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Vulnerability of GNOME Shell: information disclosure via Password Visible On Logout

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Password Visible On Logout of GNOME Shell, in order to obtain sensitive information.
Vulnerable systems: Debian, Ubuntu.
Severity of this threat: 1/4.
Creation date: 18/08/2020.
Références of this weakness: CVE-2020-17489, DLA-2374-1, USN-4464-1, VIGILANCE-VUL-33098.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Password Visible On Logout of GNOME Shell, in order to obtain sensitive information.
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This threat announce impacts software or systems such as Debian, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity alert is low.

The trust level is of type confirmed by the editor, with an origin of physical access.

An attacker with a expert ability can exploit this security alert.

Solutions for this threat 

Debian 9: new gnome-shell packages.
New packages are available:
  Debian 9: gnome-shell 3.22.3-3+deb9u1

Ubuntu 20.04: new gnome-shell packages.
New packages are available:
  Ubuntu 20.04 LTS: gnome-shell 3.36.4-1ubuntu1~20.04.2
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