CVE-2020-18877
📋 TL;DR
This SQL injection vulnerability in Wuzhi CMS v4.1.0 allows remote attackers to execute arbitrary SQL commands via the 'flag' parameter in the order administration component. Attackers can potentially extract sensitive database information, modify data, or gain unauthorized access. Organizations running Wuzhi CMS v4.1.0 are affected.
💻 Affected Systems
- Wuzhi CMS
📦 What is this software?
Wuzhicms by Wuzhicms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data theft, data manipulation, and potential privilege escalation to administrative access.
Likely Case
Extraction of sensitive information from the database including user credentials, order data, and configuration details.
If Mitigated
Limited information disclosure if input validation and parameterized queries are implemented.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized and automated exploitation tools exist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.1.1 or later
Vendor Advisory: https://github.com/wuzhicms/wuzhicms/issues/175
Restart Required: No
Instructions:
1. Backup your current installation and database. 2. Download the latest version from the official repository. 3. Replace the vulnerable file /coreframe/app/order/admin/index.php with the patched version. 4. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the 'flag' parameter before processing
Add parameter validation in /coreframe/app/order/admin/index.php before SQL execution
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns
Configure WAF to detect and block SQL injection attempts on /coreframe/app/order/admin/index.php
🧯 If You Can't Patch
- Restrict access to the vulnerable endpoint using IP whitelisting or authentication
- Implement database monitoring to detect unusual SQL queries and access patterns
🔍 How to Verify
Check if Vulnerable:
Test the endpoint /coreframe/app/order/admin/index.php with SQL injection payloads in the 'flag' parameter and observe database errors or unexpected responses.Check Version:
Check the CMS version in the admin panel or review the version file in the installation directory.Verify Fix Applied:
Attempt the same SQL injection tests after patching; successful attacks should be blocked and proper error handling should be in place.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed parameter requests to the vulnerable endpoint
- Database error messages in web server logs
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, etc.) in the 'flag' parameter
- Unusual traffic patterns to the order administration endpoint
SIEM Query:
source="web_server" AND uri="/coreframe/app/order/admin/index.php" AND (query="*SELECT*" OR query="*UNION*" OR query="*OR 1=1*")