CVE-2024-57069
📋 TL;DR
This vulnerability is a prototype pollution flaw in expand-object v0.4.2 that allows attackers to inject properties into JavaScript object prototypes. When exploited, it can cause Denial of Service (DoS) by crashing applications using this library. Anyone using expand-object v0.4.2 in their Node.js applications is affected.
💻 Affected Systems
- expand-object
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash leading to sustained downtime, potential data corruption if application state is disrupted during processing.
Likely Case
Application instability and crashes when processing malicious payloads, resulting in intermittent service disruption.
If Mitigated
Minimal impact with proper input validation and sandboxing, though some performance degradation may occur.
🎯 Exploit Status
Exploitation requires crafting specific payloads to trigger prototype pollution. No public exploit code is available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.4.3 or later
Vendor Advisory: https://github.com/component/expand-object
Restart Required: No
Instructions:
1. Update package.json to use expand-object v0.4.3 or later. 2. Run 'npm update expand-object' or 'yarn upgrade expand-object'. 3. Test application functionality after update.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation to reject malformed objects before passing to expand-object functions.
Object.freeze() on Prototypes
allFreeze Object.prototype and other relevant prototypes to prevent pollution attempts.
Object.freeze(Object.prototype);
🧯 If You Can't Patch
- Implement WAF rules to block suspicious object patterns in incoming requests
- Isolate expand-object usage to separate worker processes with automatic restart on crash
🔍 How to Verify
Check if Vulnerable:
Check package.json or node_modules/expand-object/package.json for version 0.4.2Check Version:
npm list expand-object | grep expand-objectVerify Fix Applied:
Verify expand-object version is 0.4.3 or higher after update📡 Detection & Monitoring
Log Indicators:
- Application crashes with prototype-related errors
- Unusual memory consumption spikes
- Stack traces mentioning expand-object or prototype pollution
Network Indicators:
- Requests containing deeply nested or malformed JSON objects
- Repeated requests causing application restarts
SIEM Query:
source="application.logs" AND ("expand-object" OR "prototype" OR "TypeError") AND ("crash" OR "error" OR "uncaughtException")