GLSA 202305-19: Firejail: Local Privilege Escalation

http://security.gentoo.org/

Severity:	normal
Title:	Firejail: Local Privilege Escalation
Date:	05/03/2023
Bugs:	#850748
ID:	202305-19

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	Architecture(s)
sys-apps/firejail-lts	<= 0.9.56.2-r1		All supported architectures
sys-apps/firejail	< 0.9.70	>= 0.9.70	All supported architectures

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

CVE-2022-31214

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202305-19.xml

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.