CVE-2020-27242
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary SQL commands on OpenClinic GA systems. Attackers with valid credentials can exploit the SQL injection in the 'listImmoLabels.jsp' page to potentially access, modify, or delete database content. This affects OpenClinic GA version 5.173.3 installations.
💻 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 data exfiltration, system takeover via privilege escalation, and potential lateral movement to other systems.
Likely Case
Unauthorized access to sensitive medical records, modification of patient data, or extraction of administrative credentials from the database.
If Mitigated
Limited impact due to proper input validation, parameterized queries, and database permission restrictions.
🎯 Exploit Status
Exploitation requires valid user credentials but SQL injection payloads are straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.173.4 or later
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2020-1208
Restart Required: Yes
Instructions:
1. Backup database and application files. 2. Download and install OpenClinic GA version 5.173.4 or later from official sources. 3. Restart the application server. 4. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side input validation for the immoLocation parameter to reject SQL injection patterns.
Modify listImmoLabels.jsp to include parameter validation before database queries
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting the vulnerable endpoint.
Configure WAF to block requests containing SQL keywords in immoLocation parameter
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OpenClinic GA from other critical systems
- Enforce principle of least privilege for database accounts used by the application
🔍 How to Verify
Check if Vulnerable:
Test the /listImmoLabels.jsp endpoint with SQL injection payloads in the immoLocation parameter while authenticated.Check Version:
Check OpenClinic GA version in application interface or configuration files.Verify Fix Applied:
Attempt the same SQL injection tests after patching; successful payloads should be rejected or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed authentication attempts followed by SQL injection patterns
- Unusual database query patterns from application user accounts
Network Indicators:
- HTTP requests to /listImmoLabels.jsp containing SQL keywords in parameters
- Unusual database connection patterns from application server
SIEM Query:
source="web_logs" AND uri="/listImmoLabels.jsp" AND (param="immoLocation" AND value CONTAINS "UNION" OR value CONTAINS "SELECT" OR value CONTAINS "OR 1=1")