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Gentoo Linux Security Advisory                           GLSA 202105-37
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: Nextcloud Desktop Client: User-assisted execution of
            arbitrary code
      Date: May 26, 2021
      Bugs: #783531
        ID: 202105-37

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Synopsis
========

A vulnerability in Nextcloud Desktop Client could allow a remote
attacker to execute arbitrary commands.

Background
==========

The Nextcloud Desktop Client is a tool to synchronize files from
Nextcloud Server with your computer.

Affected packages
=================

     -------------------------------------------------------------------
      Package              /     Vulnerable     /            Unaffected
     -------------------------------------------------------------------
   1  net-misc/nextcloud-client
                                   < 3.1.3                    >= 3.1.3

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

It was discovered that Nextcloud Desktop Client did not validate URLs.

Impact
======

A remote attacker could entice a user to connect to a malicious
Nextcloud server to cause the execution of arbitrary commands with the
privileges of the user running the Nextcloud Desktop Client
application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Nextcloud Desktop Client users should upgrade to the latest
version:

   # emerge --sync
   # emerge --ask --oneshot -v ">=net-misc/nextcloud-client-3.1.3"

References
==========

[ 1 ] CVE-2021-22879
       https://nvd.nist.gov/vuln/detail/CVE-2021-22879

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/202105-37

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2021 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5