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[gentoo-announce] [ GLSA 202305-19 ] Firejail: Local Privilege Escalation

Posted on 03 May 2023
Gentoo-announce

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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
-------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/glsamaker/models/glsa.py", line 326, in generate_mail_table
return self._generate_mail_table()
File "/usr/local/lib/python3.9/site-packages/glsamaker/models/glsa.py", line 297, in _generate_mail_table
vuln.range_types_rev[vuln.pkg_range], vuln.version
KeyError: None


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
security@gentoo.org 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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