CVE-2021-46446
📋 TL;DR
CVE-2021-46446 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 with the admin panel accessible. Attackers can potentially access, modify, or delete database content through this vulnerability.
💻 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, or full system takeover via subsequent attacks.
Likely Case
Unauthorized access to sensitive data including user information, configuration data, and potentially administrative credentials.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to admin interface.
🎯 Exploit Status
Exploit requires admin access, but SQL injection is straightforward once authenticated. Public PoC demonstrates exploitation technique.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after v5.1.0
Vendor Advisory: https://www.hhg-multistore.com/
Restart Required: No
Instructions:
1. Upgrade to latest version of H.H.G Multistore. 2. Apply vendor-provided patches if available. 3. Verify the /admin/admin.php endpoint properly sanitizes SQL input.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit access to admin interface using firewall rules or web server configuration
# Example Apache .htaccess:
Order deny,allow
Deny from all
Allow from 192.168.1.0/24
# Example nginx:
location /admin/ {
allow 192.168.1.0/24;
deny all;
}
Web Application Firewall
allDeploy WAF with SQL injection protection rules
# ModSecurity rule example:
SecRule ARGS "@detectSQLi" "id:1000,phase:2,deny"
🧯 If You Can't Patch
- Implement strict network segmentation to isolate admin interface from untrusted networks
- Deploy database monitoring to detect unusual SQL queries and implement query whitelisting
🔍 How to Verify
Check if Vulnerable:
Check if running H.H.G Multistore v5.1.0 or earlier and test /admin/admin.php?module=admin_access_group_edit&aagID parameter for SQL injectionCheck Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Test the vulnerable endpoint with SQL injection payloads after patching to confirm they are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by admin access
- Requests to /admin/admin.php with SQL syntax in parameters
Network Indicators:
- SQL error messages in HTTP responses
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/admin/admin.php" AND (query="UNION" OR query="SELECT" OR query="INSERT" OR query="DELETE")