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Safari User-Assisted Applescript Exec Attack

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Safari User-Assisted Applescript Exec Attack

Disclosed
10/16/2015
Created
05/30/2018

Description

In versions of Mac OS X before 10.11.1, the applescript:// URL scheme is provided, which opens the provided script in the Applescript Editor. Pressing cmd-R in the Editor executes the code without any additional confirmation from the user. By getting the user to press cmd-R in Safari, and by hooking the cmd-key keypress event, a user can be tricked into running arbitrary Applescript code. Gatekeeper should be disabled from Security & Privacy in order to avoid the unidentified Developer prompt.

Author(s)

  • joev <joev@metasploit.com>

Platform

OSX,Unix

Architectures

cmd

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/osx/browser/safari_user_assisted_applescript_exec
msf exploit(safari_user_assisted_applescript_exec) > show targets
    ...targets...
msf exploit(safari_user_assisted_applescript_exec) > set TARGET < target-id >
msf exploit(safari_user_assisted_applescript_exec) > show options
    ...show and set options...
msf exploit(safari_user_assisted_applescript_exec) > exploit

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

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