CVE-2024-36583
📋 TL;DR
This CVE describes a Prototype Pollution vulnerability in the byondreal accessor library (version <=1.0.0) that allows attackers to modify JavaScript object prototypes. This can lead to arbitrary code execution, denial of service, or privilege escalation in applications using this vulnerable library.
💻 Affected Systems
- @byondreal/accessor
⚠️ 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 exfiltration, or ransomware deployment.
Likely Case
Application compromise allowing data manipulation, privilege escalation within the application, or denial of service.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only causing application crashes.
🎯 Exploit Status
Proof of concept available in GitHub gist references. Prototype pollution vulnerabilities are frequently weaponized due to their potential for RCE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: >1.0.0
Vendor Advisory: https://gist.github.com/mestrtee/97bc2fbfbcbde3a54d5536c9adeee34c
Restart Required: Yes
Instructions:
1. Update package.json to use @byondreal/accessor version >1.0.0
2. Run 'npm update @byondreal/accessor'
3. Restart all affected applications
4. Test application functionality
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and sanitization for all user-controlled data passed to accessor functions.
Object.freeze() on Prototypes
allFreeze Object.prototype and other critical prototypes to prevent pollution.
Object.freeze(Object.prototype);
Object.freeze(Object.prototype.__proto__);
🧯 If You Can't Patch
- Implement WAF rules to detect and block prototype pollution patterns in HTTP requests
- Isolate affected applications in network segments with strict egress filtering
🔍 How to Verify
Check if Vulnerable:
Check package.json or package-lock.json for '@byondreal/accessor' version <=1.0.0Check Version:
npm list @byondreal/accessor | grep @byondreal/accessorVerify Fix Applied:
Verify installed version is >1.0.0 using 'npm list @byondreal/accessor'📡 Detection & Monitoring
Log Indicators:
- Unusual application crashes
- Unexpected prototype modifications in logs
- Suspicious input patterns in accessor calls
Network Indicators:
- HTTP requests with unusual object patterns
- Requests containing __proto__ or constructor properties
SIEM Query:
source="application_logs" AND ("prototype pollution" OR "__proto__" OR "constructor")