CVE-2022-34746: Medium severity zyxel gs1900-8hp firmware vulnerability

Q: What is the vulnerability ID for this security issue?

The vulnerability ID for this security issue is CVE-2022-34746.

Q: What is the severity level of the CVE-2022-34746 vulnerability?

The severity level of the CVE-2022-34746 vulnerability is medium (5.9).

Q: Which Zyxel GS1900 series firmware versions are affected by this vulnerability?

Zyxel GS1900 series firmware versions prior to V2.70 are affected by this vulnerability.

Q: How can an attacker exploit this vulnerability?

An unauthenticated attacker can exploit this vulnerability to retrieve a private key by factoring the insufficiently generated RSA key pair.

Q: Is there a fix available for the CVE-2022-34746 vulnerability?

Yes, a fix is available for the CVE-2022-34746 vulnerability. It is recommended to update to firmware version V2.70 or higher.

Published Sep 20, 2022

Updated

An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key pair generation was found in Zyxel GS1900 series firmware versions prior to V2.70. This vulnerability could allow an unauthenticated attacker to retrieve a private key by factoring the RSA modulus N in the certificate of the web administration interface.

Affected Software

20 affected components

Zyxel GS1900-8 firmware<2.70\(aahh.3\)c0

Zyxel GS1900-8

Zyxel GS1900-8HP firmware<2.70\(aahi.3\)c0

Zyxel GS1900-8HP

Zyxel GS1900-10HP firmware<2.70\(aazi.3\)c0

Zyxel GS1900-10HP

Zyxel Gs1900-16 Firmware<2.70\(aahj.3\)c0

Zyxel Gs1900-16

Zyxel Gs1900-24 Firmware<2.70\(aahl.3\)c0

Zyxel GS1900-24

Zyxel Gs1900-24e Firmware<2.70\(aahk.3\)c0

Zyxel GS1900-24E

Zyxel Gs1900-24ep Firmware<2.70\(abto.3\)c0

Zyxel GS1900-24EP

Zyxel Gs1900-24hpv2 Firmware<2.70\(abtp.3\)c0

Zyxel Gs1900-24hpv2

Zyxel Gs1900-48 Firmware<2.70\(aahn.3\)c0

Zyxel GS1900-48

Zyxel Gs1900-48hpv2 Firmware<2.70\(abtq.3\)c0

Zyxel Gs1900-48hpv2

Remediation

Patch Available

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficient-entropy-vulnerability-of-gs1900-series-switches

Event History

Sep 20, 2022

CVE Published

via MITRE·01:50 AM

Data Sourced

via MITRE·01:50 AM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the vulnerability ID for this security issue?

The vulnerability ID for this security issue is CVE-2022-34746.

What is the severity level of the CVE-2022-34746 vulnerability?

The severity level of the CVE-2022-34746 vulnerability is medium (5.9).

Which Zyxel GS1900 series firmware versions are affected by this vulnerability?