CVE-2021-37476
📋 TL;DR
This SQL injection vulnerability in NavigateCMS allows attackers to execute arbitrary SQL queries through the 'id' parameter in product.php. Attackers can potentially read, modify, or delete database content, including sensitive user data. All users running NavigateCMS version 2.9.4 or below are affected.
💻 Affected Systems
- NavigateCMS
📦 What is this software?
Navigatecms by Naviwebs
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via subsequent attacks.
Likely Case
Data exfiltration of user credentials, personal information, and CMS configuration data.
If Mitigated
Limited impact with proper input validation and database permissions restricting query execution.
🎯 Exploit Status
SQL injection via POST request requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.9.5 or later
Vendor Advisory: https://github.com/NavigateCMS/Navigate-CMS/issues/26
Restart Required: No
Instructions:
1. Backup your database and files. 2. Download latest version from GitHub. 3. Replace product.php with patched version. 4. Test functionality.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the 'id' parameter before processing.
Modify product.php to validate/sanitize the 'id' parameter using prepared statements or type casting.
WAF Rule
allImplement web application firewall rules to block SQL injection patterns.
Add WAF rule to detect and block SQL injection attempts on product.php POST requests.
🧯 If You Can't Patch
- Implement strict input validation for all user-supplied parameters in product.php
- Restrict database user permissions to minimum required privileges
🔍 How to Verify
Check if Vulnerable:
Test by sending a POST request to product.php with SQL injection payload in 'id' parameter.Check Version:
Check NavigateCMS version in admin panel or configuration files.Verify Fix Applied:
Verify product.php uses prepared statements or proper input validation for the 'id' parameter.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts after product.php access
- POST requests to product.php with suspicious 'id' values
Network Indicators:
- SQL error messages in HTTP responses
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/product.php" AND (method="POST") AND (param="id" AND value MATCHES "[';]|UNION|SELECT")🔗 References
- https://gist.github.com/victomteng1997/ed429fed7de46651c89f05e7591fd4fe
- https://github.com/NavigateCMS/Navigate-CMS
- https://github.com/NavigateCMS/Navigate-CMS/issues/26
- https://gist.github.com/victomteng1997/ed429fed7de46651c89f05e7591fd4fe
- https://github.com/NavigateCMS/Navigate-CMS
- https://github.com/NavigateCMS/Navigate-CMS/issues/26
