CVE-2024-38988
📋 TL;DR
CVE-2024-38988 is a prototype pollution vulnerability in alizeait unflatto versions up to 1.0.2 that allows attackers to inject arbitrary properties into object prototypes. This can lead to arbitrary code execution or denial of service. Anyone using vulnerable versions of this JavaScript library is affected.
💻 Affected Systems
- alizeait unflatto
📦 What is this software?
Unflatto by Alizeait
⚠️ 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 memory corruption, potentially disrupting dependent services.
If Mitigated
Limited impact if input validation and sanitization prevent malicious payloads from reaching vulnerable functions.
🎯 Exploit Status
Proof of concept available in public gists, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 1.0.2
Vendor Advisory: https://gist.github.com/mestrtee/4c5dfb66bea377889c44dd6c8af28713
Restart Required: Yes
Instructions:
1. Check current version using npm list alizeait-unflatto
2. Update to latest version: npm update alizeait-unflatto
3. Restart all services using the library
4. Verify update with npm list alizeait-unflatto
🔧 Temporary Workarounds
Input Validation Wrapper
allWrap calls to exports.unflatto with strict input validation to reject malicious payloads
// Implement input validation before calling unflatto
// Reject objects with __proto__ or constructor properties
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all data passed to unflatto method
- Isolate affected services in network segments with limited access
🔍 How to Verify
Check if Vulnerable:
Check package.json or run: npm list alizeait-unflatto | grep 1.0.2Check Version:
npm list alizeait-unflattoVerify Fix Applied:
Run: npm list alizeait-unflatto and verify version is > 1.0.2📡 Detection & Monitoring
Log Indicators:
- Unusual process crashes
- Memory allocation errors
- Suspicious property assignments in object logs
Network Indicators:
- Unexpected outbound connections from Node.js processes
- Traffic to known exploit servers
SIEM Query:
source="application.log" AND "unflatto" AND ("crash" OR "memory" OR "prototype")