CVE-2023-30363
📋 TL;DR
CVE-2023-30363 is a prototype pollution vulnerability in vConsole v3.15.0 that allows attackers to modify JavaScript object prototypes, potentially leading to remote code execution or denial of service. This affects any web application using the vulnerable vConsole library for debugging. Attackers can exploit this by manipulating the setOptions function in core.ts.
💻 Affected Systems
- Tencent vConsole
📦 What is this software?
Vconsole by Tencent
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment on affected web servers.
Likely Case
Denial of service, application instability, or limited data manipulation through prototype pollution.
If Mitigated
Limited impact with proper input validation and security controls, potentially causing minor application errors.
🎯 Exploit Status
Exploitation details are publicly available in GitHub issues. The vulnerability is in client-side JavaScript, making it accessible to any user interacting with the web application.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v3.15.1 or later
Vendor Advisory: https://github.com/Tencent/vConsole/issues/616
Restart Required: No
Instructions:
1. Update vConsole to version 3.15.1 or later. 2. Replace the vulnerable vConsole library in your project. 3. Test the application to ensure compatibility. 4. Deploy the updated version to production.
🔧 Temporary Workarounds
Disable vConsole in Production
allRemove or disable vConsole from production environments since it's primarily a debugging tool.
Remove vConsole import/script tag from production builds
Input Validation
allImplement strict input validation for options passed to vConsole's setOptions function.
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) to restrict script execution
- Use web application firewall (WAF) rules to block malicious payloads targeting prototype pollution
🔍 How to Verify
Check if Vulnerable:
Check if vConsole version 3.15.0 is used in your project by examining package.json or script tags.Check Version:
npm list vconsole or check package.json for "vconsole": "^3.15.1"Verify Fix Applied:
Verify that vConsole is updated to version 3.15.1 or later in your project dependencies.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript errors related to object prototypes
- Unexpected behavior in vConsole functionality
Network Indicators:
- Suspicious payloads in HTTP requests targeting vConsole endpoints
SIEM Query:
Search for logs containing 'vConsole' and 'setOptions' with unusual parameter values