[ GLSA 202006-01 ] GnuTLS: Information disclosure

Thomas Deutschmann <[email protected]> Tue, 9 Jun 2020 16:50:23 +0200
Newsgroups	gmane.linux.gentoo.announce
Organization	Gentoo Foundation, Inc
Message-ID	<[email protected]>
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 202006-01
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: GnuTLS: Information disclosure
     Date: June 09, 2020
     Bugs: #727108
       ID: 202006-01

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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
[email protected] 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
signature.asc (application/pgp-signature, 618 B)