CVE-2021-41599 Improper control flow in GitHub Enterprise Server hosted Pages leads to remote code execution

High 8.8 Published 17 Feb 2022 Updated 4 Aug 2024

An attacker with permission to build GitHub Pages sites can execute arbitrary code on the server due to improper control flow.

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

What is CVE-2021-41599?

CVE-2021-41599 is a high-severity command injection vulnerability in Github Enterprise Server, published on 17 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.3 and was fixed in versions 3.0.21, 3.1.13, 3.2.5. This vulnerability was reported via the GitHub Bug Bounty program.

Weakness: CWE-77

Which versions are affected by CVE-2021-41599?

It affects 1 product.

Products include Github Enterprise Server.

How do I fix CVE-2021-41599?

No fix has been published for CVE-2021-41599 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-2021-41599 being exploited?

There is no known exploitation of CVE-2021-41599 in the wild and no public exploit code.

All Github Enterprise Server vulnerabilities

Sources

Also known as GHSA-m638-6j33-v469.