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

# AdmirerToo

> Writeups verificados de la máquina AdmirerToo de Hack The Box

# AdmirerToo

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> Adminer SSRF (CVE-2021-21311) → OpenTSDB RCE → Fail2ban privesc</p>

<div className="cve-row"><span className="cve-row-label">CVE / Boletines:</span> <a className="cve-chip" href="https://nvd.nist.gov/vuln/detail/CVE-2021-21311" target="_blank" rel="noopener">CVE-2021-21311 ↗</a> <a className="cve-chip" href="https://nvd.nist.gov/vuln/detail/CVE-2020-35476" target="_blank" rel="noopener">CVE-2020-35476 ↗</a> <a className="cve-chip" href="https://nvd.nist.gov/vuln/detail/CVE-2021-32749" target="_blank" rel="noopener">CVE-2021-32749 ↗</a></div>

<div className="machine-meta">
  | ·                 | ·                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
  | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Sistema operativo | Linux                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
  | Dificultad        | Difícil                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
  | Vector            | <span className="vbadge vbadge-web">Web</span>                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
  | IP                | `10.10.11.137`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
  | Fecha de retirada | 2022-05-28                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
  | Skills            | Subdomain Enumeration Adminer Enumeration SSRF (Server Side Request Forgery) in Adminer \[CVE-2021-21311] Abusing redirect to discover internal services OpenTSDB Exploitation \[CVE-2020-35476] \[Remote Code Execution] Searching for valid metrics OpenCats PHP Object Injection to Arbitrary File Write Abusing Fail2ban \[Remote Code Execution] (CVE-2021-32749) Playing with phpggc in order to serialize our data Abusing whois config file + OpenCats + Fail2ban \[Privilege Escalation] |
</div>

## Writeups

| Idioma  | Autor       | Formato | Enlace                                                         |
| ------- | ----------- | ------- | -------------------------------------------------------------- |
| 🇪🇸 ES | **S4vitar** | Vídeo   | [Abrir](https://www.youtube.com/watch?v=YmZLdJRBKv0)           |
| 🇬🇧 EN | **0xdf**    | Texto   | [Abrir](https://0xdf.gitlab.io/2022/05/28/htb-admirertoo.html) |
| 🇬🇧 EN | **IppSec**  | Vídeo   | [Abrir](https://www.youtube.com/watch?v=446sWtb5bc4)           |

## Recursos por skill

Documentación curada para cada técnica que aparece en la columna *Skills* de arriba. Fuentes: HackTricks, GTFOBins, PortSwigger, etc.

| Skill                       | Fuente     | Enlace                                                                                                             |
| --------------------------- | ---------- | ------------------------------------------------------------------------------------------------------------------ |
| Remote Code Execution (RCE) | HackTricks | [Abrir](https://book.hacktricks.wiki/en/pentesting-web/command-injection.html)                                     |
| Subdomain Enumeration       | HackTricks | [Abrir](https://book.hacktricks.wiki/en/generic-methodologies-and-resources/external-recon-methodology/index.html) |
| Server-Side Request Forgery | HackTricks | [Abrir](https://book.hacktricks.wiki/en/pentesting-web/ssrf-server-side-request-forgery/index.html)                |

## Skills relacionadas que conviene dominar

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

## Si te gustó esta máquina, prueba

* [Time](/htb/machines/linux/medio/time) — Linux, Medio
* [Stacked](/htb/machines/linux/insano/stacked) — Linux, Insano
* [Undetected](/htb/machines/linux/medio/undetected) — Linux, Medio
* [Meta](/htb/machines/linux/medio/meta) — Linux, Medio
* [RedCross](/htb/machines/linux/medio/redcross) — Linux, Medio

***

## Comentarios y truquillos

¿Algo no funcionó del writeup oficial? ¿Has encontrado un truco mejor? Compártelo aquí — los comentarios viven en [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

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

*Última actualización: 2026-06-07*

<script type="application/ld+json">
  {`{"@context":"https://schema.org","@type":"TechArticle","headline":"AdmirerToo — HTB Writeup Index","name":"AdmirerToo","url":"https://rootea.es/htb/machines/linux/dificil/admirertoo","inLanguage":"es","datePublished":"2022-05-28","dateModified":"2026-06-07","about":{"@type":"Thing","name":"Hack The Box (HTB)"},"keywords":"Remote Code Execution (RCE), Subdomain Enumeration, Server-Side Request Forgery","isPartOf":{"@type":"WebSite","name":"rootea.es","url":"https://rootea.es"},"author":{"@type":"Organization","name":"rootea.es"},"proficiencyLevel":"Difícil"}`}
</script>

<script type="application/ld+json">
  {`{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Inicio","item":"https://rootea.es"},{"@type":"ListItem","position":2,"name":"Linux","item":"https://rootea.es/htb/machines/linux/dificil/index"},{"@type":"ListItem","position":3,"name":"Difícil","item":"https://rootea.es/htb/machines/linux/dificil/index"},{"@type":"ListItem","position":4,"name":"AdmirerToo","item":"https://rootea.es/htb/machines/linux/dificil/admirertoo"}]}`}
</script>