module

macOS cfprefsd Arbitrary File Write Local Privilege Escalation

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Disclosed
03/18/2020
Created
09/05/2020

Description

This module exploits an arbitrary file write in cfprefsd on macOS order to run a payload as root. The CFPreferencesSetAppValue function, which is
reachable from most unsandboxed processes, can be exploited with a race condition
in order to overwrite an arbitrary file as root. By overwriting /etc/pam.d/login
a user can then login as root with the `login root` command without a password.

Authors

Yonghwi Jin Jungwon Lim Insu Yun Taesoo Kim timwr

Platform

OSX

Architectures

x64

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/local/cfprefsd_race_condition
    msf /(n) > show actions
        ...actions...
    msf /(n) > set ACTION < action-name >
    msf /(n) > show options
        ...show and set options...
    msf /(n) > run
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