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Gentoo Linux Security Advisory GLSA 202003-32
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https://security.gentoo.org/
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Severity: Low
Title: Libgcrypt: Side-channel attack
Date: March 15, 2020
Bugs: #693108
ID: 202003-32

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Synopsis
========

A vulnerability in Libgcrypt could allow a local attacker to recover
sensitive information.

Background
==========

Libgcrypt is a general purpose cryptographic library derived out of
GnuPG.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 dev-libs/libgcrypt < 1.8.5 >= 1.8.5

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

A timing attack was found in the way ECCDSA was implemented in
Libgcrypt.

Impact
======

A local man-in-the-middle attacker, during signature generation, could
possibly recover the private key.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Libgcrypt users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-libs/libgcrypt-1.8.5”

References
==========

[ 1 ] CVE-2019-13627
https://nvd.nist.gov/vuln/detail/CVE-2019-13627

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

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

https://security.gentoo.org/glsa/202003-32

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

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