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Gentoo Linux Security Advisory                           GLSA 201805-09
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Shadow: security bypass
     Date: May 22, 2018
     Bugs: #647790
       ID: 201805-09

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Synopsis
========

A vulnerability found in Shadow may allow local attackers to bypass
security restrictions.

Background
==========

Shadow is a set of tools to deal with user accounts.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-apps/shadow               < 4.6                       >= 4.6 

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

A local attacker could possibly bypass security restrictions if an
administrator used "group blacklisting" to restrict access to file
system paths.

Impact
======

A local attacker could possibly bypass security restrictions.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All shadow users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.6"

References
==========

[ 1 ] CVE-2018-7169
      https://nvd.nist.gov/vuln/detail/CVE-2018-7169

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

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

 https://security.gentoo.org/glsa/201805-09

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 2018 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
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