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Gentoo Linux Security Advisory                           GLSA 202006-01
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: GnuTLS: Information disclosure
     Date: June 09, 2020
     Bugs: #727108
       ID: 202006-01

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Synopsis
=======
An information disclosure vulnerability in GnuTLS allow remote
attackers to obtain sensitive information.

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

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls              < 3.6.14                  >= 3.6.14

Description
==========
A flaw was reported in the TLS session ticket key construction in
GnuTLS.

Impact
=====
A remote attacker could recover previous conversations in TLS 1.2 and
obtain sensitive information or conduct a man-in-the-middle attack to
bypass authentication in TLS 1.3.

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

Resolution
=========
All GnuTLS user should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-libs/gnutls-3.6.14"

References
=========
[ 1 ] CVE-2020-13777
      https://nvd.nist.gov/vuln/detail/CVE-2020-13777

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

 https://security.gentoo.org/glsa/202006-01

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/