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Vulnerability of LibreOffice: directory traversal

Synthesis of the vulnerability 

An attacker can traverse directories of LibreOffice, in order to read a file outside the service root path.
Impacted products: Debian, Fedora, LibreOffice, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 12/02/2018.
Références of this threat: CVE-2018-1055-REJECT, CVE-2018-6871, DSA-4111-1, DSA-4111-2, FEDORA-2018-0a3b07a003, FEDORA-2018-3eb4d8e4c4, openSUSE-SU-2018:0446-1, RHSA-2018:0418-01, RHSA-2018:0517-01, SUSE-SU-2018:0428-1, USN-3579-1, USN-3579-2, USN-3579-3, VIGILANCE-VUL-25275.

Description of the vulnerability 

An attacker can traverse directories of LibreOffice, in order to read a file outside the service root path.
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This vulnerability announce impacts software or systems such as Debian, Fedora, LibreOffice, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity threat is medium.

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

This bulletin is about 2 vulnerabilities.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer threat bulletin.

Solutions for this threat 

LibreOffice: versions 5.4.5 and 6.0.1.
Versions 5.4.5 and 6.0.1 are fixed:
  https://www.libreoffice.org/download/download/

Debian: new libreoffice packages.
New packages are available:
  Debian 8: libreoffice 1:4.3.3-2+deb8u10
  Debian 9: libreoffice 1:5.2.7-1+deb9u2

Fedora: new libreoffice packages.
New packages are available:
  Fedora 27: libreoffice 5.4.5.1-1.fc27
  Fedora 26: libreoffice 5.3.7.2-8.fc26

openSUSE Leap: new libreoffice packages.
New packages are available:
  openSUSE Leap 42.3: libreoffice 5.4.5.1-15.1

RHEL 6.9: new libreoffice packages.
New packages are available:
  RHEL 6: libreoffice 4.3.7.2-2.el6_9.2

RHEL 7.4: new libreoffice packages.
New packages are available:
  RHEL 7: libreoffice 5.0.6.2-15.el7_4

SUSE LE 12: new libreoffice packages.
New packages are available:
  SUSE LE 12 SP2: libreoffice 5.4.5.1-40.24.1

Ubuntu: new libreoffice-core packages.
New packages are available:
  Ubuntu 17.10: libreoffice-core 1:5.4.5-0ubuntu0.17.10.5, libreoffice-common 1:5.4.5-0ubuntu0.17.10.4
  Ubuntu 16.04 LTS: libreoffice-core 1:5.1.6~rc2-0ubuntu1~xenial3
  Ubuntu 14.04 LTS: libreoffice-core 1:4.2.8-0ubuntu5.3
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