Main Vulnerability Database Vulnerabilities #VU83599

OS Command Injection in NAS326 and NAS542 - CVE-2023-4473

Published: November 30, 2023

Vulnerability identifier: #VU83599

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-4473

CWE-ID: CWE-78

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper input validation in the web server. 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.

Affected software

NAS326
NAS542

How to mitigate CVE-2023-4473

Install updates from vendor's website.

NAS326 - update to 5.21(AAZF.15)C0
NAS542 - update to 5.21(ABAG.12)C0

External References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products

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