CVE-2019-3820

Description

It was discovered that the gnome-shell lock screen since version 3.15.91 did not properly restrict all contextual actions. An attacker with physical access to a locked workstation could invoke certain keyboard shortcuts, and potentially other actions.

CVSS Metrics

• v3.1•MEDIUM•Score: 4.3CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
• v3.0•MEDIUM•Score: 4.8CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
• v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.04%• Percentile: 14%

Techniques & Countermeasures

• CWE-287•Improper Authentication

  When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

• CWE-285•Improper Authorization

  The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Affected Systems

• canonical•ubuntu_linux

  18.04 | 18.10

• gnome•gnome-shell

  ≥ 3.15.91, < 3.30.3 | ≥ 3.31.0, < 3.31.5

• opensuse•leap

  15.0 | 15.1 | 42.3

• the gnome project•gnome-shell

  since 3.15.91

References (5)

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3820
• https://gitlab.gnome.org/GNOME/gnome-shell/issues/851
• https://usn.ubuntu.com/3966-1/
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00049.html