CVE-2024-13903
📋 TL;DR
This CVE describes a stack-based buffer overflow vulnerability in quickjs-ng QuickJS JavaScript engine versions up to 0.8.0. The vulnerability in the JS_GetRuntime function allows remote attackers to potentially execute arbitrary code or cause denial of service. Systems using vulnerable versions of quickjs-ng for JavaScript execution are affected.
💻 Affected Systems
- quickjs-ng QuickJS
📦 What is this software?
Quickjs by Quickjs Ng
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service through application crashes or instability in JavaScript execution environments.
If Mitigated
Limited impact due to sandboxing or isolation mechanisms preventing memory corruption from affecting the host system.
🎯 Exploit Status
Remote exploitation is possible but requires specific conditions to trigger the buffer overflow.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.9.0
Vendor Advisory: https://github.com/quickjs-ng/quickjs/releases/tag/v0.9.0
Restart Required: Yes
Instructions:
1. Identify all systems using quickjs-ng
2. Check current version with 'qjs --version' or equivalent
3. Upgrade to version 0.9.0 or later using package manager or manual compilation
4. Restart any services using quickjs-ng
5. Verify the fix with version check
🔧 Temporary Workarounds
Disable JavaScript execution
allTemporarily disable quickjs-ng JavaScript execution if not essential
# System-specific commands to disable quickjs-ng services
Network isolation
allRestrict network access to systems using quickjs-ng
# Use firewall rules to limit inbound connections
🧯 If You Can't Patch
- Implement strict input validation and sanitization for JavaScript code processed by quickjs-ng
- Deploy memory protection mechanisms like ASLR and stack canaries if not already enabled
🔍 How to Verify
Check if Vulnerable:
Check quickjs-ng version with 'qjs --version' or examine package manager output. Versions ≤0.8.0 are vulnerable.Check Version:
qjs --versionVerify Fix Applied:
Confirm version is ≥0.9.0 with 'qjs --version' and test JavaScript execution functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes or abnormal termination of quickjs-ng processes
- Memory access violation errors in system logs
- Unusual JavaScript execution patterns
Network Indicators:
- Unexpected network connections from quickjs-ng processes
- Traffic patterns suggesting exploitation attempts
SIEM Query:
process_name:"qjs" AND (event_type:"crash" OR memory_violation)