A Bash security update has been released for Gentoo Linux.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 202105-34
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: Bash: Privilege escalation
Date: May 26, 2021
Bugs: #702488
ID: 202105-34

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A vulnerability in Bash may allow users to escalate privileges.

Background
==========

Bash is the standard GNU Bourne Again SHell.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-shells/bash < 5.0_p11-r1 >= 5.0_p11-r1

Description
===========

It was discovered that Bash incorrectly dropped privileges by setting
its effective UID to its real UID.

Impact
======

A local attacker could possibly escalate privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Bash users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-5.0_p11-r1"

References
==========

[ 1 ] CVE-2019-18276
  https://nvd.nist.gov/vuln/detail/CVE-2019-18276

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

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

  https://security.gentoo.org/glsa/202105-34

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 2021 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