CVE-2019-25532

Executive Summary

CVE-2019-25532 is a critical SQL injection vulnerability in Netartmedia Jobs Portal version 6.1. The flaw resides in the loginaction.php script, where the Email parameter is directly concatenated into SQL queries without sanitization. An unauthenticated attacker can send crafted POST requests to inject arbitrary SQL commands, leading to data exfiltration, authentication bypass, or full database compromise. The CVSS score of 8.2 reflects the high impact on confidentiality, integrity, and availability, with no privileges required and no user interaction needed. No official patch has been released, making this a persistent threat for any instance running this software.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – The vulnerable component remains the same.
• Confidentiality (C): High (H) – Full database read access.
• Integrity (I): High (H) – Data can be modified or deleted.
• Availability (A): High (H) – Potential denial of service via SQL manipulation.

Threat Level: Critical. The vulnerability is trivial to exploit, has public proof-of-concept code, and no patch exists. Any exposed Jobs Portal instance is at immediate risk.

Deep Dive & Mechanics

The vulnerability exists in the authentication logic of loginaction.php. The application likely constructs a SQL query similar to:

SELECT * FROM users WHERE email = '$email' AND password = '$password'

The $email parameter is taken directly from the POST request without any input validation or parameterized queries. An attacker can inject SQL by providing a value like:

' OR '1'='1' -- 

This transforms the query into:

SELECT * FROM users WHERE email = '' OR '1'='1' -- ' AND password = '...'

The OR '1'='1' condition makes the WHERE clause always true, bypassing authentication. Additionally, UNION-based injection can be used to extract arbitrary data from other tables.

The injection point is the Email field in the POST request to loginaction.php. The attacker does not need to be authenticated, and the attack can be automated with simple HTTP requests.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

<?php
$email = $_POST['Email'];
$password = $_POST['Password'];
$query = "SELECT * FROM users WHERE email = '$email' AND password = '$password'";
$result = mysqli_query($conn, $query);
?>

Patched Code (Conceptual):

<?php
$email = mysqli_real_escape_string($conn, $_POST['Email']);
$password = mysqli_real_escape_string($conn, $_POST['Password']);
$query = "SELECT * FROM users WHERE email = '$email' AND password = '$password'";
$result = mysqli_query($conn, $query);
?>

Or better, using prepared statements:

<?php
$stmt = $conn->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
$stmt->bind_param("ss", $_POST['Email'], $_POST['Password']);
$stmt->execute();
$result = $stmt->get_result();
?>

Since no official patch exists, users must implement these mitigations manually.

Exploitation & Lab Setup

Red Team

Lab Setup:

1. Deploy Netartmedia Jobs Portal 6.1 on a local server (e.g., XAMPP or Docker).
2. Ensure the application is accessible via HTTP.

Exploitation Steps:

1. Authentication Bypass: Send a POST request to http://target/loginaction.php with the following body:

   Email=' OR '1'='1' -- &Password=anything
   

   This will log in as the first user in the database.

2. Data Exfiltration (UNION-based): Use a UNION SELECT to extract data. Example:

   Email=' UNION SELECT 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