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Vulnerability of Skia: information disclosure via Timing Side-channel drawImage

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Timing Side-channel drawImage() of Skia, in order to obtain sensitive information.
Impacted systems: Debian, Fedora, Chrome, Edge Chromium, Firefox, Thunderbird, openSUSE Leap, Opera, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 19/11/2020.
Références of this alert: CERTFR-2020-AVI-766, CVE-2020-16012, DLA-2457-1, DLA-2464-1, DSA-4793-1, DSA-4796-1, FEDORA-2020-10ec8aca61, FEDORA-2020-3e005ce2e0, FEDORA-2020-b4b9280811, FEDORA-2020-f9f7305137, MFSA2020-50, MFSA2020-51, MFSA2020-52, openSUSE-SU-2020:2010-1, openSUSE-SU-2020:2012-1, openSUSE-SU-2020:2020-1, openSUSE-SU-2020:2021-1, openSUSE-SU-2020:2026-1, openSUSE-SU-2020:2031-1, openSUSE-SU-2020:2032-1, openSUSE-SU-2020:2055-1, openSUSE-SU-2020:2096-1, RHSA-2020:5231-01, RHSA-2020:5232-01, RHSA-2020:5233-01, RHSA-2020:5234-01, RHSA-2020:5236-01, RHSA-2020:5237-01, RHSA-2020:5238-01, RHSA-2020:5240-01, SUSE-SU-2020:14548-1, SUSE-SU-2020:3383-1, SUSE-SU-2020:3458-1, SUSE-SU-2020:3528-1, SUSE-SU-2020:3548-1, USN-4637-1, USN-4637-2, USN-4647-1, VIGILANCE-VUL-33923.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Timing Side-channel drawI...
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This security vulnerability impacts software or systems such as Debian, Fedora, Chrome, Edge Chromium, Firefox, Thunderbird, openSUSE Leap, Opera, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Fixes for this vulnerability are not yet public.
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