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HackTheBox - MonitorsFour

HackTheBox - MonitorsFour

Source: YouTube · IppSec · published May 23, 2026 · 1:00:22

Penetration Testing
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Description

The video demonstrates a manual exploitation of the "Monitors 4" Hack The Box machine, bypassing automated tools to manually exploit PHP type juggling and two specific CVEs for privilege escalation.

Key Takeaways:
• The challenge involves fuzzing a token endpoint to discover a PHP type juggling vulnerability, which is the initial entry point 0:11.
• The attacker exploits a CVE within Cacti to achieve Remote Code Execution (RCE) on the target system 0:18.
• A second CVE related to Docker Desktop is exploited to escalate privileges, specifically targeting the Privilegesque component 0:23.
• Although Proof of Concept (PoC) scripts exist on GitHub, the video emphasizes performing these exploits manually to ensure deeper understanding of the underlying mechanics 0:27.

This approach highlights the educational value of manual exploitation over relying solely on automated scripts.

Sources:

  • 0:11 Introduction to the fuzzing phase and PHP type juggling discovery.
  • 0:18 Exploitation of the Cacti CVE for RCE.
  • 0:23 Exploitation of the Docker Desktop CVE for privilege escalation.
  • 0:27 Explanation of why manual exploitation is preferred for learning.

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Estimated credit: 1 CPE hours

Estimate uses the video runtime (1 hour ≈ 1 CPE, rounded to the nearest 0.5, minimum 0.5, maximum 2.0). The final amount can be lower after review, never higher.

Topic: Penetration Testing. Commonly maps to: Security Assessment and Testing, Security Operations. Exact CISSP domains are assigned during generation.

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First 800 characters of the transcript

What's going on, YouTube? This is Ipsac and today we'll be doing Monitors 4 from Hack the Box, which is an easy box, but in typical IPSC fashion, we'll be over complicating it by doing all the exploits manually. There's really just three steps to this box. The first is fuzzing a weird token endpoint to discover it's vulnerable to PHP type juggling and then we exploit two different CVE. The first being within Cacti that gets us remote uh command execution and the second being within Docker Desktop, which is used for Privvesque. Both CVEs do have proof of concept exploits available. So if we just search GitHub, we can do them by just running a Python script. However, we don't learn much that way. So I'll be doing all the exploits manually. It sounds hard, but once you do this enough, you sta…