CVE-2024-32488
📋 TL;DR
This vulnerability allows local attackers to escalate privileges on Windows systems by placing malicious DLL files in the Foxit PDF update-service folder due to weak permissions. It affects Foxit PDF Reader and Editor users with versions before 2024.1. Attackers need local access to the system to exploit this flaw.
💻 Affected Systems
- Foxit PDF Reader
- Foxit PDF Editor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains SYSTEM/administrator privileges, enabling complete system compromise, data theft, malware installation, and persistence.
Likely Case
Local user or malware with limited privileges escalates to administrator rights to install additional malware or access restricted resources.
If Mitigated
With proper folder permissions and user privilege restrictions, exploitation requires administrative access to place DLLs, making attack unlikely.
🎯 Exploit Status
Exploitation requires local access and ability to write to the update-service folder. DLL planting attacks are well-understood techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.1 or later
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Download Foxit PDF Reader/Editor 2024.1 or later from official website. 2. Run installer with administrative privileges. 3. Restart system after installation completes.
🔧 Temporary Workarounds
Restrict update-service folder permissions
windowsModify folder permissions to prevent unauthorized users from writing DLL files to the update-service directory.
icacls "C:\Program Files\Foxit Software\Foxit PDF Reader\update-service" /deny Users:(OI)(CI)W
icacls "C:\Program Files (x86)\Foxit Software\Foxit PDF Reader\update-service" /deny Users:(OI)(CI)W
Disable Foxit update service
windowsStop and disable the Foxit update service to prevent DLL loading from the vulnerable folder.
sc stop FoxitReaderUpdateService
sc config FoxitReaderUpdateService start= disabled
🧯 If You Can't Patch
- Remove write permissions for non-administrative users from the Foxit update-service folder.
- Implement application whitelisting to prevent execution of unauthorized DLLs from the update-service directory.
🔍 How to Verify
Check if Vulnerable:
Check Foxit version via Help > About. If version is below 2024.1, system is vulnerable. Also check folder permissions on update-service directory.Check Version:
wmic product where "name like 'Foxit%'" get versionVerify Fix Applied:
Verify installed version is 2024.1 or higher via Help > About. Check that update-service folder has proper permissions restricting write access.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing DLL loading from Foxit update-service folder by non-standard processes
- File creation events in Foxit update-service directory by non-administrative users
Network Indicators:
- Unusual outbound connections from Foxit processes post-update check
SIEM Query:
source="Windows Security" event_id=4688 process_name="Foxit*.exe" command_line="*update-service*" OR file_path="*update-service*"