Re: [ GLSA 202305-19 ] Firejail: Local Privilege Escalation

Sam James <[email protected]> Thu, 04 May 2023 08:10:23 +0100
Newsgroups	gmane.linux.gentoo.announce
Message-ID	<[email protected]>
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Gentoo Linux Security Advisory                           GLSA 202305-19
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Firejail: Local Privilege Escalation
     Date: May 03, 2023
     Bugs: #850748
       ID: 202305-19

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Synopsis
========

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

Background
==========

A SUID program that reduces the risk of security breaches by restricting
the running environment of untrusted applications using Linux namespaces
and seccomp-bpf.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
     sys-apps/firejail          < 0.9.70        >= 0.9.70
     sys-apps/firejail-lts      *               N/A
     
Description
===========

Firejail does not sufficiently validate the user's environment prior to
using it as the root user when using the --join command line option.

Impact
======

An unprivileged user can exploit this vulnerability to achieve local
root privileges.

Workaround
==========

System administrators can mitigate this vulnerability via adding either
"force-nonewprivs yes" or "join no" to the Firejail configuration file
in /etc/firejail/firejail.config.

Resolution
==========

Gentoo has discontinued support for sys-apps/firejail-lts. Users should
unmerge it in favor of sys-apps/firejail:

  # emerge --ask --depclean --verbose "sys-apps/firejail-lts"
  # emerge --ask --verbose "sys-apps/firejail"

All Firejail users should upgrade to the latest version:

  # emerge --ask --oneshot --verbose ">=sys-apps/firejail-0.9.70"

References
==========

[ 1 ] CVE-2022-31214
      https://nvd.nist.gov/vuln/detail/CVE-2022-31214

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

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

 https://security.gentoo.org/glsa/202305-19

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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