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

# Validation

> Verified writeups for the Validation machine of Hack The Box

# Validation

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> SQLi error + INTO OUTFILE → PHP webshell → root</p>

<div className="machine-meta">
  | ·                | ·                                                                 |
  | ---------------- | ----------------------------------------------------------------- |
  | Operating system | Linux                                                             |
  | Difficulty       | Easy                                                              |
  | Vector           | <span className="vbadge vbadge-web">Web</span>                    |
  | IP               | `10.10.11.116`                                                    |
  | Retirement date  | 2021-09-14                                                        |
  | Skills           | SQLI (Error Based) SQLI -> RCE (INTO OUTFILE) Information Leakage |
</div>

## Writeups

| Language | Author                   | Format | Link                                                          |
| -------- | ------------------------ | ------ | ------------------------------------------------------------- |
| 🇪🇸 ES  | **S4vitar**              | Vídeo  | [Open](https://www.youtube.com/watch?v=78i-qbhEUVU)           |
| 🇪🇸 ES  | **El Pingüino de Mario** | Vídeo  | [Open](https://www.youtube.com/watch?v=YSeDv5i4V-I)           |
| 🇬🇧 EN  | **0xdf**                 | Texto  | [Open](https://0xdf.gitlab.io/2021/09/14/htb-validation.html) |
| 🇬🇧 EN  | **IppSec**               | Vídeo  | [Open](https://www.youtube.com/watch?v=UqoVQ4dbYaI)           |

## 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)    |
| SQL Injection               | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/sql-injection/index.html) |
| SQL Injection               | PortSwigger | [Open](https://portswigger.net/web-security/sql-injection)                      |
| Remote Code Execution (RCE) | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/command-injection.html)   |

## Related skills worth mastering

Cross-Site Scripting (XSS) · Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

## If you liked this machine, try

* [Catch](/en/htb/machines/linux/medio/catch) — Linux, Medium
* [Zetta](/en/htb/machines/linux/dificil/zetta) — Linux, Hard
* [Frolic](/en/htb/machines/linux/facil/frolic) — Linux, Easy
* [Europa](/en/htb/machines/linux/medio/europa) — Linux, Medium
* [Seal](/en/htb/machines/linux/medio/seal) — 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:validation" data-giscus-lang="en" />

*Last updated: 2026-06-07*

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