module

Ricoh Driver Privilege Escalation

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Disclosed
2020-01-22
Created
2020-02-07

Description

Various Ricoh printer drivers allow escalation of
privileges on Windows systems.

For vulnerable drivers, a low-privileged user can
read/write files within the `RICOH_DRV` directory
and its subdirectories.

`PrintIsolationHost.exe`, a Windows process running
as NT AUTHORITY\SYSTEM, loads driver-specific DLLs
during the installation of a printer. A user can
elevate to SYSTEM by writing a malicious DLL to
the vulnerable driver directory and adding a new
printer with a vulnerable driver.

This module leverages the `prnmngr.vbs` script
to add and delete printers. Multiple runs of this
module may be required given successful exploitation
is time-sensitive.

Authors

Alexander Pudwill
Pentagrid AG
Shelby Pace

Platform

Windows

Architectures

x86, 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/windows/local/ricoh_driver_privesc
    msf exploit(ricoh_driver_privesc) > show targets
        ...targets...
    msf exploit(ricoh_driver_privesc) > set TARGET < target-id >
    msf exploit(ricoh_driver_privesc) > show options
        ...show and set options...
    msf exploit(ricoh_driver_privesc) > exploit
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