CVE-2024-7725
📋 TL;DR
This is a use-after-free vulnerability in Foxit PDF Reader's AcroForm handling that allows remote attackers to execute arbitrary code when a user opens a malicious PDF file. It affects users of vulnerable Foxit PDF Reader versions who open untrusted PDF documents. The vulnerability has a high CVSS score of 8.8 due to its remote code execution impact.
💻 Affected Systems
- Foxit PDF Reader
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's machine, data theft, ransomware deployment, and lateral movement within the network.
Likely Case
Malicious code execution in the context of the current user, potentially leading to credential theft, data exfiltration, or installation of persistent malware.
If Mitigated
Limited impact with proper application sandboxing, minimal user privileges, and network segmentation preventing lateral movement.
🎯 Exploit Status
User interaction required (opening malicious PDF). ZDI has published advisory ZDI-24-1127 indicating active research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Foxit's security bulletin for specific patched versions
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Visit Foxit's security bulletins page
2. Download and install the latest version of Foxit PDF Reader
3. Restart the application and system if prompted
🔧 Temporary Workarounds
Disable JavaScript in Foxit Reader
windowsPrevents JavaScript execution which may be used in exploitation chains
Open Foxit Reader > File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use Protected View
windowsOpen PDFs in protected mode to limit potential damage
Open Foxit Reader > File > Preferences > Trust Manager > Check 'Enable Safe Reading Mode'
🧯 If You Can't Patch
- Restrict PDF file opening to trusted sources only
- Use alternative PDF readers that are not vulnerable
🔍 How to Verify
Check if Vulnerable:
Check Foxit Reader version against vulnerable versions listed in Foxit's security bulletinCheck Version:
Open Foxit Reader > Help > About Foxit ReaderVerify Fix Applied:
Verify installed version matches or exceeds patched version from Foxit's advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected Foxit Reader crashes
- Suspicious child processes spawned from Foxit Reader
- Unusual network connections from Foxit Reader process
Network Indicators:
- Outbound connections from Foxit Reader to unknown IPs
- DNS requests for suspicious domains from PDF reader process
SIEM Query:
process_name:"FoxitReader.exe" AND (event_type:crash OR child_process_spawn:true)