CVE-2020-22168
📋 TL;DR
CVE-2020-22168 is a SQL injection vulnerability in PHPGurukul Hospital Management System v4.0 that allows remote unauthenticated attackers to execute arbitrary SQL commands. This can lead to unauthorized access to sensitive database information including patient records, user credentials, and system data. Any organization using the vulnerable version of this healthcare 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 resulting in data breach notifications, regulatory fines, and complete system takeover.
Likely Case
Extraction of sensitive patient information and user credentials, enabling further system access and potential data exfiltration.
If Mitigated
Limited or no data exposure if proper input validation and parameterized queries are implemented.
🎯 Exploit Status
Public exploit code is available on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://phpgurukul.com
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement manual fixes as described in workarounds.
🔧 Temporary Workarounds
Input Validation and Parameterized Queries
allModify change-emaild.php to implement proper input validation and use prepared statements with parameterized queries.
Edit hms/change-emaild.php to replace raw SQL queries with PDO or mysqli prepared statements
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting the vulnerable endpoint.
Add WAF rule: deny requests to /hms/change-emaild.php with SQL injection patterns in parameters
🧯 If You Can't Patch
- Restrict network access to the Hospital Management System to trusted IP addresses only
- Implement database monitoring to detect unusual SQL query patterns and unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check if the file hms/change-emaild.php exists and contains unsanitized user input in SQL queries. Test with SQL injection payloads in email parameter.Check Version:
Check the system version in the application interface or configuration files. Look for version 4.0 indicators.Verify Fix Applied:
Verify that change-emaild.php now uses parameterized queries and properly validates all user inputs. Test with SQL injection payloads to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts or SQL injection patterns in access logs
- Unexpected database queries from the application server
Network Indicators:
- HTTP requests to /hms/change-emaild.php containing SQL keywords (UNION, SELECT, etc.)
- Unusual database traffic patterns from the web server
SIEM Query:
source="web_logs" AND uri="/hms/change-emaild.php" AND (payload CONTAINS "UNION" OR payload CONTAINS "SELECT" OR payload CONTAINS "OR 1=1")