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Vulnerability of Netty: overload via ZlibDecoders

Synthesis of the vulnerability 

An attacker can trigger an overload via ZlibDecoders of Netty, in order to trigger a denial of service.
Vulnerable systems: Kafka, Debian, Red Hat SSO, RSA Authentication Manager.
Severity of this threat: 2/4.
Creation date: 04/05/2020.
Références of this weakness: CVE-2020-11612, DLA-2364-1, DSA-2020-135, RHSA-2020:3495-01, RHSA-2020:3496-01, RHSA-2020:3497-01, RHSA-2020:3501-01, VIGILANCE-VUL-32168.

Description of the vulnerability 

An attacker can trigger an overload via ZlibDecoders of Netty, in order to trigger a denial of service.
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This vulnerability bulletin impacts software or systems such as Kafka, Debian, Red Hat SSO, RSA Authentication Manager.

Our Vigil@nce team determined that the severity of this security note is medium.

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

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

Apache Kafka: version 2.5.1.
The version 2.5.1 is fixed:
  https://kafka.apache.org/downloads#2.5.1

Apache Kafka: version 2.6.0.
The version 2.6.0 is fixed:
  http://kafka.apache.org/downloads

Apache ZooKeeper: version 3.5.8.
The version 3.5.8 is fixed:
  https://www.apache.org/dyn/closer.lua/zookeeper/zookeeper-3.5.8/apache-zookeeper-3.5.8.tar.gz

Apache ZooKeeper: version 3.6.1.
The version 3.6.1 is fixed:
  https://zookeeper.apache.org/releases.html

Debian 9: new netty packages.
New packages are available:
  Debian 9: netty 1:4.1.7-2+deb9u2

Red Hat Single Sign-On: version 7.4.2.
The version 7.4.2 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.rhsso&downloadType=securityPatches&version=7.4

RSA Authentication Manager: version 8.4 Patch 13.
The version 8.4 Patch 13 is fixed.
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