CVE-2022-27420
📋 TL;DR
Hospital Management System v1.0 contains a SQL injection vulnerability in the patient_contact parameter of patientsearch.php. This allows attackers to execute arbitrary SQL commands on the database, potentially compromising patient data, system integrity, and administrative access. Any organization using this specific version is affected.
💻 Affected Systems
- Hospital Management System
📦 What is this software?
Hospital Management System by Hospital Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to patient data exfiltration, system takeover via administrative credential theft, and potential ransomware deployment across the healthcare network.
Likely Case
Unauthorized access to patient records (PHI/PII), modification of medical data, and potential privilege escalation to administrative accounts.
If Mitigated
Limited data exposure with proper input validation and parameterized queries preventing successful exploitation.
🎯 Exploit Status
SQL injection via GET/POST parameter requires minimal technical skill. Public GitHub issues demonstrate the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Review the GitHub repository for any security patches or updates. 2. If no official patch exists, implement parameterized queries in patientsearch.php. 3. Replace direct user input concatenation with prepared statements. 4. Validate and sanitize all patient_contact parameter inputs.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block SQL injection patterns in patient_contact parameter
# Example ModSecurity rule: SecRule ARGS:patient_contact "@detectSQLi" "id:1001,phase:2,deny,status:403"
Input Validation Filter
linuxImplement PHP input validation to restrict patient_contact parameter to expected formats
<?php
$patient_contact = filter_input(INPUT_GET, 'patient_contact', FILTER_SANITIZE_STRING);
if (!preg_match('/^[0-9\-\+\s\(\)]{10,15}$/', $patient_contact)) {
die('Invalid contact format');
}
?>
🧯 If You Can't Patch
- Isolate the Hospital Management System behind a reverse proxy with strict input validation
- Implement network segmentation to restrict database access only to necessary application servers
🔍 How to Verify
Check if Vulnerable:
Test patientsearch.php with SQL injection payloads in patient_contact parameter: patientsearch.php?patient_contact=1' OR '1'='1Check Version:
Check application version in admin panel or review source code comments for version informationVerify Fix Applied:
Attempt SQL injection tests and verify they return error messages or are blocked without affecting legitimate queries📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts following SQL error patterns
- Unusual database query patterns from application server
Network Indicators:
- HTTP requests containing SQL keywords (UNION, SELECT, INSERT) in patient_contact parameter
- Abnormal database traffic volume from application server
SIEM Query:
source="web_logs" AND (patient_contact="*' OR*" OR patient_contact="*UNION*" OR patient_contact="*SELECT*" OR patient_contact="*INSERT*")