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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
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