[ASA-201807-1] gitlab: multiple issues

[Jelle van der Waa]

Arch Linux Security Advisory ASA-201807-1
=========================================

Severity: Medium
Date    : 2018-07-04
CVE-ID  : CVE-2018-3740 CVE-2018-12606 CVE-2018-12607
Package : gitlab
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-726

Summary
=======

The package gitlab before version 11.0.1-1 is vulnerable to multiple
issues including cross-site scripting and insufficient validation.

Resolution
==========

Upgrade to 11.0.1-1.

# pacman -Syu "gitlab>=11.0.1-1"

The problems have been fixed upstream in version 11.0.1.

Workaround
==========

None.

Description
===========

- CVE-2018-3740 (insufficient validation)

A specially crafted HTML fragment can cause Sanitize gem for Ruby to
allow non-whitelisted attributes to be used on a whitelisted HTML
element.

- CVE-2018-12606 (cross-site scripting)

The wiki contains a persistent XSS issue due to a lack of output
encoding affecting a specific markdown feature.

- CVE-2018-12607 (cross-site scripting)

The charts feature contained a persistent XSS issue due to a lack of
output encoding.

Impact
======

An attacker is able to use a GitLab server to execute malicious
Javascript code on its users via a crafted HTML chart or specific
markdown features.

References
==========

https://about.gitlab.com/2018/06/25/security-release-gitlab-11-dot-0-dot-1-released/
https://security.archlinux.org/CVE-2018-3740
https://security.archlinux.org/CVE-2018-12606
https://security.archlinux.org/CVE-2018-12607
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