CVE-2023-50753
📋 TL;DR
Online Notice Board System v1.0 contains unauthenticated SQL injection vulnerabilities in the user/update_profile.php endpoint. Attackers can execute arbitrary SQL commands without authentication, potentially compromising the entire database. All deployments of this specific software version are affected.
💻 Affected Systems
- Online Notice Board System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data destruction, and potential remote code execution leading to full system takeover.
Likely Case
Database information disclosure, authentication bypass, and privilege escalation allowing attackers to access sensitive user data.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only allowing data viewing without modification.
🎯 Exploit Status
SQL injection via 'dd' parameter requires no authentication and is trivial to exploit with standard SQLi techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
1. Check vendor website for updated version. 2. If no patch available, implement workarounds. 3. Consider replacing with alternative software.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to sanitize 'dd' parameter before database query
Modify user/update_profile.php to validate 'dd' parameter using prepared statements or parameterized queries
Web Application Firewall
allDeploy WAF with SQL injection protection rules
Configure WAF to block SQL injection patterns targeting /user/update_profile.php
🧯 If You Can't Patch
- Block external access to the vulnerable endpoint using network ACLs or firewall rules
- Implement database-level controls: restrict application database user permissions to minimum required
🔍 How to Verify
Check if Vulnerable:
Test the /user/update_profile.php endpoint with SQL injection payloads in the 'dd' parameterCheck Version:
Check software version in admin panel or configuration filesVerify Fix Applied:
Verify that SQL injection payloads no longer execute and return error messages📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts followed by SQL injection patterns
- Requests to /user/update_profile.php with suspicious 'dd' parameter values
Network Indicators:
- HTTP POST requests to /user/update_profile.php containing SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/user/update_profile.php" AND (param="dd" AND value MATCHES "(?i)(union|select|insert|update|delete|drop|--|#|;)")