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Gentoo Linux Security Advisory                           GLSA 202003-55
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Zsh: Privilege escalation
     Date: March 25, 2020
     Bugs: #711136
       ID: 202003-55

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Synopsis
========

A vulnerability in Zsh might allow an attacker to escalate privileges.

Background
==========

A shell designed for interactive use, although it is also a powerful
scripting language.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-shells/zsh                < 5.8                       >= 5.8

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

It was discovered that Zsh was insecure dropping privileges when
unsetting PRIVILEGED option.

Impact
======

An attacker could escalate privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Zsh users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-shells/zsh-5.8"

References
==========

[ 1 ] CVE-2019-20044
      https://nvd.nist.gov/vuln/detail/CVE-2019-20044

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

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

 https://security.gentoo.org/glsa/202003-55

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 2020 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