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Vulnerability of Netty: information disclosure via HttpObjectDecoder.java Double Content-Length

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via HttpObjectDecoder.java Double Content-Length of Netty, in order to obtain sensitive information.
Vulnerable products: Debian, JBoss EAP by Red Hat, Red Hat SSO, RSA Authentication Manager, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 17/02/2020.
Références of this bulletin: CERTFR-2020-AVI-179, CVE-2019-20445, DLA-2109-1, DLA-2110-1, DLA-2364-1, DLA-2365-1, DSA-2020-066, DSA-2020-067, RHSA-2020:0804-01, RHSA-2020:0805-01, RHSA-2020:0806-01, RHSA-2020:0811-01, RHSA-2020:0951-01, RHSA-2020:0952-01, USN-4532-1, VIGILANCE-VUL-31614.

Description of the vulnerability 

An attacker can bypass access restrictions to data via HttpObjectDecoder.java Double Content-Length of Netty, in order to obtain sensitive information.
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This cybersecurity threat impacts software or systems such as Debian, JBoss EAP by Red Hat, Red Hat SSO, RSA Authentication Manager, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat note 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 security threat.

Solutions for this threat 

Apache ZooKeeper: version 3.5.7.
The version 3.5.7 is fixed:
  http://zookeeper.apache.org/releases.html

Debian 8: new netty-3.9 packages.
New packages are available:
  Debian 8: netty-3.9 3.9.0.Final-1+deb8u1

Debian 8: new netty packages.
New packages are available:
  Debian 8: netty 1:3.2.6.Final-2+deb8u2

Debian 9: new netty-3.9 packages.
New packages are available:
  Debian 9: netty-3.9 3.9.9.Final-1+deb9u1

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

Red Hat JBoss EAP: version 7.2.7.
The version 7.2.7 is fixed.

Red Hat Single Sign-On: version 7.3.7.
The version 7.3.7 is fixed:
  https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.rhsso&downloadType=securityPatches&version=7.3

RSA Authentication Manager: version 8.4 P11.
The version 8.4 P11 is fixed:
  https://www.dell.com/support/

Ubuntu: new netty-3.9 packages.
New packages are available:
  Ubuntu 18.04 LTS: libnetty-3.9-java 3.9.9.Final-1+deb9u1build0.18.04.1
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