CVE-2020-27231
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary SQL commands through the 'findDistrict' parameter in OpenClinic GA's patientslist.do page. Successful exploitation could lead to data theft, modification, or deletion. Only OpenClinic GA 5.173.3 installations with authenticated user access are affected.
💻 Affected Systems
- OpenClinic GA
📦 What is this software?
Openclinic Ga by Openclinic Ga Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including patient health records, administrative credentials, and system takeover through SQL injection leading to remote code execution.
Likely Case
Unauthorized access to sensitive patient data (PHI/PII), manipulation of medical records, or extraction of database contents.
If Mitigated
Limited impact due to proper input validation, parameterized queries, and network segmentation restricting database access.
🎯 Exploit Status
Exploitation requires authenticated access but SQL injection payloads are straightforward. Public exploit details available in Talos reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.173.4 or later
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2020-1205
Restart Required: Yes
Instructions:
1. Backup database and application files. 2. Download OpenClinic GA version 5.173.4 or later. 3. Follow vendor upgrade instructions. 4. Restart application services. 5. Verify fix implementation.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to reject malicious SQL characters in findDistrict parameter
# Web application firewall rule to block SQL injection patterns
# Application code: validate findDistrict parameter contains only alphanumeric characters
Database Access Restriction
allLimit database user permissions to read-only for application accounts accessing patientslist.do
SQL: REVOKE DELETE, UPDATE, DROP, CREATE ON database.* FROM 'appuser'@'localhost';
🧯 If You Can't Patch
- Implement web application firewall with SQL injection rules blocking malicious findDistrict parameter values
- Disable or restrict access to patientslist.do page through network ACLs or authentication controls
🔍 How to Verify
Check if Vulnerable:
Test findDistrict parameter with SQL injection payloads like ' OR '1'='1 and observe database errors or unexpected behaviorCheck Version:
Check OpenClinic GA version in application interface or configuration filesVerify Fix Applied:
Attempt SQL injection payloads against patched version; should receive proper error handling without database interaction📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by patientslist.do access
- HTTP requests with SQL keywords in findDistrict parameter
Network Indicators:
- HTTP POST/GET requests to patientslist.do with suspicious findDistrict values
- Unusual database connection patterns from application server
SIEM Query:
source="web_logs" AND uri="/patientslist.do" AND (param="findDistrict" AND value MATCHES "(?i)(union|select|insert|delete|update|drop|--|'|;)")