What is the severity of CVE-2021-39927?

The severity of CVE-2021-39927 is rated as critical due to the potential for server side request forgery attacks.

How do I fix CVE-2021-39927?

To fix CVE-2021-39927, upgrade GitLab to a version that is not affected, specifically to version 14.4.5 or later, 14.5.3 or later, or 14.6.3 or later.

Can CVE-2021-39927 be exploited remotely?

Yes, CVE-2021-39927 can be exploited remotely if the instance is misconfigured allowing attacker-sent requests to the localhost.

What impact does CVE-2021-39927 have on my GitLab instance?

CVE-2021-39927 allows attackers to send requests to the server's localhost, potentially leading to data exposure or system compromise.

Vulnerability/
CVE-2021-39927

medium

4.3

CWE

918

18/1/2022

4/8/2024

CVE-2021-39927: SSRF

First published: Tue Jan 18 2022(Updated: )

Server side request forgery protections in GitLab CE/EE versions between 8.4 and 14.4.4, between 14.5.0 and 14.5.2, and between 14.6.0 and 14.6.1 would fail to protect against attacks sending requests to localhost on port 80 or 443 if GitLab was configured to run on a port other than 80 or 443

Credit: cve@gitlab.com

Affected Software	Affected Version	How to fix
GitLab	>=8.4<=14.4.5
GitLab	>=8.4<=14.4.5
GitLab	>=14.5.0<=14.5.3
GitLab	>=14.5.0<=14.5.3
GitLab	>=14.6.0<=14.6.3
GitLab	>=14.6.0<=14.6.3

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-39927?
The severity of CVE-2021-39927 is rated as critical due to the potential for server side request forgery attacks.
How do I fix CVE-2021-39927?
To fix CVE-2021-39927, upgrade GitLab to a version that is not affected, specifically to version 14.4.5 or later, 14.5.3 or later, or 14.6.3 or later.
What versions of GitLab are affected by CVE-2021-39927?
GitLab CE/EE versions between 8.4 and 14.4.4, between 14.5.0 and 14.5.2, and between 14.6.0 and 14.6.1 are affected by CVE-2021-39927.
Can CVE-2021-39927 be exploited remotely?
Yes, CVE-2021-39927 can be exploited remotely if the instance is misconfigured allowing attacker-sent requests to the localhost.
What impact does CVE-2021-39927 have on my GitLab instance?
CVE-2021-39927 allows attackers to send requests to the server's localhost, potentially leading to data exposure or system compromise.

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version/gitlab/8.4
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