Insufficient Entropy in ZyXEL Communications Corp. products - CVE-2022-34746

Vulnerability identifier: #VU67632

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2022-34746

CWE-ID: CWE-331

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: ZyXEL Communications Corp.

Affected software:
GS1900-8
GS1900-8HP
GS1900-10HP
GS1900-16
GS1900-24
GS1900-24E
GS1900-24EP
GS1900-24HPv2
GS1900-48
GS1900-48HPv2

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to improper use of randomness sources with low entropy for RSA key pair generation. A remote attacker can retrieve a private key.

Install updates from vendor's website.

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