NTLM Injection: A Simple Misconfiguration with Serious Impact 🚨

Introduction

In the ever-evolving landscape of cybersecurity, even the smallest misconfigurations can open the door to devastating vulnerabilities. One such misconfiguration lies in the implementation of NTLM authentication, a protocol that, when improperly configured, can inadvertently disclose sensitive internal network details to attackers. This blog delves into the mechanics of NTLM injection, highlighting its potential risks, impact, and mitigation strategies.

Understanding NTLM Injection

🔍 Vulnerability Type:

The vulnerability stems from the disclosure of internal information through poorly implemented NTLM authentication mechanisms. By exploiting these configurations, attackers can gain access to:

• Hostnames
• Domain names
• NetBIOS details
• Internal DNS information

These details can serve as a goldmine for attackers looking to infiltrate internal networks or launch targeted attacks.

💡 Discovery of the Vulnerability:

During a recent penetration test, I stumbled upon a vulnerability in NTLM authentication…