CVE-2024-30365
📋 TL;DR
This CVE describes a use-after-free vulnerability in Foxit PDF Reader's AcroForm handling, allowing remote attackers to execute arbitrary code when a user opens a malicious PDF file. It affects users of Foxit PDF Reader who interact with untrusted documents, potentially leading to full system compromise.
💻 Affected Systems
- Foxit PDF Reader
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining control of the user's system, data theft, and lateral movement within the network.
Likely Case
Remote code execution in the context of the current user, leading to malware installation, data exfiltration, or ransomware deployment.
If Mitigated
Limited impact if systems are patched, use application sandboxing, or restrict PDF handling to trusted sources, preventing exploitation.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file), but use-after-free flaws are often weaponized in targeted attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Foxit security bulletins for specific version; typically latest stable release.
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 or system as prompted.
🔧 Temporary Workarounds
Disable AcroForm Handling
windowsConfigure Foxit PDF Reader to disable or restrict AcroForm functionality to reduce attack surface.
Navigate to Edit > Preferences > Security (Enhanced) and disable JavaScript or AcroForm features if available.
Use Alternative PDF Viewer
allTemporarily switch to a different PDF reader that is not affected by this vulnerability.
🧯 If You Can't Patch
- Restrict PDF file handling to trusted sources only and block downloads from unknown websites.
- Implement application whitelisting to prevent execution of unauthorized code and use endpoint detection and response (EDR) tools.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of Foxit PDF Reader against the patched version listed in Foxit's security advisory.Check Version:
In Foxit PDF Reader, go to Help > About Foxit Reader to view the version number.Verify Fix Applied:
Confirm the version is updated to the patched release and test with a known safe PDF to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from Foxit PDF Reader, crash logs indicating memory access violations, or unexpected network connections post-PDF opening.
Network Indicators:
- Outbound connections to suspicious IPs or domains initiated by Foxit PDF Reader process.
SIEM Query:
Example: 'process_name:"FoxitReader.exe" AND (event_type:"Process Creation" OR event_type:"Crash")'