CVE-2021-3934 OS Command Injection in ohmyzsh/ohmyzsh

High 7.8 Published 12 Nov 2021 Updated 3 Aug 2024

Attackers can execute arbitrary OS commands via improper neutralization in the ohmyzsh Zsh configuration framework.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-3934?

CVE-2021-3934 is a high-severity command injection vulnerability in ohmyzsh/ohmyzsh, published on 12 Nov 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

ohmyzsh is vulnerable to Improper Neutralization of Special Elements used in an OS Command

Weakness: CWE-78

Which versions are affected by CVE-2021-3934?

It affects 1 product.

Products include Planetargon Oh My Zsh.

How do I fix CVE-2021-3934?

No fix has been published for CVE-2021-3934 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-2021-3934 being exploited?

There is no known exploitation of CVE-2021-3934 in the wild and no public exploit code.

Sources

Also known as GHSA-gv4m-8hpx-hfqf.