CVE-2022-30557
📋 TL;DR
Foxit PDF Reader and PDF Editor versions before 11.2.2 contain a type confusion vulnerability during JavaScript execution that can cause application crashes. Attackers could potentially exploit this to execute arbitrary code by tricking users into opening malicious PDF files. This affects all users running vulnerable versions of Foxit PDF software.
💻 Affected Systems
- Foxit PDF Reader
- Foxit PDF Editor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the current user, potentially leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) with potential for limited code execution in the context of the PDF reader process.
If Mitigated
Application crash only, with no code execution due to sandboxing or other security controls.
🎯 Exploit Status
Exploitation requires user interaction to open malicious PDF. Type confusion vulnerabilities often lead to memory corruption that can be leveraged for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.2.2 and later
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Open Foxit PDF software. 2. Go to Help > Check for Updates. 3. Follow prompts to download and install version 11.2.2 or later. 4. Restart the application.
🔧 Temporary Workarounds
Disable JavaScript in Foxit
allPrevents JavaScript execution in PDF files, which mitigates this vulnerability.
Open Foxit > File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use alternative PDF viewer
allTemporarily use a different PDF reader that is not affected by this vulnerability.
🧯 If You Can't Patch
- Disable JavaScript in Foxit PDF software
- Implement application whitelisting to block execution of Foxit PDF Reader/Editor
- Use network/web filtering to block PDF downloads from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Foxit PDF version: Open Foxit > Help > About Foxit PDF Reader/Editor. If version is below 11.2.2, you are vulnerable.Check Version:
On Windows: wmic product where name="Foxit PDF Reader" get versionVerify Fix Applied:
Confirm version is 11.2.2 or higher in Help > About, and verify JavaScript is disabled if using workaround.📡 Detection & Monitoring
Log Indicators:
- Application crash logs from Foxit processes
- Unexpected JavaScript execution in PDF files
- Process creation from Foxit PDF executable
Network Indicators:
- PDF file downloads from suspicious sources
- HTTP requests from Foxit processes to unusual domains
SIEM Query:
source="*foxit*" AND (event_type="crash" OR process_name="FoxitPDFReader.exe")