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Gentoo Linux Security Advisory                           GLSA 202107-50
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                                           https://security.gentoo.org/
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 Severity: High
    Title: Singularity: Remote code execution
     Date: July 22, 2021
     Bugs: #792465
       ID: 202107-50

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Synopsis
========

A vulnerability in Singularity could result in remote code execution.

Background
==========

Singularity is the container platform for performance sensitive
workloads.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-cluster/singularity      < 3.7.4                    >= 3.7.4 

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

Singularity always uses the default remote endpoint,
'cloud.syslabs.io', for action commands using the 'library://' URI
rather than the configured remote endpoint.

Impact
======

An attacker that that can push a malicious container to the default
remote endpoint could execute code on hosts that fetch the container.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Singularity users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-cluster/singularity-3.7.4"

References
==========

[ 1 ] CVE-2021-32635
      https://nvd.nist.gov/vuln/detail/CVE-2021-32635

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

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

 https://security.gentoo.org/glsa/202107-50

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
[email protected] 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