CVE-2023-30203
📋 TL;DR
Judging Management System v1.0 contains a SQL injection vulnerability in the result_sheet.php file via the event_id parameter. This allows attackers to execute arbitrary SQL commands on the database. All users running the vulnerable version are affected.
💻 Affected Systems
- Judging Management System
📦 What is this software?
Judging Management System by Judging Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data manipulation, authentication bypass, or remote code execution via database functions.
Likely Case
Unauthorized data access, extraction of sensitive information, and potential privilege escalation.
If Mitigated
Limited impact with proper input validation and database permissions, though SQL injection attempts would still be logged.
🎯 Exploit Status
Simple parameter manipulation; exploit details available in public GitHub repository.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Implement input validation and parameterized queries manually.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize event_id parameter to accept only numeric values
Modify /php-jms/result_sheet.php to validate $_GET['event_id'] with is_numeric() or filter_var()
Web Application Firewall Rule
allBlock SQL injection patterns in the event_id parameter
Add WAF rule: deny requests with SQL keywords in event_id parameter
🧯 If You Can't Patch
- Isolate the system behind a reverse proxy with strict input validation
- Implement network segmentation to limit database access from the application server
🔍 How to Verify
Check if Vulnerable:
Test with payload: /php-jms/result_sheet.php?event_id=1' OR '1'='1Check Version:
Check application version in source code or documentationVerify Fix Applied:
Test with same payload; should return error or no data instead of executing SQL📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in PHP logs
- Multiple requests with SQL keywords in event_id parameter
Network Indicators:
- HTTP requests containing SQL injection patterns in URL parameters
SIEM Query:
source="web_logs" AND (event_id="*' OR*" OR event_id="*UNION*" OR event_id="*SELECT*" OR event_id="*--*")