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Gentoo Linux Security Advisory                           GLSA 201804-18
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: tenshi: Privilege escalation
     Date: April 22, 2018
     Bugs: #626654
       ID: 201804-18

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Synopsis
========

Gentoo's tenshi ebuild is vulnerable to privilege escalation due to the
way pid files are handled.

Background
==========

A log monitoring program, designed to watch one or more log files for
lines matching user defined regular expressions and report on the
matches.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-admin/tenshi              < 0.17                     >= 0.17 

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

It was discovered that the tenshi ebuild creates a tenshi.pid file
after dropping privileges to a non-root account.

Impact
======

A local attacker could escalate privileges to root or kill arbitrary
processes.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All tenshi users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-admin/tenshi-0.17"

References
==========

[ 1 ] CVE-2017-11746
      https://nvd.nist.gov/vuln/detail/CVE-2017-11746

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

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

 https://security.gentoo.org/glsa/201804-18

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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