CVE-2020-27244
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary SQL commands through the 'immoCode' parameter in OpenClinic GA's listImmoLabels.jsp page. Successful exploitation could lead to data theft, manipulation, or system compromise. Organizations running vulnerable versions of OpenClinic GA 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 data exfiltration, administrative account takeover, and potential lateral movement to other systems.
Likely Case
Unauthorized access to sensitive medical records, modification of patient data, or extraction of database credentials.
If Mitigated
Limited impact due to proper input validation, parameterized queries, and network segmentation restricting database access.
🎯 Exploit Status
Exploitation requires authenticated access but uses simple SQL injection techniques. Public exploit details are available in the Talos report.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for latest patched version
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2020-1208
Restart Required: Yes
Instructions:
1. Check OpenClinic GA vendor for security updates. 2. Apply the latest patch. 3. Restart the application server. 4. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to restrict 'immoCode' parameter to expected values
Implement regex validation in listImmoLabels.jsp: ^[a-zA-Z0-9_-]+$
WAF Rule
allDeploy web application firewall rules to block SQL injection patterns
ModSecurity rule: SecRule ARGS:immoCode "@detectSQLi" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement network segmentation to isolate the database server from the application server
- Apply principle of least privilege to database accounts used by the application
🔍 How to Verify
Check if Vulnerable:
Test the listImmoLabels.jsp endpoint with SQL injection payloads in the immoCode parameter while authenticatedCheck Version:
Check OpenClinic GA version in application interface or configuration filesVerify Fix Applied:
Attempt SQL injection after patching and verify error responses or lack of database interaction📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by listImmoLabels.jsp access
- HTTP requests with SQL keywords in immoCode parameter
Network Indicators:
- Unusual database connection patterns from application server
- Large data transfers from database to unexpected sources
SIEM Query:
source="web_logs" AND uri="*listImmoLabels.jsp*" AND (param="*immoCode=*'*" OR param="*immoCode=*%27*" OR param="*immoCode=* OR *")