How severe is CVE-2021-39880?

CVE-2021-39880 has a severity score of 6.5, which is classified as medium.

How can an attacker exploit CVE-2021-39880?

An attacker can exploit CVE-2021-39880 by sending specially crafted requests to the apollo_upload_server Ruby gem, which can result in a denial of service, denying access to all users.

Is there a fix for CVE-2021-39880?

Yes, GitLab has released fixes for CVE-2021-39880. It is recommended to update to the latest version of GitLab to mitigate the vulnerability.

Vulnerability/
CVE-2021-39880

medium

6.5

5/10/2021

4/8/2024

CVE-2021-39880

Q: What is CVE-2021-39880?

CVE-2021-39880 is a Denial of Service vulnerability in the apollo_upload_server Ruby gem in GitLab CE/EE.

Q: Which versions of GitLab are affected by CVE-2021-39880?

All versions of GitLab starting from 11.9 before 14.0.9, all versions starting from 14.1 before 14.1.4, and all versions starting from 14.2 before 14.2.2 are affected.

First published: Tue Oct 05 2021(Updated: )

A Denial Of Service vulnerability in the apollo_upload_server Ruby gem in GitLab CE/EE all versions starting from 11.9 before 14.0.9, all versions starting from 14.1 before 14.1.4, and all versions starting from 14.2 before 14.2.2 allows an attacker to deny access to all users via specially crafted requests to the apollo_upload_server middleware.

Credit: cve@gitlab.com

Affected Software	Affected Version	How to fix
GitLab GitLab	>11.9.0<14.0.9
GitLab GitLab	>=11.9.0<14.0.9
GitLab GitLab	>14.1.0<14.1.4
GitLab GitLab	>=14.1.0<14.1.4
GitLab GitLab	>=14.2.0<14.2.2
GitLab GitLab	>=14.2.0<14.2.2

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Frequently Asked Questions

What is CVE-2021-39880?
CVE-2021-39880 is a Denial of Service vulnerability in the apollo_upload_server Ruby gem in GitLab CE/EE.
Which versions of GitLab are affected by CVE-2021-39880?
All versions of GitLab starting from 11.9 before 14.0.9, all versions starting from 14.1 before 14.1.4, and all versions starting from 14.2 before 14.2.2 are affected.
How severe is CVE-2021-39880?
CVE-2021-39880 has a severity score of 6.5, which is classified as medium.
How can an attacker exploit CVE-2021-39880?
An attacker can exploit CVE-2021-39880 by sending specially crafted requests to the apollo_upload_server Ruby gem, which can result in a denial of service, denying access to all users.
Is there a fix for CVE-2021-39880?
Yes, GitLab has released fixes for CVE-2021-39880. It is recommended to update to the latest version of GitLab to mitigate the vulnerability.

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