CVE-2023-31910
📋 TL;DR
CVE-2023-31910 is a heap buffer overflow vulnerability in Jerryscript's parser component that could allow arbitrary code execution. This affects systems running vulnerable versions of Jerryscript, a lightweight JavaScript engine commonly embedded in IoT devices and resource-constrained environments. Attackers could exploit this to crash applications or execute malicious code.
💻 Affected Systems
- Jerryscript
📦 What is this software?
Jerryscript by Jerryscript
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or device takeover
Likely Case
Application crash causing denial of service and potential information disclosure via memory leaks
If Mitigated
Contained crash with minimal impact if proper memory protections and sandboxing are implemented
🎯 Exploit Status
Heap buffer overflow vulnerabilities typically require crafting specific JavaScript to trigger the overflow. No public exploit code has been identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issues for specific fix commit
Vendor Advisory: https://github.com/jerryscript-project/jerryscript/issues/5076
Restart Required: Yes
Instructions:
1. Check the GitHub issue #5076 for the specific fix commit. 2. Update Jerryscript to a version containing the fix. 3. Recompile and redeploy any applications using Jerryscript. 4. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for JavaScript processed by Jerryscript
Memory Protection
linuxEnable ASLR and other memory protection mechanisms if available on the platform
🧯 If You Can't Patch
- Isolate Jerryscript instances in containers or sandboxes to limit potential damage
- Implement network segmentation to restrict access to vulnerable systems
🔍 How to Verify
Check if Vulnerable:
Check Jerryscript version and commit hash. If using version 3.0 around commit 05dbbd1, you are vulnerable.Check Version:
Check build configuration or run jerry --version if availableVerify Fix Applied:
Verify the fix commit from GitHub issue #5076 is included in your Jerryscript build📡 Detection & Monitoring
Log Indicators:
- Segmentation faults
- Memory access violation errors
- Unexpected Jerryscript process termination
Network Indicators:
- Unusual JavaScript payloads being sent to Jerryscript endpoints
SIEM Query:
Process termination events for Jerryscript with error codes indicating memory violations