CVE-2024-38270 Weak cryptography in GS1900-10HP firmware

Medium 5.3 Published 10 Sep 2024 Updated 10 Sep 2024

A LAN attacker can potentially hijack sessions due to weak entropy in authentication token generation on Zyxel GS1900 switches.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-38270?

CVE-2024-38270 is a medium-severity vulnerability in Zyxel GS1900-10HP firmware, published on 10 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.

Weakness: CWE-331

Which versions are affected by CVE-2024-38270?

It affects 10 products.

Products include Zyxel Gs1900-10hp Firmware, Zyxel Gs1900-16 Firmware, Zyxel Gs1900-24 Firmware, Zyxel Gs1900-24e Firmware, Zyxel Gs1900-24ep Firmware, Zyxel Gs1900-24hpv2 Firmware and 4 more.

How do I fix CVE-2024-38270?

No fix has been published for CVE-2024-38270 yet. Limit exposure of the affected software until one is available.

Is CVE-2024-38270 being exploited?

There is no known exploitation of CVE-2024-38270 in the wild and no public exploit code.

Sources

Also known as GHSA-38vv-qgw3-86p8.