CVE-2024-57432
📋 TL;DR
This vulnerability allows attackers to forge JWT tokens for any user in macrozheng mall-tiny 1.0.1, enabling complete authentication bypass. Attackers can impersonate any user, including administrators, to access protected functionality. All deployments using the default configuration are affected.
💻 Affected Systems
- macrozheng mall-tiny
📦 What is this software?
Mall Tiny by Macrozheng
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative privileges, access all user data, modify system configurations, and potentially execute arbitrary code.
Likely Case
Unauthorized access to user accounts, privilege escalation to administrative functions, and data theft from the application database.
If Mitigated
Limited impact with proper network segmentation and additional authentication layers, but still allows unauthorized access to application functions.
🎯 Exploit Status
Exploitation requires understanding JWT structure and access to the application to obtain a sample token, but no authentication is needed to forge tokens once the hardcoded key is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2 or later
Vendor Advisory: https://github.com/macrozheng/mall-tiny
Restart Required: No
Instructions:
1. Update to version 1.0.2 or later from the official GitHub repository. 2. Replace hardcoded JWT signing keys with secure, randomly generated keys. 3. Implement proper key rotation mechanisms. 4. Remove user information from JWT payload or properly validate it server-side.
🔧 Temporary Workarounds
Implement JWT validation middleware
allAdd server-side validation that checks JWT signatures against a secure key store and validates user claims independently of token contents.
🧯 If You Can't Patch
- Implement network-level controls to restrict access to vulnerable instances
- Deploy a Web Application Firewall (WAF) with JWT validation rules
🔍 How to Verify
Check if Vulnerable:
Check if JWT signing keys are hardcoded in application configuration files and if user information is directly trusted from JWT payload without server-side validation.Check Version:
Check package.json or application manifest for version number, or use: grep -r "version" application.propertiesVerify Fix Applied:
Verify that JWT tokens now use randomly generated keys, implement proper key rotation, and that user privileges are validated server-side independent of token claims.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful logins from unusual locations
- Users accessing functionality outside their normal privilege levels
- JWT tokens with unusual claims or signatures
Network Indicators:
- Unusual authentication patterns
- Requests with modified JWT tokens
- Access to administrative endpoints from non-admin accounts
SIEM Query:
source="application_logs" AND (event="authentication_success" AND user_agent="*" AND NOT location IN normal_locations) OR (event="privilege_escalation" AND success=true)