CVE-2019-10781
📋 TL;DR
CVE-2019-10781 is a critical vulnerability in schema-inspector versions before 1.6.9 that allows malicious JavaScript objects to bypass both sanitize() and validate() functions. This affects any application using schema-inspector for input validation or sanitization, potentially leading to injection attacks or data corruption. Developers using this library for security validation are directly impacted.
💻 Affected Systems
- schema-inspector
📦 What is this software?
Schema Inspector by Schema Inspector Project
⚠️ Risk & Real-World Impact
Worst Case
Complete bypass of input validation leading to remote code execution, data injection, or privilege escalation depending on how schema-inspector is used in the application.
Likely Case
Injection attacks (XSS, NoSQL injection, etc.) or data corruption when malicious input bypasses validation controls.
If Mitigated
Limited impact if additional validation layers exist or if schema-inspector is used only for non-security critical data formatting.
🎯 Exploit Status
Exploitation requires crafting specific JavaScript objects that bypass validation logic. Public PoCs demonstrate the bypass technique.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.9 and later
Vendor Advisory: https://github.com/Atinux/schema-inspector/commit/345a7b2eed11bb6128421150d65f4f83fdbb737d
Restart Required: No
Instructions:
1. Update schema-inspector to version 1.6.9 or later using npm: npm update schema-inspector
2. Verify the update with: npm list schema-inspector
3. Test your application's validation functionality.
🔧 Temporary Workarounds
Input validation wrapper
allImplement additional validation layer before passing data to schema-inspector functions
Temporary removal
allTemporarily disable or replace schema-inspector usage until patched
npm remove schema-inspector
🧯 If You Can't Patch
- Implement strict input validation using alternative libraries or custom validation logic
- Isolate components using schema-inspector behind additional security controls and monitoring
🔍 How to Verify
Check if Vulnerable:
Check package.json or run: npm list schema-inspector | grep schema-inspectorCheck Version:
npm list schema-inspector | grep schema-inspectorVerify Fix Applied:
Verify installed version is 1.6.9 or higher: npm list schema-inspector📡 Detection & Monitoring
Log Indicators:
- Unexpected validation bypasses
- Unusual input patterns that should have been rejected
- Application errors related to data validation
Network Indicators:
- Unusual data payloads in API requests
- Requests containing crafted JavaScript objects
SIEM Query:
source="application_logs" AND ("validation bypass" OR "schema-inspector" OR "CVE-2019-10781")