CVE-2018-25167: Php SQLi — Patch Guide

Overview

A critical security flaw exists in Net-Billetterie version 2.9, allowing attackers to directly manipulate the system’s database. This vulnerability, classified with a High severity rating (CVSS 8.2), is located in the website’s login page.

Vulnerability Details

In simple terms, this is an SQL Injection vulnerability. The system fails to properly check and sanitize user input in the login form. Specifically, the “login” field that accepts a username or email can be exploited.

An attacker can enter specially crafted code-instead of a valid username-into this login box. The system mistakenly treats this malicious code as a legitimate database command. This allows the attacker to execute their own arbitrary SQL queries on the application’s database without needing any login credentials.

Potential Impact

The consequences of this vulnerability are severe. Successful exploitation enables an attacker to:

• Steal Sensitive Data: Extract all information from the database, including administrator and user credentials (usernames and hashed passwords), personal customer data, and transaction records.
• Gain Full Control: Obtain system credentials that could lead to a complete compromise of the server hosting the application.
• Manipulate or Destroy Data: Modify, delete, or corrupt database contents, leading to website defacement, loss of data, and significant operational disruption.

For context on the real-world damage caused by stolen data, you can review historical incidents in our breach reports.

Remediation and Mitigation

Immediate action is required for any site running Net-Billetterie 2.9.

Primary Solution:

• Upgrade Immediately: Contact the software vendor for a patched version. If a direct patch for 2.9 is not available, you must upgrade to a newer, supported version where this vulnerability is fixed. Do not continue running the vulnerable version.

Immediate Mitigations (if upgrade is delayed):

1. Apply Input Validation and Parameterized Queries: A developer must rewrite the vulnerable code in login.inc.php to use parameterized statements (prepared statements). This is the most effective defense, ensuring user input is never interpreted as executable code.
2. Use a Web Application Firewall (WAF): Deploy a WAF and configure it to block SQL injection patterns. This can provide a critical temporary security layer while a permanent code fix is developed and deployed.
3. Network Segmentation: Restrict network access to the affected system to only necessary users and services, limiting the attack surface.

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