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Vulnerability of GNU gettext: use after free via default_add_message

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via default_add_message() of GNU gettext, in order to trigger a denial of service, and possibly to run code.
Impacted products: Fedora, openSUSE Leap, Solaris, RHEL, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 12/11/2018.
Références of this threat: CVE-2018-18751, FEDORA-2018-a5d1fa335e, FEDORA-2018-d6211abfb0, openSUSE-SU-2020:1270-1, openSUSE-SU-2020:1278-1, openSUSE-SU-2020:1385-1, RHSA-2019:3643-01, RHSA-2020:1138-01, RHSA-2020:2485-01, RHSA-2020:2846-01, SUSE-SU-2020:2296-1, USN-3815-1, USN-3815-2, VIGILANCE-VUL-27753.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via default_add_message() of GNU gettext, in order to trigger a denial of service, and possibly to run code.
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This computer weakness note impacts software or systems such as Fedora, openSUSE Leap, Solaris, RHEL, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security 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 announce.

Solutions for this threat 

Fedora 28: new gettext packages.
New packages are available:
  Fedora 28: gettext 0.19.8.1-18.fc28

Fedora 29: new gettext packages.
New packages are available:
  Fedora 29: gettext 0.19.8.1-18.fc29

openSUSE Leap 15: new gettext-runtime packages.
New packages are available:
  openSUSE Leap 15.1: gettext-runtime 0.19.8.1-lp151.5.3.1
  openSUSE Leap 15.2: gettext-runtime 0.19.8.1-lp152.6.3.1

Oracle Solaris: patch for third party software of April 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7.6: new gettext packages.
New packages are available:
  RHEL 7.6: gettext 0.19.8.1-3.el7_6

RHEL 7.7: new gettext packages.
New packages are available:
  RHEL 7.7: gettext 0.19.8.1-3.el7_7

RHEL 7: new gettext packages.
New packages are available:
  RHEL 7.0-7.7: gettext 0.19.8.1-3.el7

RHEL 8: new gettext packages.
New packages are available:
  RHEL 8: gettext 0.19.8.1-17.el8

SUSE LE 15 SP1-2: new gettext-runtime packages.
New packages are available:
  SUSE LE 15 SP1: gettext-runtime 0.19.8.1-4.8.1
  SUSE LE 15 SP2: gettext-runtime 0.19.8.1-4.8.1

SUSE LE 15 SP1: new gettext-csharp packages.
New packages are available:
  SUSE LE 15 SP1: gettext-csharp 0.19.8.1-bp151.2.1

Ubuntu: new gettext packages.
New packages are available:
  Ubuntu 18.10: gettext 0.19.8.1-8ubuntu0.1
  Ubuntu 18.04 LTS: gettext 0.19.8.1-6ubuntu0.1
  Ubuntu 16.04 LTS: gettext 0.19.7-2ubuntu3.1
  Ubuntu 14.04 LTS: gettext 0.18.3.1-1ubuntu3.1
  Ubuntu 12.04 ESM: gettext 0.18.1.1-5ubuntu3.1

Wind River Linux: solution (28/11/2018).
The solution is indicated in information sources.
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