering to block J2K files
- Educate users to never open J2K files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Power PDF version against Kofax security advisory; if using unpatched version, assume vulnerableCheck Version:
Power PDF: Help > About (version displayed in dialog)Verify Fix Applied:
Verify Power PDF version matches or exceeds patched version specified in Kofax advisory📡 Detection & Monitoring
Log Indicators:
- Power PDF crash logs with memory access violations
- Unexpected process creation from Power PDF executable
Network Indicators:
- Outbound connections from Power PDF to suspicious IPs post-J2K file opening
SIEM Query:
Process creation where parent_process contains 'PowerPDF' AND (process_name contains 'cmd.exe' OR process_name contains 'powershell.exe')