CVE-2021-37358
📋 TL;DR
This is a critical SQL injection vulnerability in SEACMS v210530 that allows remote attackers to execute arbitrary SQL commands via the admin_ajax.php endpoint. Attackers can potentially gain full control of affected systems. All installations using the vulnerable version are affected.
💻 Affected Systems
- SEACMS
📦 What is this software?
Seacms by Seacms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, and persistent backdoor installation
Likely Case
Database exfiltration, privilege escalation, and remote code execution
If Mitigated
Limited data exposure if proper input validation and WAF rules are in place
🎯 Exploit Status
Public exploit code is available and exploitation requires minimal technical skill
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after v210530
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Update to the latest SEACMS version
2. Apply security patches if available from the SEACMS project
3. Verify the admin_ajax.php file has been updated
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the v_name parameter
Modify admin_ajax.php to validate and sanitize all user inputs before processing
Access Restriction
allRestrict access to admin_ajax.php to trusted IP addresses only
Add .htaccess rules or web server configuration to limit access
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with SQL injection rules
- Disable or remove the admin_ajax.php file if not required
🔍 How to Verify
Check if Vulnerable:
Check if SEACMS version is v210530 and test the admin_ajax.php endpoint with SQL injection payloadsCheck Version:
Check SEACMS version in configuration files or admin panelVerify Fix Applied:
Test the vulnerable endpoint with SQL injection payloads to confirm they are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple requests to admin_ajax.php with suspicious parameters
Network Indicators:
- HTTP requests to admin_ajax.php containing SQL keywords like UNION, SELECT, INSERT
SIEM Query:
source="web_logs" AND uri="*admin_ajax.php*" AND (query="*UNION*" OR query="*SELECT*" OR query="*INSERT*")