CVE-2020-20120
📋 TL;DR
This CVE describes a SQL injection vulnerability in ThinkPHP v3.2.3 and earlier versions. Attackers can exploit improper input validation in the 'where' and 'query' methods to execute arbitrary SQL commands. Organizations using affected ThinkPHP versions in web applications are at risk.
💻 Affected Systems
- ThinkPHP
📦 What is this software?
Thinkphp by Thinkphp
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data manipulation, and potential remote code execution through database functions.
Likely Case
Database information disclosure, data manipulation, and potential privilege escalation within the application.
If Mitigated
Limited impact with proper input validation and parameterized queries in place, though the core vulnerability remains.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized. The GitHub issue contains technical details that could be used to create exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ThinkPHP v3.2.4 and above
Vendor Advisory: https://github.com/top-think/thinkphp/issues/553
Restart Required: No
Instructions:
1. Upgrade ThinkPHP to version 3.2.4 or higher. 2. Update all dependencies. 3. Test application functionality after upgrade.
🔧 Temporary Workarounds
Input Validation Wrapper
allImplement strict input validation for all parameters passed to 'where' and 'query' methods
Parameterized Queries
allRewrite vulnerable queries to use parameterized/prepared statements instead of direct string concatenation
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block SQL injection patterns
- Restrict database user permissions to minimum required access
🔍 How to Verify
Check if Vulnerable:
Check ThinkPHP version in composer.json or framework files. Review code for use of 'where' and 'query' methods with user input.Check Version:
Check composer.json for 'topthink/thinkphp' version or examine ThinkPHP framework files for version informationVerify Fix Applied:
Verify ThinkPHP version is 3.2.4 or higher. Test vulnerable endpoints with SQL injection payloads to confirm they're blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in application logs
- Database error messages containing SQL syntax
- Multiple failed login attempts with SQL-like payloads
Network Indicators:
- HTTP requests containing SQL keywords in parameters
- Unusual database connection patterns from application servers
SIEM Query:
source=web_logs AND (sql OR union OR select OR insert OR update OR delete) AND (where OR query) AND status=200