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155 lines
7.4 KiB
Markdown
155 lines
7.4 KiB
Markdown
# 110,995 - Pentesting POP
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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## Información Básica
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**Post Office Protocol (POP)** se describe como un protocolo dentro del ámbito de las redes informáticas y de Internet, que se utiliza para la extracción y **recuperación de correos electrónicos de un servidor de correo remoto**, haciéndolos accesibles en el dispositivo local. Posicionado dentro de la capa de aplicación del modelo OSI, este protocolo permite a los usuarios obtener y recibir correos electrónicos. La operación de los **clientes POP** típicamente implica establecer una conexión con el servidor de correo, descargar todos los mensajes, almacenar estos mensajes localmente en el sistema del cliente y posteriormente eliminarlos del servidor. Aunque hay tres iteraciones de este protocolo, **POP3** se destaca como la versión más empleada.
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**Puertos por defecto:** 110, 995(ssl)
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```
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PORT STATE SERVICE
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110/tcp open pop3
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```
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## Enumeración
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### Captura de Banner
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```bash
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nc -nv <IP> 110
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openssl s_client -connect <IP>:995 -crlf -quiet
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```
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## Manual
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Puedes usar el comando `CAPA` para obtener las capacidades del servidor POP3.
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## Automated
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```bash
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nmap --script "pop3-capabilities or pop3-ntlm-info" -sV -port <PORT> <IP> #All are default scripts
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```
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El plugin `pop3-ntlm-info` devolverá algunos datos "**sensibles**" (versiones de Windows).
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### [Fuerza bruta POP3](../generic-methodologies-and-resources/brute-force.md#pop)
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## Sintaxis POP
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Ejemplos de comandos POP de [aquí](http://sunnyoasis.com/services/emailviatelnet.html)
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```bash
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POP commands:
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USER uid Log in as "uid"
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PASS password Substitue "password" for your actual password
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STAT List number of messages, total mailbox size
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LIST List messages and sizes
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RETR n Show message n
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DELE n Mark message n for deletion
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RSET Undo any changes
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QUIT Logout (expunges messages if no RSET)
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TOP msg n Show first n lines of message number msg
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CAPA Get capabilities
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```
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Ejemplo:
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```
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root@kali:~# telnet $ip 110
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+OK beta POP3 server (JAMES POP3 Server 2.3.2) ready
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USER billydean
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+OK
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PASS password
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+OK Welcome billydean
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list
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+OK 2 1807
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1 786
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2 1021
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retr 1
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+OK Message follows
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From: jamesbrown@motown.com
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Dear Billy Dean,
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Here is your login for remote desktop ... try not to forget it this time!
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username: billydean
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password: PA$$W0RD!Z
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```
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## Configuraciones Peligrosas
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From [https://academy.hackthebox.com/module/112/section/1073](https://academy.hackthebox.com/module/112/section/1073)
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| **Configuración** | **Descripción** |
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| ------------------------------- | ----------------------------------------------------------------------------------------- |
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| `auth_debug` | Habilita todos los registros de depuración de autenticación. |
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| `auth_debug_passwords` | Esta configuración ajusta la verbosidad de los registros, las contraseñas enviadas y el esquema se registra. |
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| `auth_verbose` | Registra intentos de autenticación fallidos y sus razones. |
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| `auth_verbose_passwords` | Las contraseñas utilizadas para la autenticación se registran y también pueden ser truncadas. |
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| `auth_anonymous_username` | Esto especifica el nombre de usuario que se utilizará al iniciar sesión con el mecanismo ANONYMOUS SASL. |
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## HackTricks Comandos Automáticos
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```
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Protocol_Name: POP #Protocol Abbreviation if there is one.
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Port_Number: 110 #Comma separated if there is more than one.
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Protocol_Description: Post Office Protocol #Protocol Abbreviation Spelled out
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Entry_1:
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Name: Notes
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Description: Notes for POP
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Note: |
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Post Office Protocol (POP) is described as a protocol within the realm of computer networking and the Internet, which is utilized for the extraction and retrieval of email from a remote mail server**, making it accessible on the local device. Positioned within the application layer of the OSI model, this protocol enables users to fetch and receive email. The operation of POP clients typically involves establishing a connection to the mail server, downloading all messages, storing these messages locally on the client system, and subsequently removing them from the server. Although there are three iterations of this protocol, POP3 stands out as the most prevalently employed version.
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https://book.hacktricks.xyz/network-services-pentesting/pentesting-pop
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Entry_2:
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Name: Banner Grab
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Description: Banner Grab 110
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Command: nc -nv {IP} 110
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Entry_3:
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Name: Banner Grab 995
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Description: Grab Banner Secure
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Command: openssl s_client -connect {IP}:995 -crlf -quiet
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Entry_4:
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Name: Nmap
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Description: Scan for POP info
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Command: nmap --script "pop3-capabilities or pop3-ntlm-info" -sV -p 110 {IP}
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Entry_5:
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Name: Hydra Brute Force
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Description: Need User
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Command: hydra -l {Username} -P {Big_Passwordlist} -f {IP} pop3 -V
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Entry_6:
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Name: consolesless mfs enumeration
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Description: POP3 enumeration without the need to run msfconsole
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Note: sourced from https://github.com/carlospolop/legion
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Command: msfconsole -q -x 'use auxiliary/scanner/pop3/pop3_version; set RHOSTS {IP}; set RPORT 110; run; exit'
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```
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{% hint style="success" %}
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Aprende y practica Hacking en AWS:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Aprende y practica Hacking en GCP: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Apoya a HackTricks</summary>
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* Revisa los [**planes de suscripción**](https://github.com/sponsors/carlospolop)!
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* **Únete al** 💬 [**grupo de Discord**](https://discord.gg/hRep4RUj7f) o al [**grupo de telegram**](https://t.me/peass) o **síguenos** en **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Comparte trucos de hacking enviando PRs a los** [**HackTricks**](https://github.com/carlospolop/hacktricks) y [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) repositorios de github.
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</details>
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{% endhint %}
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