# 110,995 - Pentesting POP {% hint style="success" %} Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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{% endhint %} ## 基本信息 **邮局协议 (POP)** 被描述为计算机网络和互联网领域的一种协议，用于从远程邮件服务器中提取和**检索电子邮件**，使其在本地设备上可访问。该协议位于OSI模型的应用层，使用户能够获取和接收电子邮件。**POP客户端**的操作通常涉及与邮件服务器建立连接，下载所有消息，将这些消息存储在客户端系统上，然后从服务器中删除它们。尽管该协议有三个版本，但**POP3** 是最常用的版本。 **默认端口：** 110, 995(ssl) ``` PORT STATE SERVICE 110/tcp open pop3 ``` ## 枚举 ### 横幅抓取 ```bash nc -nv 110 openssl s_client -connect :995 -crlf -quiet ``` ## 手动 您可以使用命令 `CAPA` 来获取 POP3 服务器的功能。 ## 自动化 ```bash nmap --script "pop3-capabilities or pop3-ntlm-info" -sV -port #All are default scripts ``` `pop3-ntlm-info` 插件将返回一些 "**敏感**" 数据（Windows 版本）。 ### [POP3 暴力破解](../generic-methodologies-and-resources/brute-force.md#pop) ## POP 语法 POP 命令示例来自 [这里](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 ``` 示例： ``` 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 ``` ## 危险设置 来自 [https://academy.hackthebox.com/module/112/section/1073](https://academy.hackthebox.com/module/112/section/1073) | **设置** | **描述** | | ------------------------- | ----------------------------------------------------------------------------------------- | | `auth_debug` | 启用所有身份验证调试日志。 | | `auth_debug_passwords` | 此设置调整日志详细程度，提交的密码和方案会被记录。 | | `auth_verbose` | 记录未成功的身份验证尝试及其原因。 | | `auth_verbose_passwords` | 用于身份验证的密码会被记录，并且也可能被截断。 | | `auth_anonymous_username` | 指定在使用 ANONYMOUS SASL 机制登录时使用的用户名。 | ## HackTricks 自动命令 ``` 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' ``` {% hint style="success" %} 学习与实践 AWS 黑客技术：[**HackTricks 培训 AWS 红队专家 (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ 学习与实践 GCP 黑客技术：[**HackTricks 培训 GCP 红队专家 (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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