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CMS Made Simple (CMSMS) Showtime2 File Upload RCE

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CMS Made Simple (CMSMS) Showtime2 File Upload RCE

Disclosed
03/11/2019
Created
04/22/2019

Description

This module exploits a File Upload vulnerability that lead in a RCE in Showtime2 module (<= 3.6.2) in CMS Made Simple (CMSMS). An authenticated user with "Use Showtime2" privilege could exploit the vulnerability. The vulnerability exists in the Showtime2 module, where the class "class.showtime2_image.php" does not ensure that a watermark file has a standard image file extension (GIF, JPG, JPEG, or PNG). Tested on Showtime2 3.6.2, 3.6.1, 3.6.0, 3.5.4, 3.5.3, 3.5.2, 3.5.1, 3.5.0, 3.4.5, 3.4.3, 3.4.2 on CMS Made Simple (CMSMS) 2.2.9.1

Author(s)

  • Daniele Scanu
  • Fabio Cogno

Platform

PHP

Architectures

php

Development

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/multi/http/cmsms_showtime2_rce
msf exploit(cmsms_showtime2_rce) > show targets
    ...targets...
msf exploit(cmsms_showtime2_rce) > set TARGET < target-id >
msf exploit(cmsms_showtime2_rce) > show options
    ...show and set options...
msf exploit(cmsms_showtime2_rce) > exploit

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