CVE-2023-31939
📋 TL;DR
This SQL injection vulnerability in Online Travel Agency System v1.0 allows remote attackers to execute arbitrary SQL commands via the costomer_id parameter in customer_edit.php. This can lead to data theft, modification, or deletion. Any organization running this specific travel agency software version is affected.
💻 Affected Systems
- Online Travel Agency System
📦 What is this software?
Online Travel Agency System by Online Travel Agency System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including customer PII theft, financial data exposure, authentication bypass, and potential remote code execution on the database server.
Likely Case
Unauthorized access to customer data, modification of booking records, and potential privilege escalation within the application.
If Mitigated
Attack attempts are logged and blocked with minimal impact due to proper input validation and parameterized queries.
🎯 Exploit Status
Simple SQL injection via GET/POST parameter; exploit code is publicly available in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Implement parameterized queries in customer_edit.php to sanitize costomer_id input.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to ensure costomer_id contains only numeric characters
In customer_edit.php, add: if(!is_numeric($_GET['costomer_id'])) { die('Invalid input'); }
WAF Rule
allImplement web application firewall rules to block SQL injection patterns
ModSecurity rule: SecRule ARGS:costomer_id "@detectSQLi" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Isolate the system behind a WAF with SQL injection protection rules
- Implement network segmentation to limit database server access only to the application server
🔍 How to Verify
Check if Vulnerable:
Test customer_edit.php with payload: customer_edit.php?costomer_id=1' OR '1'='1Check Version:
Check application version in admin panel or readme filesVerify Fix Applied:
Test with same payload; should return error message or no SQL error in response📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts following SQL error patterns
- Requests to customer_edit.php with special characters in parameters
Network Indicators:
- HTTP requests containing SQL keywords (UNION, SELECT, INSERT) in costomer_id parameter
- Abnormal database query patterns from application server
SIEM Query:
source="web_logs" AND uri="*customer_edit.php*" AND (param="*'*" OR param="*--*" OR param="*UNION*" OR param="*SELECT*" OR param="*INSERT*")