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VMWare Setuid vmware-mount Unsafe popen(3)

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VMWare Setuid vmware-mount Unsafe popen(3)

Disclosed
08/22/2013
Created
05/30/2018

Description

VMWare Workstation (up to and including 9.0.2 build-1031769) and Player have a setuid executable called vmware-mount that invokes lsb_release in the PATH with popen(3). Since PATH is user-controlled, and the default system shell on Debian-derived distributions does not drop privs, we can put an arbitrary payload in an executable called lsb_release and have vmware-mount happily execute it as root for us.

Author(s)

  • Tavis Ormandy
  • egypt <egypt@metasploit.com>

Platform

Linux

Architectures

x86

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