CVE-2022-25465
📋 TL;DR
Espruino 2v11 contains a stack buffer overflow vulnerability in the jsvGetNextSibling function in src/jsvar.c. This allows attackers to execute arbitrary code or cause denial of service by triggering memory corruption. Anyone using Espruino 2v11 for embedded JavaScript applications 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, data theft, or device takeover.
Likely Case
Application crash or denial of service due to memory corruption.
If Mitigated
Limited impact if proper memory protections (ASLR, stack canaries) are enabled.
🎯 Exploit Status
Exploitation requires triggering the vulnerable function with crafted input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2v11
Vendor Advisory: https://github.com/espruino/Espruino/issues/2136
Restart Required: Yes
Instructions:
1. Update Espruino to latest version. 2. Recompile any applications using Espruino. 3. Restart affected systems.
🔧 Temporary Workarounds
Disable vulnerable functionality
allAvoid using jsvGetNextSibling function in application code
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks
- Implement strict input validation for Espruino applications
🔍 How to Verify
Check if Vulnerable:
Check Espruino version: if version is 2v11, system is vulnerable.Check Version:
Check Espruino documentation or build configuration for version informationVerify Fix Applied:
Verify Espruino version is newer than 2v11.📡 Detection & Monitoring
Log Indicators:
- Application crashes
- Memory access violation errors
Network Indicators:
- Unusual traffic to Espruino applications
SIEM Query:
Search for 'Espruino crash' or 'segmentation fault' in application logs