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Vulnerability of LibreOffice: use after free via StgSmallStrm

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via StgSmallStrm of LibreOffice, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Debian, LibreOffice, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 16/04/2018.
Références of this weakness: CVE-2018-10119, DLA-1356-1, DSA-4178-1, openSUSE-SU-2018:1311-1, RHSA-2018:3054-01, SUSE-SU-2018:1296-1, USN-3883-1, VIGILANCE-VUL-25880.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via StgSmallStrm of LibreOffice, in order to trigger a denial of service, and possibly to run code.
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This computer vulnerability impacts software or systems such as Debian, LibreOffice, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness bulletin 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 weakness.

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/

LibreOffice: patch for StgSmallStrm.
A patch is indicated in information sources.

Debian 7: new libreoffice packages.
New packages are available:
  Debian 7: libreoffice 1:3.5.4+dfsg2-0+deb7u11

Debian 8/9: new libreoffice packages.
New packages are available:
  Debian 8: libreoffice 1:4.3.3-2+deb8u11
  Debian 9: libreoffice 1:5.2.7-1+deb9u4

openSUSE Leap 42.3: new libreoffice packages.
New packages are available:
  openSUSE Leap 42.3: libreoffice 6.0.4.2-21.1

RHEL 7: new libreoffice packages.
New packages are available:
  RHEL 7: libreoffice 5.3.6.1-19.el7

SUSE LE 12 SP3: new libreoffice packages.
New packages are available:
  SUSE LE 12 SP3: libreoffice 6.0.4.2-43.33.1

Ubuntu: new libreoffice-core packages.
New packages are available:
  Ubuntu 16.04 LTS: libreoffice-core 1:5.1.6~rc2-0ubuntu1~xenial6
  Ubuntu 14.04 LTS: libreoffice-core 1:4.2.8-0ubuntu5.5
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