CVE-2023-40852
📋 TL;DR
This SQL injection vulnerability in Phpgurukul's User Registration & Login and User Management System allows attackers to bypass authentication and extract sensitive database information by injecting malicious SQL code into the admin username field. Any organization using version 3.0 of this software is affected.
💻 Affected Systems
- Phpgurukul User Registration & Login and User Management System With admin panel
📦 What is this software?
User Registration \& Login And User Management System With Admin Panel by User Registration \& Login And User Management System With Admin Panel Project
View all CVEs affecting User Registration \& Login And User Management System With Admin Panel →
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, and potential remote code execution on the underlying server.
Likely Case
Authentication bypass allowing unauthorized admin access, followed by extraction of user credentials and sensitive data from the database.
If Mitigated
Limited information disclosure if input validation and parameterized queries are properly implemented.
🎯 Exploit Status
Exploit code is publicly available and requires no authentication, making this easily weaponizable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider migrating to alternative software or implementing workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and parameterized queries for all user inputs, especially the admin username field.
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection rules to block malicious payloads.
🧯 If You Can't Patch
- Isolate the affected system from the internet and restrict access to internal networks only.
- Implement network segmentation and monitor for unusual database queries or authentication attempts.
🔍 How to Verify
Check if Vulnerable:
Test the admin login page with SQL injection payloads (e.g., ' OR '1'='1) in the username field and observe if authentication is bypassed or errors are returned.Check Version:
Check the software version in the admin panel or configuration files.Verify Fix Applied:
After implementing workarounds, retest with SQL injection payloads to ensure they are blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts followed by successful login with suspicious usernames
Network Indicators:
- HTTP POST requests to login endpoint containing SQL keywords like UNION, SELECT, OR
SIEM Query:
source="web_logs" AND (url_path="/admin/login.php" OR url_path LIKE "%/admin/login%") AND (request_body LIKE "%OR%" OR request_body LIKE "%UNION%" OR request_body LIKE "%SELECT%")