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Vulnerability of libxml2: memory leak via xmlSchemaValidateStream

Synthesis of the vulnerability 

An attacker can create a memory leak via xmlSchemaValidateStream() of libxml2, in order to trigger a denial of service.
Impacted products: Debian, Fedora, libxml, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this bulletin: 1/4.
Creation date: 22/01/2020.
Références of this threat: CVE-2019-20388, DLA-2369-1, FEDORA-2020-0c71c00af4, FEDORA-2020-41fe1680f6, FEDORA-2020-7694e8be73, openSUSE-SU-2020:0681-1, SUSE-SU-2020:2609-1, VIGILANCE-VUL-31395.

Description of the vulnerability 

An attacker can create a memory leak via xmlSchemaValidateStream() of libxml2, in order to trigger a denial of service.
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This vulnerability impacts software or systems such as Debian, Fedora, libxml, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

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

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 vulnerability note.

Solutions for this threat 

libxml2: patch for xmlSchemaValidateStream.
A patch is indicated in information sources.

Debian 9: new libxml2 packages.
New packages are available:
  Debian 9: libxml2 2.9.4+dfsg1-2.2+deb9u3

Fedora 30: new libxml2 packages.
New packages are available:
  Fedora 30: libxml2 2.9.10-3.fc30

Fedora 31: new libxml2 packages.
New packages are available:
  Fedora 31: libxml2 2.9.10-3.fc31

Fedora 32: new mingw-libxml2 packages.
New packages are available:
  Fedora 32: mingw-libxml2 2.9.10-1.fc32

openSUSE Leap 15.1: new libxml2 packages (25/05/2020).
New packages are available:
  openSUSE Leap 15.1: libxml2 2-2.9.7-lp151.5.9.1

SUSE LE 12 SP5: new libxml2 packages.
New packages are available:
  SUSE LE 12 SP5: libxml2 2-2.9.4-46.34.1

Wind River Linux: version 10.17.41.20.
The version 10.17.41.20 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.18.44.15.
The version 10.18.44.15 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.19.45.6.
The version 10.19.45.6 is fixed:
  https://support2.windriver.com/
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