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

# Sink

> Verified writeups for the Sink machine of Hack The Box

# Sink

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> HTTP request smuggling → AWS KMS + Secrets Manager decrypt</p>

<div className="machine-meta">
  | ·                | ·                                                                                                                                                                                        |
  | ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Operating system | Linux                                                                                                                                                                                    |
  | Difficulty       | Insane                                                                                                                                                                                   |
  | Vector           | <span className="vbadge vbadge-linux-privesc">Linux privesc</span>                                                                                                                       |
  | IP               | `10.10.10.225`                                                                                                                                                                           |
  | Retirement date  | 2021-09-18                                                                                                                                                                               |
  | Skills           | HTTP Request Smuggling Exploitation (Leak Admin Cookie) Cookie Hijacking Information Leakage AWS Enumeration AWS Secrets Manager AWS Key\_management Enumeration AWS KMS Decrypting File |
</div>

## Writeups

| Language | Author      | Format | Link                                                    |
| -------- | ----------- | ------ | ------------------------------------------------------- |
| 🇪🇸 ES  | **S4vitar** | Vídeo  | [Open](https://www.youtube.com/watch?v=2qKXz_Rk2YE)     |
| 🇬🇧 EN  | **0xdf**    | Texto  | [Open](https://0xdf.gitlab.io/2021/09/18/htb-sink.html) |
| 🇬🇧 EN  | **IppSec**  | Vídeo  | [Open](https://www.youtube.com/watch?v=8gf5YvvY1yc)     |

## Skill resources

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

| Skill                  | Source      | Link                                                                         |
| ---------------------- | ----------- | ---------------------------------------------------------------------------- |
| HTTP Request Smuggling | PortSwigger | [Open](https://portswigger.net/web-security/request-smuggling)               |
| Information Leakage    | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/information-leak.html) |

## If you liked this machine, try

* [Admirer](/en/htb/machines/linux/facil/admirer) — Linux, Easy
* [Haystack](/en/htb/machines/linux/facil/haystack) — Linux, Easy
* [Luke](/en/htb/machines/linux/medio/luke) — Linux, Medium
* [SneakyMailer](/en/htb/machines/linux/medio/sneakymailer) — Linux, Medium
* [Jerry](/en/htb/machines/windows/facil/jerry) — Windows, Easy

***

## 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:sink" data-giscus-lang="en" />

*Last updated: 2026-06-15*

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