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Debian/Ubuntu ntfs-3g Local Privilege Escalation

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Debian/Ubuntu ntfs-3g Local Privilege Escalation

Disclosed
01/05/2017
Created
05/30/2018

Description

ntfs-3g mount helper in Ubuntu 16.04, 16.10, Debian 7, 8, and possibly 9 does not properly sanitize the environment when executing modprobe. This can be abused to load a kernel module and execute a binary payload as the root user.

Author(s)

  • jannh <jannh@google.com>
  • h00die <mike@shorebreaksecurity.com>

Platform

Linux

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/linux/local/ntfs3g_priv_esc
msf exploit(ntfs3g_priv_esc) > show targets
    ...targets...
msf exploit(ntfs3g_priv_esc) > set TARGET < target-id >
msf exploit(ntfs3g_priv_esc) > show options
    ...show and set options...
msf exploit(ntfs3g_priv_esc) > 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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