add basic Drupal docs page

docs/content/reference/exploiters/Drupal.md

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+---
+title: "Drupal"
+date: 2020-09-01T08:42:46+03:00
+draft: false
+tags: ["exploit", "linux", "windows"]
+---
+
+The Drupal exploiter exploits [CVE-2019-6340](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6340) 
+on a vulnerable Drupal server.
+
+### Description
+
+Some field types do not properly sanitize data from non-form sources in certain versions
+of Drupal server. This can lead to arbitrary PHP code execution in some cases. 
+
+
+### Affected Versions
+
+* Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10.
+* The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH 
+or POST requests; OR
+* The site has another web services module enabled, like JSON:API in 
+Drupal 8, or Services or RESTful Web Services in Drupal 7.
+
+
+### Notes
+
+* The _Infection Monkey_ exploiter implementation is based on an open-source 
+[Python implementation](https://gist.github.com/leonjza/d0ab053be9b06fa020b66f00358e3d88/f9f6a5bb6605745e292bee3a4079f261d891738a) 
+of the exploit by @leonjza.
+* For the full attack to work, more than one vulnerable URL is required.