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Vulnerability of libxml2: memory leak via xmlParseBalancedChunkMemoryRecover

Synthesis of the vulnerability 

An attacker can create a memory leak via xmlParseBalancedChunkMemoryRecover() of libxml2, in order to trigger a denial of service.
Vulnerable products: Debian, Fedora, libxml, openSUSE Leap, Solaris, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 30/12/2019.
Références of this bulletin: CVE-2019-19956, DLA-2048-1, FEDORA-2020-0c71c00af4, FEDORA-2020-7694e8be73, openSUSE-SU-2020:0681-1, USN-4274-1, VIGILANCE-VUL-31236.

Description of the vulnerability 

An attacker can create a memory leak via xmlParseBalancedChunkMemoryRecover() of libxml2, in order to trigger a denial of service.
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This cybersecurity weakness impacts software or systems such as Debian, Fedora, libxml, openSUSE Leap, Solaris, Ubuntu.

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

Solutions for this threat 

libxml2: version 2.9.10.
The version 2.9.10 is fixed:
  ftp://xmlsoft.org/libxml2/

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

Debian 8: new libxml2 packages.
New packages are available:
  Debian 8: libxml2 2.9.1+dfsg1-5+deb8u8

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

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.
New packages are available:
  openSUSE Leap 15.1: libxml2 2-2.9.7-lp151.5.9.1

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

Ubuntu: new libxml2 packages.
New packages are available:
  Ubuntu 19.10: libxml2 2.9.4+dfsg1-7ubuntu3.1, libxml2-utils 2.9.4+dfsg1-7ubuntu3.1
  Ubuntu 18.04 LTS: libxml2 2.9.4+dfsg1-6.1ubuntu1.3, libxml2-utils 2.9.4+dfsg1-6.1ubuntu1.3
  Ubuntu 16.04 LTS: libxml2 2.9.3+dfsg1-1ubuntu0.7, libxml2-utils 2.9.3+dfsg1-1ubuntu0.7
  Ubuntu 14.04 ESM: libxml2 2.9.1+dfsg1-3ubuntu4.13+esm1, libxml2-utils 2.9.1+dfsg1-3ubuntu4.13+esm1
  Ubuntu 12.04 ESM: libxml2 2.7.8.dfsg-5.1ubuntu4.22, libxml2-utils 2.7.8.dfsg-5.1ubuntu4.22

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

Wind River Linux: version 10.19.45.3.
The version 10.19.45.3 is fixed:
  https://support2.windriver.com/
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