OS Command Injection in Zyxel NAS products



| Updated: 2023-06-23
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-27992
CWE-ID CWE-78
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
NAS326
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 one high risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU77532

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-27992

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NAS326: 5.21(AAZF.13)C0

NAS540: 5.21(AATB.10)C0

NAS542: 5.21(ABAG.10)C0

CPE2.3 External links

http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



###SIDEBAR###