CVE-2023-42087
📋 TL;DR
This vulnerability in PDF-XChange Editor allows attackers to read memory beyond allocated bounds when processing malicious EMF files, potentially disclosing sensitive information. Users who open malicious PDF files or visit compromised websites are affected. The vulnerability requires user interaction but 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 process.
Likely Case
Information disclosure through out-of-bounds memory reads, potentially exposing sensitive data from the application's memory space.
If Mitigated
Limited information disclosure with proper sandboxing and memory protection controls in place.
🎯 Exploit Status
Requires user interaction to open malicious file. Exploit would need to bypass ASLR/DEP for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.2.382 and later
Vendor Advisory: https://www.tracker-software.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Open PDF-XChange Editor
2. Go to Help > Check for Updates
3. Follow prompts to update to version 10.1.2.382 or later
4. Restart the application
🔧 Temporary Workarounds
Disable EMF file processing
windowsConfigure PDF-XChange Editor to not process EMF files or disable related features
Application sandboxing
windowsRun PDF-XChange Editor in restricted/sandboxed environment
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of untrusted PDF files
- Use email/web filtering to block EMF files and suspicious PDF attachments
🔍 How to Verify
Check if Vulnerable:
Check PDF-XChange Editor version in Help > About. If version is below 10.1.2.382, system is vulnerable.Check Version:
Not applicable - check via GUI in Help > AboutVerify Fix Applied:
Verify version is 10.1.2.382 or higher in Help > About dialog.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing EMF files
- Unusual memory access patterns in application logs
Network Indicators:
- Downloads of EMF files or suspicious PDFs containing EMF content
SIEM Query:
EventID=1000 OR EventID=1001 AND Source="PDF-XChange Editor" AND Keywords="Crash"