exploit the possibilities

WordPress Easy Comment Uploads Shell Upload

WordPress Easy Comment Uploads Shell Upload
Posted Aug 4, 2012
Authored by Nafsh

WordPress Easy Comment Uploads third party module suffers from a remote shell upload vulnerability as the mime-type check seems to be bypass if the referer is set to wp-admin.

tags | exploit, remote, shell
MD5 | 70f0a57d3680ceac9ae57574db19eb54

WordPress Easy Comment Uploads Shell Upload

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#############################################################################################
# #
# Exploit Title : Wordpress Easy Comment Uploads Shell Upload Vulnerability #
# #
# Author : Nafsh #
# #
# Discovered By : Tapco Security & Research Lab #
# #
# Home : sec-lab.ir #
# #
# Contact : research [at] sec-lab [dot] ir #
# #
# Date : 4/8/2012 - 13:33 #
# #
# Source : plugins.svn.wordpress.org/easy-comment-uploads/tags/0.60/upload.php #
# #
# DorK :

intext:"Invalid referer" inurl:"upload.php" #
# #
#############################################################################################
# POC: In Previous Version You Can Upload Your Shell With Image MimeType
But In New Version You Should Bypass Uploader With Http Refrer Phishing And Change Refrer To /wp-admin
# Source :
<?php
// Check referer
wp_verify_nonce ($_REQUEST ['_wpnonce'], 'ecu_upload_form')
|| write_js ("alert ('Invalid Referer')")
|| die ('Invalid referer');

// Get needed info
$target_dir = ecu_upload_dir_path ();
$target_url = ecu_upload_dir_url ();
$images_only = get_option ('ecu_images_only');
$max_file_size = get_option ('ecu_max_file_size');

if (!file_exists ($target_dir))
mkdir ($target_dir);

$target_path = find_unique_target ($target_dir
. basename($_FILES['file']['name']));
$target_name = basename ($target_path);

// Debugging message example
// write_js ("alert ('$target_url')");

// Default values
$filecode = "";
$filelink = "";

// Detect whether the uploaded file is an image
$is_image = preg_match ('/(jpeg|png|gif)/i', $_FILES['file']['type']);
$type = ($is_image) ? "img" : "file";

if (!$is_image && $images_only) {
$alert = "Sorry, you can only upload images.";
} else if (filetype_blacklisted() && !filetype_whitelisted()) {
$alert = "You are attempting to upload a file with a disallowed/unsafe filetype!";
# #
# #
# http://[TARGET]/wp-content/plugins/wp-vipergb/easy-comment-uploads/upload.php #
# http://[TARGET]/wp-content/plugins/easy-comment-uploads/upload.php
# #
#############################################################################################
# #
# Dem0 : #
# #
# http://www.bulliesofnc.com/wp-content/plugins/wp-vipergb/easy-comment-uploads/upload.php
# #
# http://taymourschool.com/wp/wp-content/plugins/wp-vipergb/easy-comment-uploads/upload.php
# #
# http://equator-indonesia.com/wp-content/plugins/easy-comment-uploads/upload.php
#############################################################################################
# #
# We are : K0242 | Nafsh | Ehram.shahmohamadi #
# #
# Greetz : All sec-lab researchers #
# #
#############################################################################################

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