CVE-2021-42667
📋 TL;DR
CVE-2021-42667 is a critical SQL injection vulnerability in Sourcecodester's Online Event Booking and Reservation System in PHP. It allows attackers to manipulate SQL queries to extract sensitive data or potentially achieve remote code execution. Organizations using this specific PHP/MySQL event management system are affected.
💻 Affected Systems
- Sourcecodester Online Event Booking and Reservation System in PHP
📦 What is this software?
Online Event Booking And Reservation System by Online Event Booking And Reservation System Project
View all CVEs affecting Online Event Booking And Reservation System →
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Database compromise with extraction of sensitive information including user credentials, personal data, and booking records.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Multiple public proof-of-concept exploits available on GitHub. SQL injection can be leveraged for potential RCE through database functions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check Sourcecodester website for updates 2. Apply parameterized queries to event-management/views 3. Implement input validation 4. Sanitize user inputs
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection rules to block malicious payloads
Input Validation
allImplement strict input validation and sanitization for all user inputs
🧯 If You Can't Patch
- Isolate the system from internet access and restrict to internal network only
- Implement network segmentation and monitor for suspicious database queries
🔍 How to Verify
Check if Vulnerable:
Test SQL injection payloads in event-management/views endpoints or check for unpatched code in vulnerable filesCheck Version:
Check PHP files for vulnerable code patterns in event-management/views directoryVerify Fix Applied:
Verify parameterized queries are implemented and test with SQL injection payloads that should be rejected📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Multiple failed login attempts
- Suspicious database queries from web application
Network Indicators:
- SQL injection payloads in HTTP requests
- Unusual database connection patterns
SIEM Query:
source=web_logs AND (sql OR union OR select OR 1=1) AND status=200🔗 References
- https://github.com/TheHackingRabbi/CVE-2021-42667
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42667
- https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html
- https://github.com/TheHackingRabbi/CVE-2021-42667
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42667
- https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html
