> ## Documentation Index
> Fetch the complete documentation index at: https://rootea.es/llms.txt
> Use this file to discover all available pages before exploring further.

# Obscurity

> Verified writeups for the Obscurity machine of Hack The Box

# Obscurity

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> Python code review + URL command injection → shadow race condition</p>

<div className="machine-meta">
  | ·                | ·                                                                                                                                                                                               |
  | ---------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Operating system | Linux                                                                                                                                                                                           |
  | Difficulty       | Medium                                                                                                                                                                                          |
  | Vector           | <span className="vbadge vbadge-linux-privesc">Linux privesc</span>                                                                                                                              |
  | IP               | `10.10.10.168`                                                                                                                                                                                  |
  | Retirement date  | 2020-05-09                                                                                                                                                                                      |
  | Skills           | Information Leakage Python Source Code Analysis URL Command Injection Known Plaintext Attack - Cryptography Challenge Abusing Sudoers Privilege - Shadow Race Condition \[Privilege Escalation] |
</div>

## Writeups

| Language | Author                   | Format | Link                                                         |
| -------- | ------------------------ | ------ | ------------------------------------------------------------ |
| 🇪🇸 ES  | **S4vitar**              | Vídeo  | [Open](https://www.youtube.com/watch?v=chcJmcDrtW4)          |
| 🇪🇸 ES  | **El Pingüino de Mario** | Vídeo  | [Open](https://www.youtube.com/watch?v=LsLnwwP0cNw)          |
| 🇬🇧 EN  | **0xdf**                 | Texto  | [Open](https://0xdf.gitlab.io/2020/05/09/htb-obscurity.html) |
| 🇬🇧 EN  | **IppSec**               | Vídeo  | [Open](https://www.youtube.com/watch?v=veq3w_j0WZQ)          |

## Skill resources

Curated documentation for each technique listed in the *Skills* column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

| Skill                       | Source      | Link                                                                          |
| --------------------------- | ----------- | ----------------------------------------------------------------------------- |
| Information Leakage         | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/information-leak.html)  |
| OS Command Injection        | PortSwigger | [Open](https://portswigger.net/web-security/os-command-injection)             |
| Race Conditions             | PortSwigger | [Open](https://portswigger.net/web-security/race-conditions)                  |
| Remote Code Execution (RCE) | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/command-injection.html) |

## Related skills worth mastering

Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

## If you liked this machine, try

* [Netmon](/en/htb/machines/windows/facil/netmon) — Windows, Easy
* [Seal](/en/htb/machines/linux/medio/seal) — Linux, Medium
* [Frolic](/en/htb/machines/linux/facil/frolic) — Linux, Easy
* [Player](/en/htb/machines/linux/dificil/player) — Linux, Hard
* [Noter](/en/htb/machines/linux/medio/noter) — Linux, Medium

***

## Comments & tips

Did the official writeup not work? Found a smarter trick? Share it here — comments live in [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

<div className="rootea-giscus-wrap" data-giscus-term="machine:obscurity" data-giscus-lang="en" />

*Last updated: 2026-06-15*

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