CVE-2024-30332
📋 TL;DR
This is a use-after-free vulnerability in Foxit PDF Reader that allows remote attackers to execute arbitrary code when a user opens a malicious PDF file or visits a malicious webpage. The vulnerability exists in how Doc objects are handled, enabling code execution in the context of the current process. 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 with attacker gaining full control of the affected system, data theft, ransomware deployment, and lateral movement within the network.
Likely Case
Malware installation, credential theft, and system compromise leading to data exfiltration or further attacks.
If Mitigated
Limited impact due to application sandboxing or restricted user privileges, potentially containing the exploit to the application context.
🎯 Exploit Status
User interaction required (opening malicious file). ZDI-CAN-22638 suggests active research and potential exploit development.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version available from Foxit (check vendor advisory for specific version)
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 PDF Reader
allPrevents JavaScript-based exploitation vectors
Open Foxit PDF Reader > File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use alternative PDF viewer
allTemporarily switch to a different PDF reader until patched
🧯 If You Can't Patch
- Restrict PDF file opening to trusted sources only
- Implement application whitelisting to prevent unauthorized PDF reader execution
🔍 How to Verify
Check if Vulnerable:
Check Foxit PDF Reader version against vendor advisory. Versions prior to the patched release are vulnerable.Check Version:
Open Foxit PDF Reader > Help > About Foxit ReaderVerify Fix Applied:
Verify Foxit PDF Reader is updated to the latest version from official vendor sources.📡 Detection & Monitoring
Log Indicators:
- Unexpected Foxit PDF Reader crashes
- Suspicious child processes spawned from Foxit Reader
- Unusual network connections from Foxit Reader process
Network Indicators:
- Outbound connections to suspicious IPs/domains following PDF file opening
- Unusual download patterns associated with PDF files
SIEM Query:
Process Creation where Parent Process Name contains 'FoxitReader.exe' AND (Command Line contains suspicious patterns OR Child Process is unusual)