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AUSCERT External Security Bulletin Redistribution
ESB-2023.2521
GitLab Critical Security Release: 15.11.2, 15.10.6, and 15.9.7
8 May 2023
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AusCERT Security Bulletin Summary
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Product: GitLab Community Edition
GitLab Enterprise Edition
Publisher: GitLab
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2023-2478
Original Bulletin:
https://about.gitlab.com/releases/2023/05/05/critical-security-release-gitlab-15-11-2-released/
Comment: CVSS (Max): 9.6 CVE-2023-2478 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N)
CVSS Source: GitLab
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
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May 5, 2023 - Rohit Shambhuni
GitLab Critical Security Release: 15.11.2, 15.10.6, and 15.9.7
Learn more about GitLab Critical Security Release: 15.11.2, 15.10.6, and 15.9.7
for GitLab Community Edition (CE) and Enterprise Edition (EE).
Today we are releasing versions 15.11.2, 15.10.6, and 15.9.7 for GitLab
Community Edition (CE) and Enterprise Edition (EE).
These versions contain important security fixes, and we strongly recommend that
all GitLab installations be upgraded to one of these versions immediately.
GitLab.com is already running the patched version.
GitLab releases patches for vulnerabilities in dedicated security releases.
There are two types of security releases: a monthly, scheduled security
release, released a week after the feature release (which deploys on the 22nd
of each month), and ad-hoc security releases for critical vulnerabilities. For
more information, you can visit our security FAQ. You can see all of our
regular and security release blog posts here. In addition, the issues detailing
each vulnerability are made public on our issue tracker 30 days after the
release in which they were patched.
We are dedicated to ensuring all aspects of GitLab that are exposed to
customers or that host customer data are held to the highest security
standards. As part of maintaining good security hygiene, it is highly
recommended that all customers upgrade to the latest security release for their
supported version. You can read more best practices in securing your GitLab
instance in our blog post.
Recommended Action
We strongly recommend that all installations running a version affected by the
issues described below are upgraded to the latest version as soon as possible.
When no specific deployment type (omnibus, source code, helm chart, etc.) of a
product is mentioned, this means all types are affected.
Table of Fixes
Title Severity
Malicious Runner Attachment via GraphQL critical
Malicious Runner Attachment via GraphQL
An issue has been discovered in GitLab CE/EE affecting all versions starting
from 15.4 before 15.9.7, all versions starting from 15.10 before 15.10.6, all
versions starting from 15.11 before 15.11.2. Under certain conditions, any
GitLab user account on the instance may use a GraphQL endpoint to attach a
malicious runner to any project on the instance. This is a critical severity
issue (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N, 9.6). It is now mitigated
in the latest release and is assigned CVE-2023-2478.
Thanks yvvdwf for reporting this vulnerability through our HackerOne bug bounty
program.
Non Security Patches
This security release also includes the following non-security patches.
15.10.6
o Backport IP enforcement FF to 15.10
o Bundle libarchive in the package
Updating
To update GitLab, see the Update page. To update Gitlab Runner, see the
Updating the Runner page.
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The University of Queensland
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