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Gentoo Linux Security Advisory                           GLSA 202008-09
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                                           https://security.gentoo.org/
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 Severity: High
    Title: Shadow: Privilege escalation
     Date: August 25, 2020
     Bugs: #702252
       ID: 202008-09

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Synopsis
=======
Multiple Shadow utilities were installed with setuid permissions,
allowing possible root privilege escalation.

Background
=========
Shadow is a set of tools to deal with user accounts.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-apps/shadow              < 4.8-r3                  >= 4.8-r3

Description
==========
When Shadow was installed with the PAM use flag, setuid binaries
provided by Shadow were not properly restricted.

Impact
=====
A local attacker could escalate privileges to root.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Shadow users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.8-r3"

References
=========
[ 1 ] CVE-2019-19882
      https://nvd.nist.gov/vuln/detail/CVE-2019-19882
[ 2 ] Upstream mitigation
      https://github.com/shadow-maint/shadow/pull/199

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

 https://security.gentoo.org/glsa/202008-09

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 2020 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/

Gentoo: GLSA-202008-09: Shadow: Privilege escalation

Multiple Shadow utilities were installed with setuid permissions, allowing possible root privilege escalation.

Summary

When Shadow was installed with the PAM use flag, setuid binaries provided by Shadow were not properly restricted.

Resolution

All Shadow users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.8-r3"

References


[ 1 ] CVE-2019-19882 https://nvd.nist.gov/vuln/detail/CVE-2019-19882 [ 2 ] Upstream mitigation https://github.com/shadow-maint/shadow/pull/199

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202008-09

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.

Severity
Severity: High
Title: Shadow: Privilege escalation
Date: August 25, 2020
Bugs: #702252
ID: 202008-09

Synopsis

Multiple Shadow utilities were installed with setuid permissions, allowing possible root privilege escalation.

Background

Shadow is a set of tools to deal with user accounts.

Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/shadow < 4.8-r3 >= 4.8-r3

Impact

===== A local attacker could escalate privileges to root.

Workaround

There is no known workaround at this time.

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