[ GLSA 202305-12 ] sudo: Root Privilege Escalation

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Gentoo Linux Security Advisory                           GLSA 202305-12
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                                           https://security.gentoo.org/
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 Severity: High
    Title: sudo: Root Privilege Escalation
     Date: May 03, 2023
     Bugs: #891335
       ID: 202305-12

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Synopsis
========

A vulnerability has been discovered in sudo which could result in root
privilege escalation.

Background
==========

sudo allows a system administrator to give users the ability to run
commands as other users.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-admin/sudo             < 1.9.12_p2              >= 1.9.12_p2

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

The sudoedit (aka -e) feature mishandles extra arguments passed in the
user-provided environment variables (SUDO_EDITOR, VISUAL, and EDITOR),
allowing a local attacker to append arbitrary entries to the list of
files to process.

Impact
======

The improper processing of user's environment variables could lead to
the editing of arbitrary files as root, potentially leading to root
privilege escalation.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All sudo users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.9.12_p2"

References
==========

[ 1 ] CVE-2023-22809
      https://nvd.nist.gov/vuln/detail/CVE-2023-22809

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

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

 https://security.gentoo.org/glsa/202305-12

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2023 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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