CVE-2024-7286: Establishment Billing Management SQLi Flaw

CVE-2024-7286 Overview

A critical SQL injection vulnerability has been identified in SourceCodester Establishment Billing Management System version 1.0. This vulnerability affects the login functionality within the /admin/ajax.php?action=login endpoint, where improper handling of the username parameter allows attackers to inject malicious SQL commands. The vulnerability can be exploited remotely without authentication, potentially enabling unauthorized database access, data exfiltration, and complete system compromise.

Critical Impact

Remote attackers can bypass authentication and gain unauthorized access to the billing management system's database through SQL injection in the login component.

Affected Products

• SourceCodester Establishment Billing Management System 1.0
• Oretnom23 Establishment Billing Management System

Discovery Timeline

• 2024-07-31 - CVE-2024-7286 published to NVD
• 2024-08-12 - Last updated in NVD database

Technical Details for CVE-2024-7286

Vulnerability Analysis

This SQL injection vulnerability exists in the authentication component of the Establishment Billing Management System. The vulnerable endpoint /admin/ajax.php?action=login processes user-supplied input from the username parameter without adequate sanitization or parameterized query implementation. When an attacker submits specially crafted SQL syntax within the username field, the application incorporates this malicious input directly into backend database queries, allowing the attacker to manipulate query logic and potentially extract sensitive data, bypass authentication mechanisms, or modify database contents.

The network-accessible nature of this vulnerability means it can be exploited remotely without requiring prior authentication or user interaction. The exploit details have been publicly disclosed, increasing the risk of widespread exploitation against vulnerable installations.

Root Cause

The root cause of CVE-2024-7286 is the failure to implement proper input validation and parameterized queries (prepared statements) when processing the username parameter in the login functionality. The application directly concatenates user input into SQL queries without escaping or sanitizing special characters, allowing attackers to inject arbitrary SQL commands that are executed by the database server with the application's privileges.

Attack Vector

The attack vector for this vulnerability is network-based, targeting the administrative login functionality. An attacker can craft malicious HTTP requests to the /admin/ajax.php?action=login endpoint with SQL injection payloads embedded in the username parameter. Common attack techniques include:

• Authentication Bypass: Using payloads like ' OR '1'='1 to circumvent login validation
• Union-Based Injection: Extracting database contents through UNION SELECT statements
• Time-Based Blind Injection: Inferring database structure through conditional delays
• Error-Based Injection: Leveraging database error messages to extract information

The vulnerability requires no authentication or special privileges to exploit, making it accessible to any attacker with network access to the vulnerable application.

Detection Methods for CVE-2024-7286

Indicators of Compromise

• Unusual or malformed login requests to /admin/ajax.php?action=login containing SQL syntax characters such as single quotes, double dashes, or UNION keywords
• Database error messages in application logs indicating syntax errors or unexpected query behavior
• Successful authentication events for non-existent or unexpected user accounts
• Evidence of data exfiltration or unauthorized database queries in database audit logs

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in HTTP POST parameters
• Enable detailed logging for the /admin/ajax.php endpoint and monitor for suspicious username parameter values
• Implement database query logging and alert on queries containing injection signatures or unusual patterns
• Use intrusion detection systems (IDS) to identify SQL injection attack traffic targeting the application

Monitoring Recommendations

• Monitor web server access logs for repeated requests to the login endpoint with varying payloads
• Configure alerts for database queries that deviate from expected patterns or contain suspicious syntax
• Review authentication logs for anomalous login successes, especially from unfamiliar IP addresses
• Implement rate limiting on the login endpoint to slow down automated injection attempts

How to Mitigate CVE-2024-7286

Immediate Actions Required

• Restrict network access to the administrative interface (/admin/) to trusted IP addresses only
• Deploy a Web Application Firewall with SQL injection protection enabled
• Disable or restrict public access to the Establishment Billing Management System until a patch is applied
• Review database and application logs for evidence of exploitation attempts

Patch Information

At the time of publication, no official patch from the vendor (SourceCodester/Oretnom23) has been referenced in the available vulnerability data. Organizations should monitor the vendor's official channels and the VulDB entry for patch availability. The GitHub Gist PoC provides additional technical details about the vulnerability.

Workarounds

• Implement parameterized queries (prepared statements) in the login functionality by modifying the source code if possible
• Add input validation to reject usernames containing SQL metacharacters such as single quotes, semicolons, and comment syntax
• Deploy network-level access controls to limit exposure of the administrative interface to internal networks only
• Consider taking the application offline if it contains sensitive data and cannot be adequately protected

# Example: Apache .htaccess to restrict admin access by IP
<Directory "/var/www/html/admin">
    Require ip 192.168.1.0/24
    Require ip 10.0.0.0/8
</Directory>