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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2299
           GitLab Security Release 14.0.2, 13.12.6, and 13.11.6
                                2 July 2021

===========================================================================

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

Product:           GitLab Community Edition
                   GitLab Enterprise Edition
Publisher:         GitLab
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
                   Virtualisation
Impact/Access:     Cross-site Request Forgery     -- Remote with User Interaction
                   Cross-site Scripting           -- Remote with User Interaction
                   Denial of Service              -- Existing Account            
                   Provide Misleading Information -- Remote with User Interaction
                   Access Confidential Data       -- Remote/Unauthenticated      
                   Unauthorised Access            -- Existing Account            
                   Reduced Security               -- Existing Account            
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-22223  

Original Bulletin: 
   https://about.gitlab.com/releases/2021/07/01/security-release-gitlab-14-0-2-released/

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Jul 1, 2021 - Costel Maxim  

GitLab Security Release: 14.0.2, 13.12.6, and 13.11.6

Learn more about GitLab Security Release: 14.0.2, 13.12.6, and 13.11.6 for
GitLab Community Edition (CE) and Enterprise Edition (EE).

Today we are releasing versions 14.0.2, 13.12.6, and 13.11.6 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
DoS using Webhook connections                                       high
CSRF on GraphQL API allows executing mutations through GET requests high
Private projects information disclosure                             medium
Denial of service of user profile page                              medium
Single sign-on users not getting blocked                            medium
Some users can push to Protected Branch with Deploy keys            medium
A deactivated user can access data through GraphQL                  medium
Reflected XSS in release edit page                                  medium
Clipboard DOM-based XSS                                             medium
Stored XSS on Audit Log                                             medium
Forks of public projects by project members could leak codebase     medium
Improper text rendering                                             medium
HTML Injection in full name field                                   low
Update Nokogiri                                                     low
Update Mattermost                                                   medium
Update Redis                                                        medium
Update Rdoc                                                         medium
Update libxml2                                                      medium
Update Rails gem                                                    medium

DoS using Webhook connections

A vulnerability was discovered in GitLab versions before 14.0.2, 13.12.6,
13.11.6. GitLab Webhook feature could be abused to perform denial of service
attacks. This is a high severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/
I:N/A:H, 7.7). We have requested a CVE ID and will update this blog post when
it is assigned.

Thanks afewgoats for reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

CSRF on GraphQL API allows executing mutations through GET requests

A cross-site request forgery vulnerability in the GraphQL API in GitLab since
version 13.12 and before versions 13.12.6 and 14.0.2 allowed an attacker to
call mutations as the victim. This is a high severity issue (CVSS:3.0/AV:N/AC:L
/PR:N/UI:R/S:U/C:L/I:H/A:N, 7.1). We have requested a CVE ID and will update
this blog post when it is assigned.

Thanks 0xn3va for reporting this vulnerability through our HackerOne bug bounty
program.

Remediation

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

Private projects information disclosure

An information disclosure vulnerability was found in GitLab EE versions 13.10
and later allowed a user to read project details. This is a medium severity
issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, 4.3). We have requested a
CVE ID and will update this blog post when it is assigned.

Thanks 0xn3va for reporting this vulnerability through our HackerOne bug bounty
program.

Remediation

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

Denial of service of user profile page

A denial of service in user's profile page is found starting with GitLab CE/EE
8.0 that allows attacker to reject access to their profile page via using a
specially crafted username. This is a medium severity issue (CVSS:3.0/AV:N/AC:L
/PR:L/UI:N/S:U/C:N/I:N/A:L, 4.3). We have requested a CVE ID and will update
this blog post when it is assigned.

Thanks maruthi12 for reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

Single sign-on users not getting blocked

Improper access control in GitLab EE before versions 13.11.6, 13.12.6, and
14.0.2 allowed users to be created via single sign on despite user cap being
enabled. This is a medium severity issue (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/
I:L/A:N, 4.2). We have requested a CVE ID and will update this blog post when
it is assigned.

