CVE-2023-42049
📋 TL;DR
PDF-XChange Editor contains an out-of-bounds read vulnerability when parsing EMF files, allowing attackers to disclose sensitive information from memory. Users who open malicious PDF files or visit malicious web pages are affected. This vulnerability can be combined with other exploits to potentially execute arbitrary code.
💻 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 from memory, potentially exposing sensitive data or system information.
If Mitigated
Limited information disclosure with no code execution if proper memory protections are in place.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). The vulnerability alone provides information disclosure; code execution requires chaining with other vulnerabilities.
🛠️ 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 EMF file processing
windowsConfigure PDF-XChange Editor to not process EMF files
Registry modification required - consult vendor documentation
Use application control
windowsBlock execution of vulnerable PDF-XChange Editor versions
Configure AppLocker or Windows Defender Application Control policies
🧯 If You Can't Patch
- Restrict user permissions to limit impact of information disclosure
- Implement network segmentation to contain potential lateral movement
🔍 How to Verify
Check if Vulnerable:
Check Help > About in PDF-XChange Editor for version numberCheck Version:
Not applicable - check via GUI in Help > About menuVerify Fix Applied:
Verify version is 10.1.1.380 or higher in Help > About📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing EMF files
- Unusual memory access patterns
Network Indicators:
- Downloads of EMF files from untrusted sources
- Network traffic to known malicious domains after file opening
SIEM Query:
EventID=1000 OR EventID=1001 with PDF-XChange Editor in process name