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117 lines
5.7 KiB
Markdown
117 lines
5.7 KiB
Markdown
# 23 - Pentesting Telnet
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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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<figure><img src="/.gitbook/assets/pentest-tools.svg" alt=""><figcaption></figcaption></figure>
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**Instantly available setup for vulnerability assessment & penetration testing**. Run a full pentest from anywhere with 20+ tools & features that go from recon to reporting. We don't replace pentesters - we develop custom tools, detection & exploitation modules to give them back some time to dig deeper, pop shells, and have fun.
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{% embed url="https://pentest-tools.com/?utm_term=jul2024&utm_medium=link&utm_source=hacktricks&utm_campaign=spons" %}
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## **Basic Information**
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Telnet is a network protocol that gives users a UNsecure way to access a computer over a network.
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**Default port:** 23
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```
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23/tcp open telnet
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```
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## **Enumeration**
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### **Banner Grabbing**
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```bash
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nc -vn <IP> 23
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```
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All the interesting enumeration can be performed by **nmap**:
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```bash
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nmap -n -sV -Pn --script "*telnet* and safe" -p 23 <IP>
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```
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The script `telnet-ntlm-info.nse` will obtain NTLM info (Windows versions).
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From the [telnet RFC](https://datatracker.ietf.org/doc/html/rfc854): In the TELNET Protocol are various "**options**" that will be sanctioned and may be used with the "**DO, DON'T, WILL, WON'T**" structure to allow a user and server to agree to use a more elaborate (or perhaps just different) set of conventions for their TELNET connection. Such options could include changing the character set, the echo mode, etc.
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**I know it is possible to enumerate this options but I don't know how, so let me know if know how.**
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### [Brute force](../generic-methodologies-and-resources/brute-force.md#telnet)
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## Config file
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```bash
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/etc/inetd.conf
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/etc/xinetd.d/telnet
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/etc/xinetd.d/stelnet
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```
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## HackTricks Automatic Commands
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```
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Protocol_Name: Telnet #Protocol Abbreviation if there is one.
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Port_Number: 23 #Comma separated if there is more than one.
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Protocol_Description: Telnet #Protocol Abbreviation Spelled out
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Entry_1:
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Name: Notes
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Description: Notes for t=Telnet
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Note: |
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wireshark to hear creds being passed
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tcp.port == 23 and ip.addr != myip
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https://book.hacktricks.xyz/pentesting/pentesting-telnet
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Entry_2:
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Name: Banner Grab
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Description: Grab Telnet Banner
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Command: nc -vn {IP} 23
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Entry_3:
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Name: Nmap with scripts
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Description: Run nmap scripts for telnet
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Command: nmap -n -sV -Pn --script "*telnet*" -p 23 {IP}
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Entry_4:
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Name: consoleless mfs enumeration
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Description: Telnet 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/telnet/telnet_version; set RHOSTS {IP}; set RPORT 23; run; exit' && msfconsole -q -x 'use auxiliary/scanner/telnet/brocade_enable_login; set RHOSTS {IP}; set RPORT 23; run; exit' && msfconsole -q -x 'use auxiliary/scanner/telnet/telnet_encrypt_overflow; set RHOSTS {IP}; set RPORT 23; run; exit' && msfconsole -q -x 'use auxiliary/scanner/telnet/telnet_ruggedcom; set RHOSTS {IP}; set RPORT 23; run; exit'
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```
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<figure><img src="/.gitbook/assets/pentest-tools.svg" alt=""><figcaption></figcaption></figure>
|
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**Instantly available setup for vulnerability assessment & penetration testing**. Run a full pentest from anywhere with 20+ tools & features that go from recon to reporting. We don't replace pentesters - we develop custom tools, detection & exploitation modules to give them back some time to dig deeper, pop shells, and have fun.
|
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{% embed url="https://pentest-tools.com/?utm_term=jul2024&utm_medium=link&utm_source=hacktricks&utm_campaign=spons" %}
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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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