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Vulnerability of GnuTLS: out-of-bounds memory reading via TLS1.3 Asynchronous Message

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via TLS1.3 Asynchronous Message of GnuTLS, in order to trigger a denial of service, or to obtain sensitive information.
Impacted products: Fedora, openSUSE Leap, Solaris, RHEL, Slackware, SLES, Ubuntu, Unix (platform) ~ not comprehensive.
Severity of this bulletin: 3/4.
Creation date: 28/03/2019.
Références of this threat: bulletinoct2020, CVE-2019-3836, FEDORA-2019-46df367eed, GNUTLS-SA-2019-03-27, openSUSE-SU-2019:1353-1, RHSA-2019:3600-01, SSA:2019-086-01, SUSE-SU-2019:1121-1, SUSE-SU-2019:1351-1, USN-3999-1, VIGILANCE-VUL-28881.

Description of the vulnerability 

An attacker can force a read at an invalid address via TLS1.3 Asynchronous Message of GnuTLS, in order to trigger a denial of service, or to obtain sensitive information.
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This vulnerability note impacts software or systems such as Fedora, openSUSE Leap, Solaris, RHEL, Slackware, SLES, Ubuntu, Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this cybersecurity vulnerability is important.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer threat note.

Solutions for this threat 

GnuTLS: version 3.6.7.
The version 3.6.7 is fixed:
  http://www.gnutls.org/download.html
  ftp://ftp.gnutls.org/gcrypt/gnutls/

Fedora 28: new gnutls packages.
New packages are available:
  Fedora 28: gnutls 3.6.5-3.fc28

openSUSE Leap 15.0: new gnutls packages.
New packages are available:
  openSUSE Leap 15.0: gnutls 3.6.7-lp150.9.1

Oracle Solaris: patch for third party software of October 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 8: new gnutls packages.
New packages are available:
  RHEL 8: gnutls 3.6.8-8.el8

Slackware: new gnutls packages.
New packages are available:
  Slackware 14.2: gnutls 3.6.7-*-1_slack14.2

SUSE LE 15: new gnutls packages.
New packages are available:
  SUSE LE 15 RTM: gnutls 3.6.7-6.11.1

Ubuntu: new libgnutls30 packages.
New packages are available:
  Ubuntu 19.04: libgnutls30 3.6.5-2ubuntu1.1
  Ubuntu 18.10: libgnutls30 3.6.4-2ubuntu1.2
  Ubuntu 18.04 LTS: libgnutls30 3.5.18-1ubuntu1.1
  Ubuntu 16.04 LTS: libgnutls30 3.4.10-4ubuntu1.5

Wind River Linux: solution (21/05/2019).
The solution is indicated in information sources.
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