Multiple vulnerabilities in Zyxel NAS products



Published: 2020-08-05
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-13364
CVE-2020-13365
CWE-ID CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
Zyxel NAS 326
Hardware solutions / Firmware

NAS520
Hardware solutions / Routers for home users

NAS540
Hardware solutions / Routers for home users

NAS542
Hardware solutions / Routers for home users

Vendor ZyXEL Communications Corp.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU34061

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13364

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zyxel NAS 326: before V5.21(AAZF.9)C0

NAS520: before V5.21(AASZ.5)C0

NAS540: before V5.21(AATB.6)C0

NAS542: before V5.21(ABAG.6)C0


CPE2.3 External links

http://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU34062

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13365

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zyxel NAS 326: before V5.21(AAZF.9)C0

NAS520: before V5.21(AASZ.5)C0

NAS540: before V5.21(AATB.6)C0

NAS542: before V5.21(ABAG.6)C0


CPE2.3 External links

http://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###