CVE-2020-20913
📋 TL;DR
CVE-2020-20913 is a critical SQL injection vulnerability in Ming-Soft MCMS v4.7.2 that allows remote attackers to execute arbitrary SQL commands via the basic_title parameter. This can lead to complete database compromise, data theft, or remote code execution. All organizations running MCMS v4.7.2 are affected.
💻 Affected Systems
- Ming-Soft MCMS
📦 What is this software?
Mcms by Mingsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise including remote code execution, complete database exfiltration, and potential lateral movement to other systems.
Likely Case
Database compromise leading to data theft, privilege escalation, and potential website defacement.
If Mitigated
Limited impact with proper input validation and WAF protection, potentially only error messages or failed queries.
🎯 Exploit Status
SQL injection via basic_title parameter is straightforward to exploit with common SQL injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.7.3 or later
Vendor Advisory: https://github.com/ming-soft/MCMS/issues/27
Restart Required: Yes
Instructions:
1. Backup your database and application files. 2. Download MCMS v4.7.3 or later from official repository. 3. Replace vulnerable files with patched version. 4. Restart web server and application services. 5. Test functionality.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns in basic_title parameter
Input Validation Filter
allImplement server-side input validation to sanitize basic_title parameter before processing
🧯 If You Can't Patch
- Isolate the MCMS instance behind a WAF with SQL injection protection rules
- Implement strict input validation at the application layer for all user inputs
🔍 How to Verify
Check if Vulnerable:
Test if basic_title parameter accepts SQL injection payloads like ' OR '1'='1Check Version:
Check MCMS version in admin panel or read version file in installation directoryVerify Fix Applied:
Verify that SQL injection attempts via basic_title parameter are properly rejected or sanitized📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web server logs
- Unusual database queries from web application
- Multiple failed login attempts or parameter manipulation
Network Indicators:
- HTTP requests with SQL keywords in basic_title parameter
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (basic_title CONTAINS "UNION" OR basic_title CONTAINS "SELECT" OR basic_title CONTAINS "OR '1'='1")