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From: Thomas Deutschmann
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <4a9e844e-8fa0-534d-e4cf-a6048f726da6@gentoo.org>
Subject: [ GLSA 202105-34 ] Bash: Privilege escalation
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Gentoo Linux Security Advisory GLSA 202105-34
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https://security.gentoo.org/
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Severity: Normal
Title: Bash: Privilege escalation
Date: May 26, 2021
Bugs: #702488
ID: 202105-34
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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
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