CVE-2024-7723
📋 TL;DR
This is a use-after-free vulnerability in Foxit PDF Reader's AcroForm handling that allows remote code execution when users open malicious PDF files. Attackers can exploit this to run arbitrary code with the same privileges as the current user. All users running vulnerable versions of Foxit PDF Reader are affected.
💻 Affected Systems
- Foxit PDF Reader
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Malware installation, credential theft, or lateral movement within the network after user opens a malicious PDF.
If Mitigated
Limited impact with proper application sandboxing, least privilege, and network segmentation preventing lateral movement.
🎯 Exploit Status
Requires user interaction (opening malicious file). ZDI-CAN-23736 suggests active research interest.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Foxit security bulletins for latest patched version
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Visit Foxit security bulletins page
2. Download latest version
3. Install update
4. Restart system
🔧 Temporary Workarounds
Disable JavaScript in Foxit
allPrevents JavaScript-based exploitation vectors
Open Foxit Reader > Edit > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use Protected View
windowsOpens PDFs in sandboxed environment
Open Foxit Reader > File > Preferences > Trust Manager > Check 'Enable Safe Reading Mode'
🧯 If You Can't Patch
- Restrict PDF opening to trusted sources only
- Use alternative PDF reader software temporarily
🔍 How to Verify
Check if Vulnerable:
Check Foxit Reader version against affected versions in security bulletinCheck Version:
Open Foxit Reader > Help > About Foxit ReaderVerify Fix Applied:
Verify installed version matches or exceeds patched version from Foxit advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected Foxit Reader crashes
- Suspicious child processes spawned from Foxit
Network Indicators:
- Outbound connections from Foxit to unknown IPs
- DNS requests for suspicious domains
SIEM Query:
process_name:"FoxitReader.exe" AND (event_id:1 OR parent_process_name:"FoxitReader.exe")