Improper access control in ZyXEL Communications Corp. products - CVE-2020-13365
Published: August 5, 2020
Vulnerability identifier: #VU34062
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-13365
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ZyXEL Communications Corp.
Affected software:
Zyxel NAS 326
NAS520
NAS540
NAS542
Zyxel NAS 326
NAS520
NAS540
NAS542
Detailed vulnerability description
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in a CGI script for the web application. A remote authenticated attacker can start a Telnet or SSH service and generate a password for the "NsaRescueAngel" user account with root privileges.
How to mitigate CVE-2020-13365
Install updates from vendor's website.