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Vulnerability of Hunspell: out-of-bounds memory reading via SuggestMgr-leftcommonsubstring

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via SuggestMgr::leftcommonsubstring() of Hunspell, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable systems: Fedora, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity of this threat: 2/4.
Creation date: 22/11/2019.
Références of this weakness: CVE-2019-16707, FEDORA-2019-074bf7d2d3, FEDORA-2019-746b0b02f7, openSUSE-SU-2020:1717-1, openSUSE-SU-2020:1719-1, RHSA-2020:3971-01, SUSE-SU-2020:2966-1, SUSE-SU-2020:2967-1, VIGILANCE-VUL-30938.

Description of the vulnerability 

An attacker can force a read at an invalid address via SuggestMgr::leftcommonsubstring() of Hunspell, in order to trigger a denial of service, or to obtain sensitive information.
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This weakness note impacts software or systems such as Fedora, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.

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

Solutions for this threat 

Fedora: new mingw-hunspell packages.
New packages are available:
  Fedora 30: mingw-hunspell 1.7.0-6.fc30
  Fedora 31: mingw-hunspell 1.7.0-6.fc31

openSUSE Leap 15: new hunspell packages.
New packages are available:
  openSUSE Leap 15.1: hunspell 1.6.2-lp151.3.3.1
  openSUSE Leap 15.2: hunspell 1.6.2-lp152.4.3.1

RHEL 7.8: new hunspell packages.
New packages are available:
  RHEL 7.0-7.8: hunspell 1.3.2-16.el7

SUSE LE 12 SP5: new hunspell packages.
New packages are available:
  SUSE LE 12 SP5: hunspell 1.3.2-19.3.1

SUSE LE 15 SP1-2: new hunspell packages.
New packages are available:
  SUSE LE 15 SP1: hunspell 1.6.2-3.3.7
  SUSE LE 15 SP2: hunspell 1.6.2-3.3.7
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