CVE-2020-19111
📋 TL;DR
This vulnerability allows remote attackers to bypass authentication in Online Book Store v1.0 via the admin_verify.php file, enabling unauthorized access to administrative functions and sensitive information. Any system running the vulnerable version is affected.
💻 Affected Systems
- Online Book Store
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the bookstore system including customer data theft, financial fraud, and website defacement.
Likely Case
Unauthorized access to administrative functions leading to data exposure and potential manipulation of book listings or orders.
If Mitigated
Limited to attempted attacks that fail due to proper authentication controls.
🎯 Exploit Status
Exploitation involves simple HTTP requests to bypass authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a secure version if released or implementing workarounds.
🔧 Temporary Workarounds
Implement Proper Authentication
allReplace or modify admin_verify.php to enforce proper authentication checks.
Restrict Access to Admin Panel
linuxUse web server configuration to restrict access to admin directories.
# Apache: Add to .htaccess
Order Deny,Allow
Deny from all
Allow from 192.168.1.0/24
# Nginx: Add to server block
location /admin/ {
allow 192.168.1.0/24;
deny all;
}
🧯 If You Can't Patch
- Remove or rename admin_verify.php file if not essential.
- Implement network-level access controls to restrict admin panel access to trusted IPs only.
🔍 How to Verify
Check if Vulnerable:
Attempt to access admin functions without proper credentials via admin_verify.php.Check Version:
Check application version in source code or configuration files.Verify Fix Applied:
Test that authentication is required for all admin functions.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to admin_verify.php
- Admin panel access from unexpected IPs
Network Indicators:
- HTTP requests to admin_verify.php without authentication headers
SIEM Query:
source="web_logs" AND uri="/admin_verify.php" AND NOT user_authenticated=true