CVE-2020-22174
📋 TL;DR
CVE-2020-22174 is a SQL injection vulnerability in PHPGurukul Hospital Management System v4.0 that allows remote unauthenticated attackers to execute arbitrary SQL commands via the book-appointment.php file. This enables attackers to extract sensitive database information including patient records, user credentials, and system data. Any organization using the vulnerable version of this PHP-based hospital management software is affected.
💻 Affected Systems
- PHPGurukul Hospital Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to theft of all patient medical records, financial data, and administrative credentials, potentially enabling further system takeover and data manipulation.
Likely Case
Extraction of sensitive patient information and user credentials, leading to data breaches and potential unauthorized access to the hospital management system.
If Mitigated
Limited information disclosure if proper input validation and database permissions are in place, though SQL injection would still be possible.
🎯 Exploit Status
Public exploit code is available on GitHub, making exploitation trivial for attackers with basic SQL injection knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Review the vulnerable book-appointment.php file
2. Implement proper input validation and parameterized queries
3. Sanitize all user inputs before database interaction
4. Consider upgrading to a newer version if available
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd input validation and sanitization to the book-appointment.php file to prevent SQL injection
# Edit book-appointment.php to implement prepared statements
# Example: Replace direct SQL with mysqli_prepare() or PDO prepared statements
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts
# Configure WAF rules to block SQL injection patterns
# Example mod_security rules for Apache
🧯 If You Can't Patch
- Isolate the system from internet access and restrict to internal network only
- Implement strict network segmentation and monitor all database queries from the application
🔍 How to Verify
Check if Vulnerable:
Check if the system is running PHPGurukul Hospital Management System v4.0 and examine the book-appointment.php file for lack of input validation and parameterized queries.Check Version:
# Check version in system files or database configuration
# Look for version information in admin panel or configuration filesVerify Fix Applied:
Test the book-appointment.php endpoint with SQL injection payloads to ensure they are properly blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts or SQL queries with suspicious patterns
- Requests to book-appointment.php with SQL keywords in parameters
Network Indicators:
- HTTP requests containing SQL injection payloads to the book-appointment.php endpoint
- Unusual database query patterns from the application server
SIEM Query:
source="web_logs" AND uri="/hms/book-appointment.php" AND (query CONTAINS "UNION" OR query CONTAINS "SELECT" OR query CONTAINS "OR 1=1")