CVE-2017-12574: Hardcode credential in PLANEX CS-W50HD

["kenney_lu () trendmicro com" <kenney_lu () trendmicro com>]

Reserved CVE: CVE-2017-12574

# Description
A hidden and undocumented account exists that allows attackers to gain unauthorized access and control the device 
completely; the account can't be modified or deleted.

# Vulnerability Type
Default user/password

# Affected Product Code Base
Firmware ver 030608

# Affected Component
Web management UI

# Attack Type
Remote

# Attack Vectors
Use hardcode hidden and undocumented account to access

# Discoverer
Kenney Lu (Trend Micro)

# Vulnerability Detail
A hardcoded credential “supervisor:dangerous” was injected into web authentication database “/.htpasswd" during booting 
process, users can’t change or modify, and the privilege will be administrator.

# Status
Fixed in firmware ver 030720


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