CVE-2021-43362
📋 TL;DR
This SQL injection vulnerability in MedData HBYS allows attackers to execute arbitrary SQL commands on the database. It affects all HBYS installations running versions before 1.1. Successful exploitation could lead to data theft, modification, or complete system compromise.
💻 Affected Systems
- MedData HBYS
📦 What is this software?
Hbys by Meddata
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data exfiltration, modification, deletion, or remote code execution on the database server.
Likely Case
Unauthorized data access, privilege escalation, and potential data manipulation.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permissions in place.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited with automated tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1
Vendor Advisory: Not provided in CVE
Restart Required: Yes
Instructions:
1. Backup database and application. 2. Download HBYS version 1.1 from vendor. 3. Install update following vendor instructions. 4. Restart application services. 5. Verify functionality.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection rules to block exploitation attempts.
Database Permissions
allRestrict database user permissions to minimum required.
🧯 If You Can't Patch
- Implement input validation and parameterized queries in application code.
- Isolate HBYS system from internet and restrict network access.
🔍 How to Verify
Check if Vulnerable:
Check HBYS version in application interface or configuration files. If version < 1.1, system is vulnerable.Check Version:
Check application interface or consult vendor documentation for version check method.Verify Fix Applied:
Confirm HBYS version is 1.1 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts
- Unexpected database errors
Network Indicators:
- SQL injection patterns in HTTP requests
- Unusual database connection patterns
SIEM Query:
SELECT * FROM web_logs WHERE uri CONTAINS 'UNION SELECT' OR uri CONTAINS 'OR 1=1' OR uri CONTAINS ';--'