- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 202003-55
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: Zsh: Privilege escalation
     Date: March 25, 2020
     Bugs: #711136
       ID: 202003-55

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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/