CVE-2021-3769 OS Command Injection in ohmyzsh/ohmyzsh
Attackers can execute arbitrary commands via crafted Git branch names in specific Oh My Zsh themes, requiring users to update the framework.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-3769?
CVE-2021-3769 is a high-severity command injection vulnerability in ohmyzsh/ohmyzsh, published on 30 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme.
Weakness: CWE-78
Which versions are affected by CVE-2021-3769?
It affects 1 product.
Products include Planetargon Oh My Zsh.
How do I fix CVE-2021-3769?
No fix has been published for CVE-2021-3769 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-2021-3769 being exploited?
There is no known exploitation of CVE-2021-3769 in the wild and no public exploit code.
Other vulnerabilities in ohmyzsh/ohmyzsh
Sources
Also known as GHSA-f8r6-c3hp-ccv4.