CVE-2024-38991
📋 TL;DR
CVE-2024-38991 is a prototype pollution vulnerability in akbr patch-into v1.0.1 that allows attackers to inject arbitrary properties into JavaScript objects. This can lead to remote code execution or denial of service attacks affecting any application using this vulnerable library.
💻 Affected Systems
- akbr patch-into
⚠️ 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
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service causing 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 showing exploitation via property injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Remove akbr patch-into v1.0.1 from your project
2. Find alternative library or implement custom patching functionality
3. Update package.json to exclude vulnerable version
4. Run npm audit fix if available
🔧 Temporary Workarounds
Input validation wrapper
allCreate wrapper function that validates input objects before passing to patchInto
// JavaScript implementation
function safePatchInto(target, source) {
if (typeof source !== 'object' || source === null) {
throw new Error('Invalid source object');
}
// Validate property names don't contain dangerous patterns
const dangerousProps = ['__proto__', 'constructor', 'prototype'];
for (const prop in source) {
if (dangerousProps.includes(prop)) {
throw new Error(`Dangerous property detected: ${prop}`);
}
}
return patchInto(target, source);
}
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) to limit script execution
- Deploy web application firewall (WAF) rules to detect and block prototype pollution attempts
🔍 How to Verify
Check if Vulnerable:
Check package.json for "akbr/patch-into" version 1.0.1 or run: npm list akbr/patch-intoCheck Version:
npm list akbr/patch-intoVerify Fix Applied:
Verify package.json no longer contains akbr/patch-into v1.0.1 and run: npm audit📡 Detection & Monitoring
Log Indicators:
- Unusual property names in object manipulation logs
- Application crashes with prototype-related errors
- Unexpected __proto__ or constructor property assignments
Network Indicators:
- HTTP requests with unusual property names in JSON payloads
- Patterns of property injection attempts
SIEM Query:
source="application.logs" AND ("__proto__" OR "constructor.prototype" OR "prototype pollution")