CVE-2021-28419
📋 TL;DR
CVE-2021-28419 is a time-based blind SQL injection vulnerability in SEO Panel 4.8.0's archive.php file. Attackers can exploit the 'order_col' parameter to extract database information, potentially accessing sensitive data. This affects all deployments running the vulnerable version of SEO Panel.
💻 Affected Systems
- SEO Panel
📦 What is this software?
Seo Panel by Seopanel
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, and potential system takeover.
Likely Case
Extraction of database contents including user credentials, configuration data, and sensitive business information.
If Mitigated
Limited impact with proper input validation and database permissions restricting access to sensitive tables.
🎯 Exploit Status
Time-based blind SQL injection requires automated tools but is well-documented with public proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.8.1 or later
Vendor Advisory: https://github.com/seopanel/Seo-Panel/issues/209
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download and install SEO Panel 4.8.1 or later from the official repository. 3. Replace the vulnerable archive.php file with the patched version. 4. Verify the fix by testing the vulnerable parameter.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the order_col parameter before processing
Modify archive.php to validate order_col parameter against allowed values
Web Application Firewall Rule
allBlock SQL injection patterns in the order_col parameter
Add WAF rule to detect and block SQL injection attempts in order_col parameter
🧯 If You Can't Patch
- Implement strict input validation for all user-supplied parameters
- Restrict database user permissions to minimum required access
🔍 How to Verify
Check if Vulnerable:
Test the archive.php endpoint with SQL injection payloads in the order_col parameter and measure response timesCheck Version:
Check the version.php file or admin panel for SEO Panel version informationVerify Fix Applied:
Attempt SQL injection payloads in order_col parameter and verify they are rejected or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple requests to archive.php with varying order_col parameters
- Long response times from archive.php endpoint
Network Indicators:
- Repeated requests to archive.php with SQL injection patterns
- Unusual traffic patterns to the vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="*archive.php*" AND (query="*order_col*" OR query="*SQL*" OR query="*sleep*" OR query="*benchmark*")