CVE-2021-46444
📋 TL;DR
CVE-2021-46444 is a SQL injection vulnerability in H.H.G Multistore's admin interface that allows attackers to execute arbitrary SQL commands. This affects all installations of H.H.G Multistore v5.1.0 and below. Attackers can potentially access, modify, or delete database content through the vulnerable /admin/admin.php endpoint.
💻 Affected Systems
- H.H.G Multistore
📦 What is this software?
Multistore by Hhg Multistore
Multistore by Hhg Multistore
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, authentication bypass, and potential remote code execution through database functions.
Likely Case
Unauthorized access to sensitive data including user credentials, payment information, and administrative data, potentially leading to full system compromise.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation preventing database access.
🎯 Exploit Status
Exploitation requires admin access or stolen credentials. The PoC demonstrates straightforward SQL injection via the agID parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.1.1 or later
Vendor Advisory: https://www.hhg-multistore.com/
Restart Required: No
Instructions:
1. Backup database and application files. 2. Download latest version from vendor website. 3. Replace affected files. 4. Test functionality. 5. Monitor for issues.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the agID parameter before processing
Modify /admin/admin.php to add: $agID = intval($_GET['agID']);
WAF Rule
allImplement web application firewall rules to block SQL injection patterns
Add WAF rule: Detect and block SQL keywords in agID parameter
🧯 If You Can't Patch
- Restrict access to /admin/admin.php endpoint using IP whitelisting or authentication
- Implement database user with minimal privileges and enable query logging
🔍 How to Verify
Check if Vulnerable:
Test the endpoint with SQL injection payload: /admin/admin.php?module=admin_group_edit&agID=1' OR '1'='1Check Version:
Check version in application files or admin dashboardVerify Fix Applied:
Verify the same SQL injection payload no longer works and returns proper error handling📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts to admin interface
- Unexpected parameter values in web server logs
Network Indicators:
- SQL keywords in HTTP GET parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/admin/admin.php" AND (param="agID" AND value MATCH "[';]|OR|UNION|SELECT")