Arch Linux Security Advisory ASA-202108-7
========================================
Severity: High
Date    : 2021-08-10
CVE-ID  : CVE-2021-22236 CVE-2021-22237 CVE-2021-22239 CVE-2021-22241
Package : gitlab
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-2251

Summary
======
The package gitlab before version 14.1.2-1 is vulnerable to multiple
issues including cross-site scripting, access restriction bypass and
incorrect calculation.

Resolution
=========
Upgrade to 14.1.2-1.

# pacman -Syu "gitlab>=14.1.2-1"

The problems have been fixed upstream in version 14.1.2.

Workaround
=========
None.

Description
==========
- CVE-2021-22236 (incorrect calculation)

Due to improper handling of OAuth client IDs, new subscriptions
generated OAuth tokens on an incorrect OAuth client application. This
vulnerability is present in GitLab CE/EE since version 14.1 before
version 14.1.2.

- CVE-2021-22237 (access restriction bypass)

Under specialized conditions, GitLab may allow a user with an
impersonation token to perform Git actions even if impersonation is
disabled. This vulnerability is present in GitLab versions before
14.1.2.

- CVE-2021-22239 (access restriction bypass)

An unauthorized user was able to insert metadata when creating a new
issue on GitLab 14.0 and later before version 14.1.2.

- CVE-2021-22241 (cross-site scripting)

An issue has been discovered in GitLab affecting all versions starting
from 13.4 and before 14.1.2. It was possible to exploit a stored cross-site-scripting via a specifically crafted default branch name.

Impact
=====
A remote attacker could execute arbitrary JavaScript code through a
crafted branch name, or bypass access restrictions to perform various
actions they are not authorised for.

References
=========
https://about.gitlab.com/releases/2021/08/03/security-release-gitlab-14-1-2-released/
https://about.gitlab.com/releases/2021/08/03/security-release-gitlab-14-1-2-released/#new-subscriptions-generate-oauth-tokens-on-an-incorrect-oauth-client-application
https://about.gitlab.com/releases/2021/08/03/security-release-gitlab-14-1-2-released/#perform-git-actions-with-an-impersonation-token-even-if-impersonation-is-disabled
https://about.gitlab.com/releases/2021/08/03/security-release-gitlab-14-1-2-released/#unauthorised-user-was-able-to-add-meta-data-upon-issue-creation
https://about.gitlab.com/releases/2021/08/03/security-release-gitlab-14-1-2-released/#stored-xss-in-default-branch-name
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22241.json
https://gitlab.com/gitlab-org/gitlab/-/issues/336460
https://hackerone.com/reports/1256777
https://security.archlinux.org/CVE-2021-22236
https://security.archlinux.org/CVE-2021-22237
https://security.archlinux.org/CVE-2021-22239
https://security.archlinux.org/CVE-2021-22241