Thanks bingomzan for reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

Some users can push to Protected Branch with Deploy keys

Under certain conditions, some users were able to push to protected branches
that were restricted to deploy keys in GitLab CE/EE since version 13.9. This is
a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N, 6.5). We
have requested a CVE ID and will update this blog post when it is assigned.

This vulnerability has been discovered internally by the GitLab team.

Remediation

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

A deactivated user can access data through GraphQL

An issue has been discovered in GitLab affecting all versions. Improper access
control allows unauthorised users to access project details using Graphql. This
is a medium severity issue (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, 6.5).
We have requested a CVE ID and will update this blog post when it is assigned.

Thanks joaxcar for reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

Reflected XSS in release edit page

A reflected cross-site scripting vulnerability in GitLab before versions
13.11.6, 13.12.6 and 14.0.2 allowed an attacker to send a malicious link to a
victim and trigger actions on their behalf if they clicked it. This is a medium
severity issue (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, 6.1). We have
requested a CVE ID and will update this blog post when it is assigned.

Thanks ashish_r_padelkar for reporting this vulnerability through our HackerOne
bug bounty program.

Remediation

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

Clipboard DOM-based XSS

Improper input sanitization in markdown in GitLab CE/EE version 13.11 and up
allowed an attacker to exploit a stored cross-site scripting vulnerability via
a specially-crafted input. This is a medium severity issue (CVSS:3.0/AV:N/AC:H/
PR:N/UI:R/S:C/C:L/I:L/A:N, 4.7). We have requested a CVE ID and will update
this blog post when it is assigned.

Thanks vovohelofor reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

Stored XSS on Audit Log

Client-Side code injection through Feature Flag name starting with GitLab CE/EE
11.9 allows a specially crafted feature flag name to PUT requests on behalf of
other users via clicking on a link. This is a medium severity issue (CVSS:3.0/
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, 6.1). It is now mitigated in the latest
release and is assigned CVE-2021-22223.

Thanks yvvdwf for reporting this vulnerability through our HackerOne bug bounty
program.

Remediation

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

Forks of public projects by project members could leak codebase

An issue has been discovered in GitLab CE/EE affecting all versions starting
with 12.8. Under a special condition it was possible to access data of an
internal repository through project fork done by a project member. This is a
medium severity issue (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N, 5.9). We
have requested a CVE ID and will update this blog post when it is assigned.

This vulnerability has been discovered internally by the GitLab team.

Remediation

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

Improper text rendering

Improper text rendering while rendering merge requests could be exploited to
submit malicious code. This vulnerability affects GitLab CE/EE 9.3 and later
through 13.11.6, 13.12.6, and 14.0.2. This is a medium severity issue (CVSS:3.0
/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N, 4.9). We have requested a CVE ID and will
update this blog post when it is assigned.

This vulnerability has been discovered internally by the GitLab team.

Remediation

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

HTML Injection in full name field

HTML injection was possible via the full name field before versions 13.11.6,
13.12.6, and 14.0.2 in GitLab CE. This is a high severity issue (CVSS:3.0/AV:N/
AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N, 3.5). We have requested a CVE ID and will
update this blog post when it is assigned.

Thanks andor404 for reporting this vulnerability through our HackerOne bug
bounty program.

Remediation

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

Update Nokogiri

Nokogiri has been upgraded to 1.11.4 in order to mitigate security concerns.

Versions affected

Affects all versions.

Remediation

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

Update Mattermost

Mattermost has been upgraded to 5.33.5 in order to mitigate security concerns.

Versions affected

Affects versions 13.10 and later.

Remediation

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

Update Redis

Redis has been upgraded to 6.0.14 in order to mitigate security concerns.

Versions affected

Affects versions 13.9 and later.

Remediation

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

Update Rdoc

Rdoc has been upgraded to 6.3.1 in order to mitigate security concerns.

Versions affected

Affects all versions.

Remediation

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

Update libxml2

libxml2 has been upgraded to 2.9.11 in order to mitigate security concerns.

Versions affected

Affects all versions.

Remediation

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

Update Rails gem

The Rails gem has been upgraded to 6.0.3.7 in order to mitigate security
concerns.

Versions affected

Affects all versions.

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

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