[FD] CVE-2017-12573: command injection in PLANEX CS-W50HD

["kenney_lu@xxxxxxxxxxxxxx" <kenney_lu@xxxxxxxxxxxxxx>]

Reserved CVE: CVE-2017-12573

# Description
The device has a command-injection vulnerability in the web management UI. An 
attacker can send a crafted HTTP POST request to execute arbitrary code. 
Authentication is required before executing the attack.

# Vulnerability Type 
Command Injection

# Affected Product Code Base
firmware ver 030608

# Affected Component
Web management UI

# Attack Type
Remote

# Attack Vectors
Send a crafted HTTP POST request to execute arbitrary code

# Discoverer
Kenney Lu (Trend Micro)

# Vulnerability Detail

The command inject occurs on NAS settings page “/cgi-bin/nasset.cgi”, the input 
parameters is not filtered properly, an attacker can insert command with 
escaped characters or eval function to execute arbitrary code with root 
privilege.

# Status
Fixed in firmware ver 030720


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