Rapid7 Vulnerability & Exploit Database

Canon Driver Privilege Escalation

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Canon Driver Privilege Escalation

Disclosed
08/07/2021
Created
08/12/2021

Description

Canon TR150 print drivers versions 3.71.2.10 and below allow local users to read/write files within the "CanonBJ" directory and its subdirectories. By overwriting the DLL at C:\ProgramData\CanonBJ\IJPrinter\CNMWINDOWS\Canon TR150 series\LanguageModules\040C\CNMurGE.dll with a malicious DLL at the right time whilst running the C:\Windows\System32\Printing_Admin_Scripts\en-US\prnmngr.vbs script to install a new printer, a timing issue can be exploited to cause the PrintIsolationHost.exe program, which runs as NT AUTHORITY\SYSTEM, to successfully load the malicious DLL. Successful exploitation will grant attackers code execution as the NT AUTHORITY\SYSTEM user. 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.

Author(s)

  • Jacob Baines
  • Shelby Pace

Platform

Windows

Architectures

x86, x64

Development

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

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