CVE-2020-19705
📋 TL;DR
This vulnerability allows attackers to execute arbitrary SQL commands through the message submission functionality in thinkphp-zcms. It affects all systems running vulnerable versions of thinkphp-zcms, potentially leading to data theft, modification, or deletion.
💻 Affected Systems
- thinkphp-zcms
📦 What is this software?
Thinkphp Zcms by Thinkphp Zcms Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data exfiltration, modification, or deletion, and potential remote code execution through database functions.
Likely Case
Unauthorized data access, privilege escalation, or data manipulation through SQL injection.
If Mitigated
Limited impact with proper input validation and parameterized queries in place.
🎯 Exploit Status
Exploitation requires sending crafted requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/jorycn/thinkphp-zcms/issues/2
Restart Required: No
Instructions:
No official patch available. Consider applying input validation and using parameterized queries in the affected code.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and sanitization for user inputs in the message submission functionality.
Web Application Firewall (WAF)
allDeploy a WAF to block SQL injection attempts targeting the vulnerable endpoint.
🧯 If You Can't Patch
- Disable the vulnerable message submission endpoint if not required.
- Implement network segmentation to restrict access to the affected system.
🔍 How to Verify
Check if Vulnerable:
Check if the system is running thinkphp-zcms version 20190715 or earlier and has the vulnerable endpoint accessible.Check Version:
Check the version in the application's configuration or documentation.Verify Fix Applied:
Verify that input validation and parameterized queries are implemented in the message submission code.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts or error messages related to database operations
Network Indicators:
- HTTP requests to index.php?m=home&c=message&a=add with SQL injection payloads
SIEM Query:
source="web_logs" AND uri="*index.php?m=home&c=message&a=add*" AND (payload="*UNION*" OR payload="*SELECT*" OR payload="*INSERT*" OR payload="*DELETE*")