CVE-2024-30327
📋 TL;DR
This is a use-after-free vulnerability in Foxit PDF Reader's template handling that allows remote attackers to execute arbitrary code when users open malicious PDF files. It affects Foxit PDF Reader installations where users interact with untrusted 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 data exfiltration from the compromised system, often as part of targeted attacks or phishing campaigns.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the PDF reader process.
🎯 Exploit Status
Exploitation requires user interaction but no authentication. The vulnerability has been publicly disclosed through ZDI, increasing likelihood of weaponization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.1.0.23997 and later
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 version 2024.1.0.23997 or later. 4. Restart the application.
🔧 Temporary Workarounds
Disable JavaScript in Foxit Reader
allPrevents JavaScript-based exploitation vectors that might leverage this vulnerability
File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use Protected View
windowsOpen untrusted PDFs in protected/sandboxed mode
File > Preferences > Trust Manager > Enable 'Safe Reading Mode'
🧯 If You Can't Patch
- Restrict user privileges to prevent system-wide compromise if exploited
- Implement application whitelisting to block unauthorized PDF reader execution
🔍 How to Verify
Check if Vulnerable:
Check Foxit Reader version: Open Foxit Reader > Help > About Foxit Reader. If version is below 2024.1.0.23997, system is vulnerable.Check Version:
On Windows: wmic product where name="Foxit Reader" get versionVerify Fix Applied:
Verify version is 2024.1.0.23997 or higher in Help > About Foxit Reader.📡 Detection & Monitoring
Log Indicators:
- Foxit Reader crash logs with memory access violations
- Unexpected child processes spawned from Foxit Reader
Network Indicators:
- Outbound connections from Foxit Reader process to unknown IPs
- DNS requests for suspicious domains after PDF opening
SIEM Query:
process_name:"FoxitReader.exe" AND (event_id:1000 OR event_id:1001) AND exception_code:0xc0000005