CVE-2023-42036
📋 TL;DR
This vulnerability in Kofax Power PDF allows remote attackers to execute arbitrary code by tricking users into opening malicious PDF files. The flaw exists in PDF parsing where improper data validation leads to memory corruption. All users running vulnerable versions of Kofax Power PDF are affected.
💻 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, data theft, ransomware deployment, and lateral movement within the network.
Likely Case
Malicious code execution with user privileges, potentially leading to data exfiltration, credential theft, and installation of persistent malware.
If Mitigated
Limited impact with proper controls - potentially application crash or denial of service if exploit fails, but no code execution.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious PDF). The vulnerability is memory corruption leading to RCE, making it attractive for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kofax security advisory for specific patched version
Vendor Advisory: https://docshield.kofax.com/PowerPDF/en_US/5.0.0-5.0.0.10/wwhelp/wwhimpl/js/html/wwhelp.htm#href=Security.07.3.html
Restart Required: Yes
Instructions:
1. Check current Power PDF version
2. Visit Kofax support portal
3. Download latest security update
4. Install update
5. Restart system
🔧 Temporary Workarounds
Disable PDF file opening
windowsPrevent Power PDF from being default handler for PDF files
Control Panel > Default Programs > Set Default Programs > Choose another program for .pdf
Application control restriction
windowsBlock Power PDF execution via application control policies
🧯 If You Can't Patch
- Implement application whitelisting to block Power PDF execution
- Use network segmentation to isolate systems with vulnerable software
- Deploy email/web filtering to block malicious PDF attachments
- Educate users about PDF security risks and safe handling procedures
🔍 How to Verify
Check if Vulnerable:
Check Power PDF version against Kofax security advisory. Versions before the patched release are vulnerable.Check Version:
In Power PDF: Help > About Power PDFVerify Fix Applied:
Verify Power PDF version matches or exceeds patched version specified in Kofax advisory.📡 Detection & Monitoring
Log Indicators:
- Power PDF crash logs
- Unexpected process creation from Power PDF
- Memory access violations in application logs
Network Indicators:
- Outbound connections from Power PDF process to suspicious IPs
- DNS queries for known malicious domains from PDF-related processes
SIEM Query:
Process Creation where (Image contains 'PowerPDF' OR ParentImage contains 'PowerPDF') AND CommandLine contains '.pdf'