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Gentoo Linux Security Advisory                           GLSA 202004-06
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: GnuTLS: DTLS protocol regression
     Date: April 02, 2020
     Bugs: #715602
       ID: 202004-06

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Synopsis
========

A regression in GnuTLS breaks the security guarantees of the DTLS
protocol.

Background
==========

GnuTLS is an Open Source implementation of the TLS and SSL protocols.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls              < 3.6.13                  >= 3.6.13

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

It was discovered that DTLS client did not contribute any randomness to
the DTLS negotiation.

Impact
======

Please review the referenced advisory for details.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuTLS users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-libs/gnutls-3.6.13"

References
==========

[ 1 ] GNUTLS-SA-2020-03-31
      https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31

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

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

 https://security.gentoo.org/glsa/202004-06

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