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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0885
              GitLab 12.8.6 patches unconfirmed sign-up flow
                               12 March 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           GitLab Community Edition
                   GitLab Enterprise Edition
Publisher:         GitLab
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
                   Virtualisation
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade

Original Bulletin: 
   https://about.gitlab.com/releases/2020/03/11/critical-security-release-gitlab-12-dot-8-dot-6-released/

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Mar 11, 2020 - Ethan Strike  

GitLab Critical Security Release: 12.8.6

Today we are releasing version 12.8.6 for GitLab Community Edition (CE) and
Enterprise Edition (EE).

This version contains an important security fix, and we strongly recommend that
all GitLab installations be upgraded to one of these versions immediately.

The vulnerability details will be made public on our issue tracker in
approximately 30 days.

Please read on for more information regarding this release.

Email Confirmation not Required on Sign-up

With the release of 12.8.0, a soft email confirmation sign-up flow was enabled
by default. For instances with sign-up enabled, users were able to sign up and
access the instance for a 2 day grace period with an unconfirmed email address,
potentially bypassing domain restrictions. The change was reverted and is
awaiting a CVE.

Versions Affected

Affects GitLab CE/EE 12.8.0 through 12.8.5.

Remediation

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

Updating

To update GitLab, see the Update page.

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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