hacktricks/network-services-pentesting/pentesting-pop.md

# 110,995 - Pentesting POP

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***

## Basic Information

**Post Office Protocol (POP)** word beskryf as 'n protokol binne die domein van rekenaarnetwerke en die Internet, wat gebruik word vir die onttrekking en **herwinning van e-pos van 'n afgeleë posbediener**, wat dit beskikbaar maak op die plaaslike toestel. Geleë binne die toepassingslaag van die OSI-model, stel hierdie protokol gebruikers in staat om e-pos te haal en te ontvang. Die werking van **POP-kliënte** behels tipies die totstandkoming van 'n verbinding met die posbediener, die aflaai van alle boodskappe, die stoor van hierdie boodskappe plaaslik op die kliëntstelsel, en daarna die verwydering daarvan van die bediener. Alhoewel daar drie weergawes van hierdie protokol is, is **POP3** die mees algemeen gebruikte weergawe.

**Default ports:** 110, 995(ssl)
```
PORT    STATE SERVICE
110/tcp open  pop3
```
## Enumerasie

### Banner Grabbing
```bash
nc -nv <IP> 110
openssl s_client -connect <IP>:995 -crlf -quiet
```
## Handmatig

Jy kan die opdrag `CAPA` gebruik om die vermoëns van die POP3 bediener te verkry.

## Geoutomatiseerd
```bash
nmap --script "pop3-capabilities or pop3-ntlm-info" -sV -port <PORT> <IP> #All are default scripts
```
Die `pop3-ntlm-info` plugin sal 'n paar "**sensitiewe**" data teruggee (Windows weergawes).

### [POP3 bruteforce](../generic-methodologies-and-resources/brute-force.md#pop)

## POP-sintaksis

POP-opdragvoorbeelde van [hier](http://sunnyoasis.com/services/emailviatelnet.html)
```bash
POP commands:
USER uid           Log in as "uid"
PASS password      Substitue "password" for your actual password
STAT               List number of messages, total mailbox size
LIST               List messages and sizes
RETR n             Show message n
DELE n             Mark message n for deletion
RSET               Undo any changes
QUIT               Logout (expunges messages if no RSET)
TOP msg n          Show first n lines of message number msg
CAPA               Get capabilities
```
Voorbeeld:
```
root@kali:~# telnet $ip 110
+OK beta POP3 server (JAMES POP3 Server 2.3.2) ready
USER billydean
+OK
PASS password
+OK Welcome billydean

list

+OK 2 1807
1 786
2 1021

retr 1

+OK Message follows
From: jamesbrown@motown.com
Dear Billy Dean,

Here is your login for remote desktop ... try not to forget it this time!
username: billydean
password: PA$$W0RD!Z
```
## Gevaarlike Instellings

Van [https://academy.hackthebox.com/module/112/section/1073](https://academy.hackthebox.com/module/112/section/1073)

| **Instelling**            | **Beskrywing**                                                                           |
| ------------------------- | ----------------------------------------------------------------------------------------- |
| `auth_debug`              | Aktiveer alle outentikasie foutopsporing logboek.                                        |
| `auth_debug_passwords`    | Hierdie instelling pas die log verbositeit aan, die ingediende wagwoorde, en die skema word gelog.  |
| `auth_verbose`            | Log onsuksesvolle outentikasie pogings en hul redes.                                     |
| `auth_verbose_passwords`  | Wagwoorde wat vir outentikasie gebruik word, word gelog en kan ook afgekort word.        |
| `auth_anonymous_username` | Dit spesifiseer die gebruikersnaam wat gebruik moet word wanneer daar met die ANONYMOUS SASL-meganisme aangemeld word. |

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## HackTricks Outomatiese Opdragte
```
Protocol_Name:  POP   #Protocol Abbreviation if there is one.
Port_Number:  110     #Comma separated if there is more than one.
Protocol_Description: Post Office Protocol         #Protocol Abbreviation Spelled out

Entry_1:
Name: Notes
Description: Notes for POP
Note: |
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.

https://book.hacktricks.xyz/network-services-pentesting/pentesting-pop

Entry_2:
Name: Banner Grab
Description: Banner Grab 110
Command: nc -nv {IP} 110

Entry_3:
Name: Banner Grab 995
Description: Grab Banner Secure
Command: openssl s_client -connect {IP}:995 -crlf -quiet

Entry_4:
Name: Nmap
Description: Scan for POP info
Command: nmap --script "pop3-capabilities or pop3-ntlm-info" -sV -p 110 {IP}

Entry_5:
Name: Hydra Brute Force
Description: Need User
Command: hydra -l {Username} -P {Big_Passwordlist} -f {IP} pop3 -V

Entry_6:
Name: consolesless mfs enumeration
Description: POP3 enumeration without the need to run msfconsole
Note: sourced from https://github.com/carlospolop/legion
Command: msfconsole -q -x 'use auxiliary/scanner/pop3/pop3_version; set RHOSTS {IP}; set RPORT 110; run; exit'

```
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