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XXE Injection

Premium room

Exploiting XML External Entities.

medium

60 min

13,383

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Set up your virtual environment

To successfully complete this room, you'll need to set up your virtual environment. This involves starting both your AttackBox (if you're not using your VPN) and Lab Machines, ensuring you're equipped with the necessary tools and access to tackle the challenges ahead.
Attacker machine
Status:Off
Lab machine
Status:Off

Introduction

( External Entity) injection is a type of security flaw that exploits vulnerabilities in an application's XML input. It occurs when an application accepts XML input that includes external entity references within the XML itself. Attackers can leverage this vulnerability to disclose local files, make server-side requests, or execute remote code.

Given the widespread use of XML in web applications, particularly in web services and -based APIs, the severity of these vulnerabilities cannot be underestimated.

Objectives

  1. Recognize the fundamental concepts and dangers associated with XXE injection.
  2. Identify vulnerable XML processing configurations and practices.
  3. Develop techniques for detecting, exploiting, and mitigating XXE vulnerabilities in applications.

Prerequisites

  1. Knowledge of how XML documents are structured, including tags, attributes, and entity references.
  2. Familiarity with how web applications process input and manage data.
  3. Basic knowledge of or .
Answer the questions below
Deploy the target VM attached to this task by pressing the green Start Lab Machine button. After obtaining the machine's generated IP address, you can either use the AttackBox or your own VM connected to TryHackMe's VPN.

After 3 minutes, visit http://MACHINE_IP to access the machine.