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Vulnerability of Apache Tomcat: information disclosure via HTTP/2 Concurrent Streams Request Mix-up

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via HTTP/2 Concurrent Streams Request Mix-up of Apache Tomcat, in order to obtain sensitive information.
Impacted software: Tomcat, Debian, Avamar, NetWorker, openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES.
Severity of this computer vulnerability: 2/4.
Creation date: 12/10/2020.
Références of this announce: CVE-2020-13943, DLA-2407-1, DSA-2021-001, openSUSE-SU-2020:1799-1, openSUSE-SU-2020:1842-1, SUSE-SU-2020:2996-1, SUSE-SU-2020:3068-1, SUSE-SU-2020:3069-1, VIGILANCE-VUL-33544.

Description of the vulnerability 

An attacker can bypass access restrictions to data via HTTP/2 Concurrent Streams Request Mix-up of Apache Tomcat, in order to obtain sensitive information.
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This weakness impacts software or systems such as Tomcat, Debian, Avamar, NetWorker, openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this vulnerability announce is medium.

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 threat bulletin.

Solutions for this threat 

Apache Tomcat: version 9.0.38.
The version 9.0.38 is fixed:
  http://tomcat.apache.org/whichversion.html

Apache Tomcat: version 8.5.58.
The version 8.5.58 is fixed:
  http://tomcat.apache.org/whichversion.html

Debian 9: new tomcat8 packages.
New packages are available:
  Debian 9: tomcat8 8.5.54-0+deb9u4

Dell EMC Avamar/NetWorker: solution for Multiple Components.
The solution is indicated in information sources.

openSUSE Leap 15.1: new tomcat packages.
New packages are available:
  openSUSE Leap 15.1: tomcat 9.0.36-lp151.3.33.1

openSUSE Leap 15.2: new tomcat packages.
New packages are available:
  openSUSE Leap 15.2: tomcat 9.0.36-lp152.2.10.1

Oracle Solaris: patch for third party software of January 2021 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 12 SP5: new tomcat packages.
New packages are available:
  SUSE LE 12 SP5: tomcat 9.0.36-3.50.1

SUSE LE 15 SP1-2: new tomcat packages.
New packages are available:
  SUSE LE 15 SP1: tomcat 9.0.36-4.47.3
  SUSE LE 15 SP2: tomcat 9.0.36-3.12.3
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