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Gentoo Linux Security Advisory                           GLSA 202107-11
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: OpenDoas: Insufficient environment filtering
     Date: July 07, 2021
     Bugs: #767781
       ID: 202107-11

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Synopsis
=======
A vulnerability in OpenDoas could lead to privilege escalation.

Background
=========
OpenDoas allows users to run commands as other users.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-admin/doas               < 6.8.1                    >= 6.8.1

Description
==========
OpenDoas does not properly filter the PATH variable from the resulting
shell after escalating privileges.

Impact
=====
A local attacker with control of a user's PATH variable could escalate
privileges if that user uses OpenDoas with a poisoned PATH variable.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All OpenDoas users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-admin/doas-6.8.1"

References
=========
[ 1 ] CVE-2019-25016
      https://nvd.nist.gov/vuln/detail/CVE-2019-25016

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

 https://security.gentoo.org/glsa/202107-11

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 2021 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/