CVE-2022-46497
📋 TL;DR
Hospital Management System 1.0 contains a SQL injection vulnerability in the pat_number parameter at his_doc_view_single_patien.php. This allows attackers to execute arbitrary SQL commands on the database, potentially compromising patient data and system integrity. Healthcare organizations using this specific software version are affected.
💻 Affected Systems
- Hospital Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to patient data theft, system takeover, ransomware deployment, and potential patient safety risks if medical records are altered.
Likely Case
Unauthorized access to patient records, extraction of sensitive medical information, and potential data exfiltration for identity theft or blackmail.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only error messages or limited data exposure.
🎯 Exploit Status
SQL injection is well-understood with many automated tools available. The parameter is directly exposed in the URL/request.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Contact the software vendor for an official patch. 2. If no patch available, implement workarounds immediately. 3. Consider migrating to supported software.
🔧 Temporary Workarounds
Input Validation and Parameterized Queries
allModify the PHP code to use prepared statements with parameterized queries instead of direct string concatenation.
Replace vulnerable code with: $stmt = $conn->prepare('SELECT * FROM patients WHERE pat_number = ?'); $stmt->bind_param('s', $pat_number); $stmt->execute();
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection rules to block malicious requests.
🧯 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 access attempts
🔍 How to Verify
Check if Vulnerable:
Test the his_doc_view_single_patien.php endpoint with SQL injection payloads like: pat_number=1' OR '1'='1Check Version:
Check software documentation or about page for version informationVerify Fix Applied:
Test with the same payloads and verify they are rejected or properly handled without database errors📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in web server logs
- Multiple failed login attempts from single IP
- Database error messages containing SQL fragments
Network Indicators:
- Unusual database query patterns
- Large data transfers from database server
- SQL keywords in HTTP requests to vulnerable endpoint
SIEM Query:
source="web_server" AND (url="*his_doc_view_single_patien.php*" AND (query="*' OR*" OR query="*UNION*" OR query="*SELECT*"))