CVE-2024-30335
📋 TL;DR
This vulnerability in Foxit PDF Reader allows attackers to read memory beyond allocated buffers when processing malicious PDF files with AcroForm annotations. It can disclose sensitive information and potentially be combined with other exploits for code execution. Users who open untrusted PDF files with affected Foxit Reader versions are at risk.
💻 Affected Systems
- Foxit PDF Reader
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure combined with other vulnerabilities could lead to arbitrary code execution in the context of the current user, potentially resulting in full system compromise.
Likely Case
Sensitive memory contents disclosure including passwords, keys, or other application data, enabling further attacks.
If Mitigated
Limited impact with proper sandboxing and memory protections, though information disclosure still possible.
🎯 Exploit Status
Requires user interaction to open malicious file. Exploit likely requires combining with other vulnerabilities for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Foxit security bulletins for specific patched version
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Visit Foxit security bulletins page
2. Download latest version of Foxit PDF Reader
3. Install update
4. Restart system
🔧 Temporary Workarounds
Disable PDF opening in Foxit Reader
windowsChange default PDF handler to alternative PDF reader
Windows: Settings > Apps > Default apps > Choose default apps by file type > Select .pdf > Choose alternative PDF reader
Enable Protected View
windowsConfigure Foxit Reader to open untrusted PDFs in protected mode
Foxit Reader: File > Preferences > Trust Manager > Enable Safe Reading Mode
🧯 If You Can't Patch
- Use alternative PDF reader software
- Block PDF downloads from untrusted sources via web proxy or email filtering
🔍 How to Verify
Check if Vulnerable:
Check Foxit Reader version against security bulletinCheck Version:
Foxit Reader: Help > About Foxit ReaderVerify Fix Applied:
Verify installed version matches or exceeds patched version from Foxit advisory📡 Detection & Monitoring
Log Indicators:
- Application crashes in Foxit Reader
- Unusual memory access patterns in application logs
Network Indicators:
- PDF downloads from suspicious sources
- Multiple PDF file accesses from single user
SIEM Query:
source="foxit_reader" AND (event_type="crash" OR event_type="exception")