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Vulnerability of WebKitGTK: use after free via AudioSourceProviderGStreamer

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via AudioSourceProviderGStreamer of WebKitGTK, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Debian, Fedora, openSUSE Leap, Solaris, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 17/02/2021.
Références of this alert: CVE-2020-13558, DSA-4854-1, FEDORA-2021-ab674d56bc, FEDORA-2021-e03b328043, openSUSE-SU-2021:0376-1, SUSE-SU-2021:0536-1, SUSE-SU-2021:0583-1, USN-4739-1, VIGILANCE-VUL-34601.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via AudioSourceProviderGStreamer of WebKitGTK, in order to trigger a denial of service, and possibly to run code.
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This vulnerability note impacts software or systems such as Debian, Fedora, openSUSE Leap, Solaris, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity vulnerability 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 threat note.

Solutions for this threat 

Debian 10: new webkit2gtk packages.
New packages are available:
  Debian 10: webkit2gtk 2.30.5-1~deb10u1

Fedora 32: new webkit2gtk3 packages.
New packages are available:
  Fedora 32: webkit2gtk3 2.30.5-1.fc32

Fedora 33: new webkit2gtk3 packages.
New packages are available:
  Fedora 33: webkit2gtk3 2.30.5-1.fc33

openSUSE Leap 15.2: new webkit2gtk3 packages.
New packages are available:
  openSUSE Leap 15.2: webkit2gtk3 2.30.5-lp152.2.10.5

Oracle Solaris: patch for third party software of April 2021 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 15 RTM-SP1: new webkit2gtk3 packages.
New packages are available:
  SUSE LE 15 RTM: webkit2gtk3 2.30.5-3.66.1
  SUSE LE 15 SP1: webkit2gtk3 2.30.5-3.66.1

SUSE LE 15 SP2: new webkit2gtk3 packages.
New packages are available:
  SUSE LE 15 SP2: webkit2gtk3 2.30.5-3.12.1

Ubuntu: new webkit2gtk packages.
New packages are available:
  Ubuntu 20.10: libjavascriptcoregtk-4.0-18 2.30.5-0ubuntu0.20.10.1, libwebkit2gtk-4.0-37 2.30.5-0ubuntu0.20.10.1
  Ubuntu 20.04 LTS: libjavascriptcoregtk-4.0-18 2.30.5-0ubuntu0.20.04.1, libwebkit2gtk-4.0-37 2.30.5-0ubuntu0.20.04.1
  Ubuntu 18.04 LTS: libjavascriptcoregtk-4.0-18 2.30.5-0ubuntu0.18.04.1, libwebkit2gtk-4.0-37 2.30.5-0ubuntu0.18.04.1
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