CVE-2023-42073
📋 TL;DR
This vulnerability in PDF-XChange Editor allows attackers to read memory beyond allocated boundaries when processing malicious PDF files with embedded JavaScript. It affects users who open untrusted PDF documents, potentially leading to information disclosure that could be combined with other exploits for code execution.
💻 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 context of the current user, potentially resulting in full system compromise.
Likely Case
Sensitive memory contents disclosure including potentially authentication tokens, passwords, or other application data that could facilitate further attacks.
If Mitigated
Limited information disclosure with no code execution due to proper sandboxing and security controls.
🎯 Exploit Status
Requires user interaction to open malicious PDF. Exploit requires JavaScript execution within PDF context.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.1.380 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 10.1.1.380 or higher
🔧 Temporary Workarounds
Disable JavaScript in PDF-XChange Editor
windowsPrevents JavaScript execution in PDF files, blocking the exploitation vector
Settings > Preferences > JavaScript > Uncheck 'Enable JavaScript Actions'
Use alternative PDF viewer
windowsTemporarily use different PDF software until patched
🧯 If You Can't Patch
- Implement application whitelisting to block PDF-XChange Editor execution
- Deploy email/web filtering to block PDF attachments from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Open PDF-XChange Editor > Help > About. Check if version is below 10.1.1.380Check Version:
Get-ItemProperty 'HKLM:\SOFTWARE\Tracker Software\PDFXEditor3' | Select-Object -ExpandProperty VersionVerify Fix Applied:
Confirm version is 10.1.1.380 or higher in Help > About dialog📡 Detection & Monitoring
Log Indicators:
- Application crashes of PDF-XChange Editor
- Unusual memory access patterns in application logs
Network Indicators:
- Downloads of PDF files from suspicious sources
- PDF files with embedded JavaScript
SIEM Query:
source="PDF-XChange Editor" AND (event="crash" OR event="exception")