CVE-2024-25200
📋 TL;DR
Espruino 2v20 contains a stack overflow vulnerability in its JavaScript parser that can be triggered via specially crafted code. This allows attackers to potentially execute arbitrary code or crash the Espruino interpreter. Anyone using Espruino 2v20 with the vulnerable commit is affected.
💻 Affected Systems
- Espruino
📦 What is this software?
Espruino by Espruino
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise of devices running Espruino
Likely Case
Denial of service through interpreter crash, potentially disrupting device functionality
If Mitigated
Limited impact if proper input validation and memory protections are in place
🎯 Exploit Status
Exploitation requires crafting specific JavaScript to trigger the stack overflow
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit fcc9ba4
Vendor Advisory: https://github.com/espruino/Espruino/issues/2457
Restart Required: Yes
Instructions:
1. Update Espruino to latest version 2. Rebuild/redeploy any applications using Espruino 3. Restart affected devices/services
🔧 Temporary Workarounds
Input validation
allImplement strict input validation for JavaScript code processed by Espruino
Memory protection
allEnable stack protection mechanisms if supported by platform
🧯 If You Can't Patch
- Isolate Espruino instances in restricted environments
- Implement network segmentation to limit access to Espruino services
🔍 How to Verify
Check if Vulnerable:
Check Espruino version and verify if using commit fcc9ba4 or earlierCheck Version:
Check Espruino build information or version outputVerify Fix Applied:
Confirm Espruino version is updated beyond vulnerable commit📡 Detection & Monitoring
Log Indicators:
- Espruino interpreter crashes
- Stack overflow error messages
- Abnormal termination logs
Network Indicators:
- Unusual JavaScript payloads sent to Espruino endpoints
SIEM Query:
search 'Espruino' AND ('crash' OR 'overflow' OR 'segmentation fault')