CVE-2024-40475
📋 TL;DR
CVE-2024-40475 is an incorrect access control vulnerability in SourceCodester Best House Rental Management System v1.0 that allows unauthorized access to sensitive administrative pages. Attackers can access payment reports, balance reports, invoices, tenant data, and user management without proper authentication. This affects all deployments of the vulnerable software version.
💻 Affected Systems
- SourceCodester Best House Rental Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with unauthorized access to all tenant financial data, payment information, and user credentials, potentially leading to data theft, financial fraud, and system takeover.
Likely Case
Unauthorized viewing and potential modification of sensitive rental data including payment records, tenant information, and user accounts.
If Mitigated
Limited impact with proper authentication and authorization controls preventing unauthorized access to administrative functions.
🎯 Exploit Status
Exploitation involves directly accessing vulnerable PHP endpoints without authentication. Public proof-of-concept documentation exists showing exploitation methodology.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Users should implement workarounds or upgrade to a newer version if available from the vendor.
🔧 Temporary Workarounds
Implement Proper Authentication Middleware
allAdd authentication checks to all vulnerable endpoints to verify user permissions before granting access.
Modify PHP files to include session validation and role-based access control
Web Server Access Control
allUse web server configuration to restrict access to vulnerable endpoints to authorized users only.
Add .htaccess rules for Apache or nginx location blocks to restrict /rental/ directory
🧯 If You Can't Patch
- Implement network segmentation to isolate the application from sensitive networks
- Deploy a web application firewall (WAF) with rules to block unauthorized access to vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Attempt to access /rental/payment_report.php, /rental/balance_report.php, /rental/invoices.php, /rental/tenants.php, or /rental/users.php without authentication. If accessible, the system is vulnerable.Check Version:
Check the application's version information in the admin panel or by examining the source code files.Verify Fix Applied:
Verify that accessing the vulnerable endpoints without proper authentication returns an access denied error or redirects to login page.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /rental/* endpoints without preceding authentication logs
- Multiple failed authentication attempts followed by successful access to restricted endpoints
Network Indicators:
- HTTP requests to vulnerable endpoints without authentication headers or session cookies
- Unusual access patterns to administrative endpoints from non-admin IP addresses
SIEM Query:
web.url:*rental* AND NOT (web.session_id:* OR web.auth_status:success) AND response_code:200