CVE-2024-38993
📋 TL;DR
CVE-2024-38993 is a prototype pollution vulnerability in rjrodger jsonic-next v2.12.1 that allows attackers to inject arbitrary properties into object prototypes. This can lead to arbitrary code execution or denial of service by manipulating the application's behavior. Anyone using the vulnerable version of jsonic-next is affected.
💻 Affected Systems
- rjrodger jsonic-next
📦 What is this software?
Jsonic by Richardrodger
⚠️ 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, potentially leading to data corruption.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only causing application errors.
🎯 Exploit Status
Proof of concept available in GitHub gists, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.12.2 or later
Vendor Advisory: https://github.com/rjrodger/jsonic-next/security/advisories
Restart Required: Yes
Instructions:
1. Update package.json to use jsonic-next v2.12.2 or later. 2. Run 'npm update jsonic-next' or 'yarn upgrade jsonic-next'. 3. Restart all Node.js applications using the library.
🔧 Temporary Workarounds
Input Validation Wrapper
allWrap jsonic-next calls with strict input validation to reject malicious payloads
// JavaScript example: Validate input objects before passing to jsonic-next functions
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all jsonic-next function inputs
- Deploy web application firewall (WAF) rules to detect and block prototype pollution attempts
🔍 How to Verify
Check if Vulnerable:
Check package.json or package-lock.json for jsonic-next version 2.12.1Check Version:
npm list jsonic-next | grep jsonic-nextVerify Fix Applied:
Verify jsonic-next version is 2.12.2 or higher using 'npm list jsonic-next'📡 Detection & Monitoring
Log Indicators:
- Unexpected property modifications in objects
- Application crashes with prototype-related errors
- Unusual function calls to Object.prototype methods
Network Indicators:
- HTTP requests with specially crafted JSON payloads targeting jsonic-next endpoints
SIEM Query:
source="application.logs" AND ("prototype pollution" OR "jsonic-next" OR "CVE-2024-38993")