CVE-2024-42057 Command injection in ATP series firmware

High 8.1 Published 3 Sep 2024 Updated 3 Sep 2024

Unauthenticated attackers can execute OS commands on Zyxel firewalls via crafted usernames in specific IPSec configurations.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-42057?

CVE-2024-42057 is a high-severity command injection vulnerability in Zyxel ATP series firmware, published on 3 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A command injection vulnerability in the IPSec VPN feature of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists.

Weakness: CWE-78

Which versions are affected by CVE-2024-42057?

It affects 1 product.

Products include Zyxel Zld.

How do I fix CVE-2024-42057?

No fix has been published for CVE-2024-42057 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2024-42057 being exploited?

There is no known exploitation of CVE-2024-42057 in the wild and no public exploit code.

Sources

Also known as GHSA-vf97-4vg7-22rv.