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Vulnerability of Ruby: information disclosure via File.fnmatch NUL Character Injection

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via File.fnmatch NUL Character Injection of Ruby, in order to obtain sensitive information.
Vulnerable software: Debian, Solaris, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 26/11/2019.
Références of this computer vulnerability: CVE-2019-15845, DLA-2007-1, DSA-4586-1, DSA-4587-1, SUSE-SU-2020:0737-1, USN-4201-1, VIGILANCE-VUL-30967.

Description of the vulnerability 

An attacker can bypass access restrictions to data via File.fnmatch NUL Character Injection of Ruby, in order to obtain sensitive information.
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This computer vulnerability alert impacts software or systems such as Debian, Solaris, SLES, Ubuntu.

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

Solutions for this threat 

Debian 10: new ruby2.5 packages.
New packages are available:
  Debian 10: ruby2.5 2.5.5-3+deb10u1

Debian 8: new ruby2.1 packages.
New packages are available:
  Debian 8: ruby2.1 2.1.5-2+deb8u8

Debian 9: new ruby2.3 packages.
New packages are available:
  Debian 9: ruby2.3 2.3.3-1+deb9u7

Oracle Solaris: patch for third party software of Januray 2020 v3.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 15: new ruby2.5 packages.
New packages are available:
  SUSE LE 15 RTM: ruby2.5 2.5.7-4.8.1
  SUSE LE 15 SP1: ruby2.5 2.5.7-4.8.1

Ubuntu: new ruby packages.
New packages are available:
  Ubuntu 19.10: libruby2.5 2.5.5-4ubuntu2.1, ruby2.5 2.5.5-4ubuntu2.1
  Ubuntu 19.04: libruby2.5 2.5.5-1ubuntu1.1, ruby2.5 2.5.5-1ubuntu1.1
  Ubuntu 18.04 LTS: libruby2.5 2.5.1-1ubuntu1.6, ruby2.5 2.5.1-1ubuntu1.6
  Ubuntu 16.04 LTS: libruby2.3 2.3.1-2~ubuntu16.04.14, ruby2.3 2.3.1-2~ubuntu16.04.14

Wind River Linux: version 10.18.44.14.
The version 10.18.44.14 is fixed:
  https://support2.windriver.com/
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