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 vanaf 'n afstandsposbediener, 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.
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
Logging Passwords
POP-bedieners met die instelling auth_debug geaktiveer sal die logs wat gegenereer word, verhoog. As auth_debug_passwords of auth_verbose_passwords as true gestel is, kan wagwoorde ook in duidelike teks in daardie logs geregistreer word.
HackTricks Automatic Commands
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'
