Challenge Overview

A custom-built SSH service developed using Erlang has been deployed within a target environment and is suspected to contain critical security flaws. As a penetration tester, your task begins with thorough network reconnaissance to identify exposed services, particularly those running on non-standard ports. During analysis, you uncover an unusual SSH implementation and investigate further by researching known vulnerabilities associated with Erlang-based services. This leads to the discovery of a pre-authentication remote code execution vulnerability. By carefully crafting and executing an exploit, you are able to bypass authentication mechanisms and gain unauthorized root access to the system. With elevated privileges, you navigate the system to locate and retrieve the final flag, demonstrating a successful end-to-end compromise.

What You Will Learn

  • Performing network reconnaissance to identify services on non-standard ports.
  • Analyzing and identifying vulnerabilities in custom-built services.
  • Researching and leveraging known exploits (pre-authentication RCE).
  • Exploiting remote code execution vulnerabilities to gain system access.
  • Privilege escalation and obtaining root-level access to retrieve sensitive data

Program Curriculum

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