CVE-2023-35138: OS Command Injection

Published Nov 30, 2023
·
Updated

A command injection vulnerability in the “showzysyncservercontents” function of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted HTTP POST request.

Affected Software

4 affected components
All of the following
Zyxel NAS326<=5.21\(aazf.14\)c0
Zyxel NAS326
All of the following
Zyxel NAS542 firmware<=5.21\(abag.11\)c0
Zyxel NAS542 firmware

Remediation

Patch Available

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

Event History

Nov 30, 2023
CVE Published
01:30 AM
Data Sourced
01:30 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is CVE-2023-35138?

CVE-2023-35138 is a command injection vulnerability in the “show_zysync_server_contents” function of the Zyxel NAS326 and NAS542 firmware.

2

What is the severity of CVE-2023-35138?

The severity of CVE-2023-35138 is critical, with a severity value of 9.8.

3

How does CVE-2023-35138 affect Zyxel NAS326 firmware?

CVE-2023-35138 affects Zyxel NAS326 firmware version V5.21(AAZF.14)C0, allowing an unauthenticated attacker to execute operating system commands.

4

How does CVE-2023-35138 affect Zyxel NAS542 firmware?

CVE-2023-35138 affects Zyxel NAS542 firmware version V5.21(ABAG.11)C0, allowing an unauthenticated attacker to execute operating system commands.

5

How can I fix CVE-2023-35138?

To fix CVE-2023-35138, update your Zyxel NAS326 and NAS542 firmware to a version that is not affected.

Company

Resources

Contact

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