GLSA 202105-19: Firejail: Privilege escalation

http://security.gentoo.org/

Severity:	high
Title:	Firejail: Privilege escalation
Date:	05/26/2021
Bugs:	#769542
ID:	202105-19

Synopsis

A vulnerability was discovered in Firejail which may allow local attackers to gain root privileges.

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	< 0.9.64.4	>= 0.9.64.4	All supported architectures

Description

It was discovered that a flaw in Firejail’s OverlayFS code allowed restricted programs to escape sandbox.

Impact

A local attacker could obtain arbitrary file system access via an application running within a Firejail sandbox, possibly resulting in privilege escalation.

Workaround

There is no known workaround at this time.

Resolution

All Firejail users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-apps/firejail-0.9.64.4"

References

CVE-2021-26910

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202105-19.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.