CVE-2025-55089
📋 TL;DR
A buffer overflow vulnerability in FileX's RAM disk driver allows remote attackers to execute arbitrary code by sending specially crafted packets. This affects all systems running Eclipse Foundation ThreadX with FileX before version 6.4.2. The vulnerability is particularly dangerous for embedded systems and IoT devices using this file system component.
💻 Affected Systems
- Eclipse Foundation ThreadX with FileX module
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, device takeover, or lateral movement within networks.
Likely Case
Remote code execution allowing attackers to run arbitrary commands, potentially leading to data exfiltration or denial of service.
If Mitigated
Limited impact if network segmentation and proper access controls prevent malicious packets from reaching vulnerable systems.
🎯 Exploit Status
The advisory describes a buffer overflow that can be triggered remotely via crafted packets, suggesting relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FileX 6.4.2
Vendor Advisory: https://github.com/eclipse-threadx/filex/security/advisories/GHSA-467v-6j75-3j7g
Restart Required: Yes
Instructions:
1. Download FileX version 6.4.2 or later from the official repository. 2. Replace the vulnerable FileX module in your ThreadX implementation. 3. Recompile and redeploy the updated firmware/software. 4. Restart affected systems.
🔧 Temporary Workarounds
Network Segmentation
allIsolate systems using vulnerable FileX versions from untrusted networks
Disable RAM Disk Driver
allIf RAM disk functionality is not required, disable the vulnerable driver component
# In ThreadX configuration, set FX_RAM_DISK_ENABLE to 0
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with vulnerable systems
- Deploy intrusion detection systems to monitor for exploitation attempts and anomalous packet patterns
🔍 How to Verify
Check if Vulnerable:
Check the FileX version in your ThreadX implementation. If using source code, examine the FX_VERSION_MAJOR and FX_VERSION_MINOR defines.Check Version:
# Check FX_VERSION_MAJOR and FX_VERSION_MINOR in fx_api.h or similar header filesVerify Fix Applied:
Verify that FileX version is 6.4.2 or higher by checking the version defines or examining the compiled binary.📡 Detection & Monitoring
Log Indicators:
- Unexpected system crashes
- Memory access violations
- Abnormal process creation from FileX-related services
Network Indicators:
- Unusual packet patterns to FileX services
- Traffic to unexpected ports from internal systems
SIEM Query:
source="*" ("FileX" AND ("crash" OR "buffer" OR "overflow")) OR (destination_port IN [FileX_service_ports] AND packet_size > normal_threshold)