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Vulnerability of Apache Tomcat: information disclosure via H2c Request Mix-up

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via H2c Request Mix-up of Apache Tomcat, in order to obtain sensitive information.
Impacted products: Tomcat, Debian, openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES.
Severity of this bulletin: 2/4.
Creation date: 01/03/2021.
Références of this threat: CERTFR-2021-AVI-164, CVE-2021-25122, DLA-2596-1, DSA-4891-1, openSUSE-SU-2021:0496-1, SUSE-SU-2021:0988-1, SUSE-SU-2021:0989-1, SUSE-SU-2021:1008-1, SUSE-SU-2021:1009-1, VIGILANCE-VUL-34713.

Description of the vulnerability 

An attacker can bypass access restrictions to data via H2c Request Mix-up of Apache Tomcat, in order to obtain sensitive information.
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This weakness announce impacts software or systems such as Tomcat, Debian, openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES.

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

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

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

Solutions for this threat 

Apache Tomcat: version 10.0.2.
The version 10.0.2 is fixed:
  https://tomcat.apache.org/whichversion.html

Apache Tomcat: version 9.0.43.
The version 9.0.43 is fixed:
  https://tomcat.apache.org/whichversion.html

Apache Tomcat: version 8.5.63.
The version 8.5.63 is fixed:
  https://tomcat.apache.org/whichversion.html

Debian 10: new tomcat9 packages.
New packages are available:
  Debian 10: tomcat9 9.0.31-1~deb10u4

Debian 9: new tomcat8 packages.
New packages are available:
  Debian 9: tomcat8 8.5.54-0+deb9u6

openSUSE Leap 15.2: new tomcat packages.
New packages are available:
  openSUSE Leap 15.2: tomcat 9.0.36-lp152.2.22.1

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

SUSE LE 12 SP4-5: new tomcat packages.
New packages are available:
  SUSE LE 12 SP4: tomcat 9.0.36-3.64.1
  SUSE LE 12 SP5: tomcat 9.0.36-3.64.1

SUSE LE 15 RTM: new tomcat packages.
New packages are available:
  SUSE LE 15 RTM: tomcat 9.0.36-3.79.1

SUSE LE 15 SP1: new tomcat packages.
New packages are available:
  SUSE LE 15 SP1: tomcat 9.0.36-4.58.1

SUSE LE 15 SP2-3: new tomcat packages.
New packages are available:
  SUSE LE 15 SP2: tomcat 9.0.36-3.24.1
  SUSE LE 15 SP3: tomcat 9.0.36-3.24.1
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