CVE-2021-46075
📋 TL;DR
This vulnerability allows staff-level users in Vehicle Service Management System 1.0 to access admin resources and perform CRUD operations they shouldn't have permission for. It affects all deployments of this specific software version where staff accounts exist. This is a privilege escalation flaw that breaks access control boundaries.
💻 Affected Systems
- Sourcecodester Vehicle Service Management System
📦 What is this software?
Vehicle Service Management System by Vehicle Service Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Staff users gain full administrative control, allowing them to modify system configurations, access sensitive data, create/delete accounts, and potentially compromise the entire application.
Likely Case
Staff users access admin-only features like viewing/modifying financial records, changing system settings, or accessing other users' data beyond their intended permissions.
If Mitigated
With proper network segmentation and monitoring, impact is limited to unauthorized access within the application scope, but data integrity could still be compromised.
🎯 Exploit Status
Exploitation requires authenticated staff account. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Implement Role-Based Access Control Validation
allAdd server-side authorization checks for every admin resource endpoint to verify user role before allowing access.
Restrict Admin Interface Access
allConfigure web server to block access to admin URLs/paths from non-admin IP addresses or user roles.
🧯 If You Can't Patch
- Implement network segmentation to isolate the application from critical systems
- Enable detailed logging of all admin resource access attempts and monitor for unauthorized staff user access
🔍 How to Verify
Check if Vulnerable:
Test with staff account: attempt to access admin-only URLs or perform admin operations. Check if authorization bypass occurs.Check Version:
Check application version in admin panel or configuration files.Verify Fix Applied:
Verify that staff accounts cannot access admin resources and receive proper authorization denied responses.📡 Detection & Monitoring
Log Indicators:
- Staff user accessing admin URLs
- CRUD operations from non-admin accounts on admin resources
- Authorization failure logs followed by successful access
Network Indicators:
- HTTP requests to admin endpoints from staff user sessions
- Unusual pattern of administrative actions from non-admin accounts
SIEM Query:
source="web_logs" AND (uri_path CONTAINS "/admin/" OR uri_path CONTAINS "admin_") AND user_role="staff" AND response_code=200🔗 References
- https://github.com/plsanu/Vehicle-Service-Management-System-Multiple-Privilege-Escalation-Leads-to-CRUD-Operations
- https://www.plsanu.com/vehicle-service-management-system-multiple-privilege-escalation-leads-to-crud-operations
- https://github.com/plsanu/Vehicle-Service-Management-System-Multiple-Privilege-Escalation-Leads-to-CRUD-Operations
- https://www.plsanu.com/vehicle-service-management-system-multiple-privilege-escalation-leads-to-crud-operations
