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             AUSCERT External Security Bulletin Redistribution

       GitLab Critical Security Release: 13.9.4, 13.8.6, and 13.7.9
                               18 March 2021


        AusCERT Security Bulletin Summary

Product:           GitLab Community Edition
                   GitLab Enterprise Edition
Publisher:         GitLab
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade

Original Bulletin: 

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Today we are releasing versions 13.9.4, 13.8.6, and 13.7.9 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 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.

Table of Fixes

                      Title                                 	         Severity

Remote code execution via unsafe user-controlled markdown		 critical
rendering options

An issue has been discovered in GitLab CE/EE affecting all versions starting
from 13.2 allowing unauthorised authenticated users to execute arbitrary code
on the server. This is a critical severity issue (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/
S:C/C:H/I:H/A:H, 9.9). We have requested a CVE ID and will update this blog
post when it is assigned.

Thanks @vakzz for reporting this vulnerability through our HackerOne bug bounty


We strongly recommend that all installations running an affected version above
are upgraded to the latest version as soon as possible.


To update GitLab, see the Update page. To update Gitlab Runner, see the
Updating the Runner page.

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Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
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Comment: http://www.auscert.org.au/render.html?it=1967