CVE-2023-42046
📋 TL;DR
CVE-2023-42046 is an information disclosure vulnerability in PDF-XChange Editor's J2K file parser caused by uninitialized memory access. Attackers can exploit this by tricking users into opening malicious J2K files, potentially leaking sensitive process memory. Users of affected PDF-XChange Editor versions are vulnerable.
💻 Affected Systems
- PDF-XChange Editor
📦 What is this software?
Pdf Tools by Pdf Xchange
Pdf Xchange Editor by Pdf Xchange
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure combined with other vulnerabilities could lead to arbitrary code execution in the current process context.
Likely Case
Memory disclosure revealing sensitive information from the PDF-XChange Editor process, potentially including authentication tokens or system information.
If Mitigated
Limited information disclosure with no code execution due to proper memory protections and sandboxing.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and may require chaining with other vulnerabilities for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.1.381 and later
Vendor Advisory: https://www.tracker-software.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Download latest version from tracker-software.com 2. Run installer 3. Restart system 4. Verify version is 10.1.1.381 or higher
🔧 Temporary Workarounds
Disable J2K file association
windowsRemove J2K file type association with PDF-XChange Editor to prevent automatic opening
Control Panel > Default Programs > Associate a file type or protocol with a program > Remove .j2k association
Block J2K files at perimeter
allConfigure email/web gateways to block .j2k files
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of malicious files
- Use sandboxed environments for opening untrusted documents
🔍 How to Verify
Check if Vulnerable:
Check Help > About in PDF-XChange Editor for version numberCheck Version:
Not applicable - check via GUI Help > AboutVerify Fix Applied:
Verify version is 10.1.1.381 or higher in Help > About📡 Detection & Monitoring
Log Indicators:
- Process crashes when opening J2K files
- Unusual memory access patterns in process monitoring
Network Indicators:
- Downloads of .j2k files from untrusted sources
- Network traffic to known malicious domains after file opening
SIEM Query:
EventID=1000 OR EventID=1001 AND ProcessName="PDFXEdit.exe" AND ExceptionCode=0xC0000005