CVE-2024-38999
📋 TL;DR
CVE-2024-38999 is a prototype pollution vulnerability in requirejs v2.3.6 that allows attackers to inject arbitrary properties into object prototypes, potentially leading to arbitrary code execution or denial of service. This affects any application using the vulnerable version of requirejs for JavaScript module loading. Attackers can exploit this by manipulating the configuration context.
💻 Affected Systems
- jrburke requirejs
⚠️ 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 persistent backdoor installation.
Likely Case
Denial of service through application crashes or instability, with potential for limited code execution in specific configurations.
If Mitigated
Application instability or crashes without full system compromise if proper sandboxing and input validation are in place.
🎯 Exploit Status
Proof of concept available in public gists, exploitation requires attacker to control input to s.contexts._.configure function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.7 or later
Vendor Advisory: https://github.com/requirejs/requirejs
Restart Required: Yes
Instructions:
1. Update requirejs dependency to version 2.3.7 or later. 2. Update package.json or equivalent dependency file. 3. Run npm update requirejs or equivalent package manager command. 4. Restart all affected applications and services.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict input validation for all configuration inputs to requirejs
Object.freeze on prototypes
allUse Object.freeze() to prevent modification of object prototypes
Object.freeze(Object.prototype);
Object.freeze(Object.getPrototypeOf({}));
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all requirejs configuration inputs
- Deploy web application firewall (WAF) rules to detect and block prototype pollution attempts
🔍 How to Verify
Check if Vulnerable:
Check package.json or equivalent for requirejs version 2.3.6. Run: npm list requirejs or check installed modules.Check Version:
npm list requirejs | grep requirejsVerify Fix Applied:
Verify requirejs version is 2.3.7 or later. Run: npm list requirejs and confirm version.📡 Detection & Monitoring
Log Indicators:
- Unusual configuration requests to requirejs
- Application crashes with prototype-related errors
- Unexpected property assignments in JavaScript objects
Network Indicators:
- HTTP requests with unusual configuration payloads
- Patterns matching prototype pollution attempts in POST data
SIEM Query:
source="application_logs" AND ("requirejs" AND ("configure" OR "prototype")) AND status="error"