CVE-2020-10505
📋 TL;DR
This SQL injection vulnerability in School Manage System allows attackers to execute arbitrary SQL queries through union-based injection. Attackers can extract database schema and credentials, potentially compromising the entire system. All users of affected versions are at risk.
💻 Affected Systems
- School Manage System by ALLE INFORMATION CO., LTD.
📦 What is this software?
The School Manage System by The School Manage System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, credential harvesting, and potential remote code execution through database functions.
Likely Case
Database schema enumeration and credential theft, enabling unauthorized access to sensitive student/administrator data.
If Mitigated
Limited information disclosure if proper input validation and WAF rules are in place.
🎯 Exploit Status
Union-based SQL injection is well-documented and easily weaponized with automated tools like sqlmap.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2020 version or later
Vendor Advisory: https://www.chtsecurity.com/news/be93c576-e421-489f-9453-a462bdd4c90d
Restart Required: Yes
Instructions:
1. Contact ALLE INFORMATION CO., LTD. for updated version. 2. Backup database and configuration. 3. Install 2020+ version. 4. Restart application services. 5. Verify functionality.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns
# Example ModSecurity rule: SecRule ARGS "union.*select" "id:1001,phase:2,deny,status:403"
Input Validation Filter
allImplement application-level input validation to reject suspicious SQL patterns
# Example PHP filter: if (preg_match('/union.*select/i', $_GET['param'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Isolate the system behind a reverse proxy with strict input filtering
- Implement network segmentation to limit database access from application servers
🔍 How to Verify
Check if Vulnerable:
Test vulnerable endpoints with SQL injection payloads like: ' UNION SELECT 1,2,3--Check Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Attempt SQL injection tests after patch; successful queries should return error pages or be blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing UNION, SELECT, INFORMATION_SCHEMA, or database() patterns
- Unusual database query patterns from application user
Network Indicators:
- SQL error messages in HTTP responses
- Repeated parameter fuzzing attempts
SIEM Query:
source="web_logs" AND ("UNION SELECT" OR "INFORMATION_SCHEMA" OR "database()")