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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
[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