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Gentoo Linux Security Advisory                           GLSA 201709-05
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                                           https://security.gentoo.org/
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 Severity: High
    Title: chkrootkit: Local privilege escalation
     Date: September 17, 2017
     Bugs: #512356
       ID: 201709-05

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Synopsis
========

A vulnerability in chkrootkit may allow local users to gain root
privileges.

Background
==========

chkrootkit is a tool to locally check for signs of a rootkit.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-forensics/chkrootkit
                                   < 0.50                     >= 0.50 

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

When /tmp is mounted without the noexec option chkrootkit will execute
files in /tmp with root privileges.

Impact
======

A local attacker could possibly execute arbitrary code with root
privileges.

Workaround
==========

Users should mount /tmp with noexec option.

Resolution
==========

All chkrootkit users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-forensics/chkrootkit-0.50"

References
==========

[ 1 ] CVE-2014-0476
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0476

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

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

 https://security.gentoo.org/glsa/201709-05

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.

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