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Gentoo Linux Security Advisory                           GLSA 201710-16
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Shadow: Buffer overflow
     Date: October 15, 2017
     Bugs: #627044
       ID: 201710-16

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Synopsis
========

A vulnerability found in Shadow may allow remote attackers to cause a
Denial of Service condition or produce other unspecified behaviors.

Background
==========

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

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-apps/shadow               < 4.5                       >= 4.5 

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

Malformed input in the newusers tool may produce crashes and other
unspecified behaviors.

Impact
======

A remote attacker could possibly cause a Denial of Service condition or
bypass privilege boundaries in some web-hosting environments in which a
Control Panel allows an unprivileged user account to create
subaccounts.

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-4.5"

References
==========

[ 1 ] CVE-2017-12424
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-12424

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

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

 https://security.gentoo.org/glsa/201710-16

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 2017 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.

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