CVE-2024-30330
📋 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. The vulnerability affects Foxit PDF Reader users who open untrusted PDF documents. Attackers can leverage this to gain control of the affected system.
💻 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, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malware installation or credential theft when users open malicious PDFs from phishing emails or compromised websites.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the PDF reader process.
🎯 Exploit Status
User interaction required (opening malicious PDF), but exploit is unauthenticated once the file is opened. ZDI-CAN-22636 suggests active research and potential weaponization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Foxit security bulletins for specific patched versions
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Open Foxit PDF Reader
2. Go to Help > Check for Updates
3. Follow prompts to install latest version
4. Restart the application
🔧 Temporary Workarounds
Disable JavaScript in Foxit PDF Reader
allPrevents JavaScript execution which may be used in exploitation chains
Open Foxit PDF Reader > File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use Protected View
allOpen PDFs in restricted mode to limit potential damage
Open Foxit PDF Reader > File > Preferences > Trust Manager > Check 'Enable Safe Reading Mode'
🧯 If You Can't Patch
- Use alternative PDF readers that are not affected by this vulnerability
- Block PDF files from untrusted sources at network perimeter
🔍 How to Verify
Check if Vulnerable:
Check Foxit PDF Reader version against patched versions in Foxit security bulletinsCheck Version:
Open Foxit PDF Reader > Help > About Foxit ReaderVerify Fix Applied:
Verify version is updated to latest release and JavaScript is disabled if using workaround📡 Detection & Monitoring
Log Indicators:
- Unexpected Foxit PDF Reader crashes
- Process spawning from Foxit PDF Reader
- Suspicious file access patterns
Network Indicators:
- Outbound connections from Foxit PDF Reader to unknown IPs
- DNS requests for suspicious domains after PDF opening
SIEM Query:
Process:foxitreader.exe AND (EventID:1000 OR ParentProcess:explorer.exe AND ChildProcess:cmd.exe)