130 lines
6.9 KiB
Markdown
130 lines
6.9 KiB
Markdown
# 123/udp - Pentesting NTP
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks\_live)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
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</details>
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<figure><img src="../.gitbook/assets/image (1) (3).png" alt=""><figcaption></figcaption></figure>
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**HackenProof is home to all crypto bug bounties.**
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**Get rewarded without delays**\
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HackenProof bounties launch only when their customers deposit the reward budget. You'll get the reward after the bug is verified.
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**Get experience in web3 pentesting**\
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Blockchain protocols and smart contracts are the new Internet! Master web3 security at its rising days.
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**Become the web3 hacker legend**\
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Gain reputation points with each verified bug and conquer the top of the weekly leaderboard.
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[**Sign up on HackenProof**](https://hackenproof.com/register) start earning from your hacks!
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{% embed url="https://hackenproof.com/register" %}
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## Basic Information
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The Network Time Protocol (**NTP**) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.
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**Default port:** 123/udp
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```
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PORT STATE SERVICE REASON
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123/udp open ntp udp-response
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```
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## Enumeration
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```bash
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ntpq -c readlist <IP_ADDRESS>
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ntpq -c readvar <IP_ADDRESS>
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ntpq -c peers <IP_ADDRESS>
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ntpq -c associations <IP_ADDRESS>
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ntpdc -c monlist <IP_ADDRESS>
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ntpdc -c listpeers <IP_ADDRESS>
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ntpdc -c sysinfo <IP_ADDRESS>
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```
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```bash
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nmap -sU -sV --script "ntp* and (discovery or vuln) and not (dos or brute)" -p 123 <IP>
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```
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## Examine configuration files
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* ntp.conf
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## NTP Amplification Attack
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[**How NTP DDoS Attack Works**](https://resources.infosecinstitute.com/network-time-protocol-ntp-threats-countermeasures/#gref)
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NTP protocol by design uses UDP to operate, which does not require any handshake like TCP, thus no record of the request. So, NTP DDoS amplification attack begins when an attacker crafts packets with a spoofed source IP to make the packets appear to be coming from the intended target and sends them to NTP server. Attacker initially crafts the packet of few bytes, but NTP responds with a large amount of data thus adding to amplification of this attack.
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_MONLIST command_: It is a NTP protocol command which has very little use, but it is this command which is the main culprit for this attack. However, the use of MONLIST command is to give details of the last 600 clients that have connected to the NTP time service. Below is the command syntax:
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```bash
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ntpdc -n -c monlist <IP>
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```
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## Shodan
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* `ntp`
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## HackTricks Automatic Commands
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```
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Protocol_Name: NTP #Protocol Abbreviation if there is one.
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Port_Number: 123 #Comma separated if there is more than one.
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Protocol_Description: Network Time Protocol #Protocol Abbreviation Spelled out
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Entry_1:
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Name: Notes
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Description: Notes for NTP
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Note: |
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The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.
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https://book.hacktricks.xyz/pentesting/pentesting-ntp
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Entry_2:
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Name: Nmap
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Description: Enumerate NTP
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Command: nmap -sU -sV --script "ntp* and (discovery or vuln) and not (dos or brute)" -p 123 {IP}
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```
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<figure><img src="../.gitbook/assets/image (1) (3).png" alt=""><figcaption></figcaption></figure>
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**HackenProof is home to all crypto bug bounties.**
|
||
|
||
**Get rewarded without delays**\
|
||
HackenProof bounties launch only when their customers deposit the reward budget. You'll get the reward after the bug is verified.
|
||
|
||
**Get experience in web3 pentesting**\
|
||
Blockchain protocols and smart contracts are the new Internet! Master web3 security at its rising days.
|
||
|
||
**Become the web3 hacker legend**\
|
||
Gain reputation points with each verified bug and conquer the top of the weekly leaderboard.
|
||
|
||
[**Sign up on HackenProof**](https://hackenproof.com/register) start earning from your hacks!
|
||
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{% embed url="https://hackenproof.com/register" %}
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
||
|
||
* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
||
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks\_live)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
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</details>
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