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Fencer Vulns
medium 4.8

CVE-2019-3820 json

It was discovered that the gnome-shell lock screen since version 3.15.91 did not properly restrict all contextual actions.

published 2019-02-06 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13443

cvss
4.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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.

Patch / fix

  • gnome gnome-shell 3.30.3, 3.31.5
  • gnome-shell Debian 14, Debian 13, Debian 12 3.30.2-3

debian advisories DEBIAN-CVE-2019-3820

  • gnome-shell Ubuntu 18.04 LTS 3.28.3+git20190124-0ubuntu18.04.2
  • gnome-shell Ubuntu Pro 16.04 LTS 3.18.5-0ubuntu0.3+esm1

ubuntu advisories UBUNTU-CVE-2019-3820

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gdm RHEL 7 1:3.28.2-22.el7
  • gtk3 RHEL 7 3.22.30-5.el7
  • xchat RHEL 7 1:2.8.8-25.el7
  • colord RHEL 7 1.3.4-2.el7
  • LibRaw RHEL 7 0.19.4-1.el7
  • mutter RHEL 7 3.28.3-20.el7
  • tracker RHEL 7 1.10.5-8.el7
  • nautilus RHEL 7 3.26.3.1-7.el7

red hat advisories RHSA-2020:1021RHSA-2019:3553

  • gnome-shell SLE Workstation Extension 15 SP1, SLE Workstation Extension 15, SLE Module for Desktop Applications 15 SP1 +1 more 3.26.2+20180130.0d9c74212-4.19.2
  • gnome-shell SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +7 more 3.20.4-77.23.1

suse advisories SUSE-SU-2019:1459-1SUSE-SU-2019:1390-1

  • gnome-shell openSUSE Tumbleweed 40.5-1.1
  • gnome-shell openSUSE Leap 15.1, openSUSE Leap 15.0 3.26.2+20180130.0d9c74212-lp151.7.3.1

opensuse advisories openSUSE-SU-2024:10797-1openSUSE-SU-2019:1582-1

  • pidgin AlmaLinux 8 2.13.0-5.el8
  • libpurple AlmaLinux 8 2.13.0-5.el8
  • gdk-pixbuf2 AlmaLinux 8 2.36.12-5.el8
  • gnome-desktop3 AlmaLinux 8 3.32.2-1.el8
  • gdk-pixbuf2-xlib AlmaLinux 8 2.36.12-5.el8
  • gdk-pixbuf2-modules AlmaLinux 8 2.36.12-5.el8

almalinux advisories ALSA-2019:3553

  • pango Rocky Linux 8 1.42.4-6.el8
  • pidgin Rocky Linux 8 2.13.0-5.el8
  • gdk-pixbuf2 Rocky Linux 8 2.36.12-5.el8
  • gnome-desktop3 Rocky Linux 8 3.32.2-1.el8

rocky linux advisories RLSA-2019:3553

  • gdm Arch Linux 3.30.3-1

arch linux advisories AVG-879

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3820 updated cvss 4.8

gnome-shell: partial lock screen bypass

  • Red Hat Ansible Tower 3.5 for RHEL 7 Server ansible-tower-35/ansible-tower 3.5.6-1
    fixed: vendor fix RHBA-2020:1539
  • Red Hat Ansible Tower 3.6 for RHEL 7 ansible-tower-36/ansible-tower 3.6.4-1
    fixed: vendor fix RHBA-2020:1540
  • Red Hat CodeReady Linux Builder (v. 8) gjs 1.56.2-3.el8, gvfs 1.36.2-6.el8, pidgin 2.13.0-5.el8, mozjs60 60.9.0-3.el8, mutter 3.32.2-10.el8, gvfs-afc 1.36.2-6.el8, +16 more Red Hat Enterprise Linux AppStream (v. 8) gjs 1.56.2-3.el8, gdm 3.28.3-22.el8, gvfs 1.36.2-6.el8, SDL 1.2.15-35.el8, gtk3 3.22.30-4.el8, pango 1.42.4-6.el8, +84 more Red Hat Enterprise Linux BaseOS (v. 8) mozjs60 60.9.0-3.el8, gdk-pixbuf2 2.36.12-5.el8, gdk-pixbuf2-xlib 2.36.12-5.el8, gdk-pixbuf2-modules 2.36.12-5.el8, gsettings-desktop-schemas 3.32.0-3.el8
    fixed: vendor fix RHSA-2019:3553
  • Red Hat Enterprise Linux Client (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, xchat 2.8.8-25.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, +52 more Red Hat Enterprise Linux Client Optional (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, xchat 2.8.8-25.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, +46 more Red Hat Enterprise Linux ComputeNode (v. 7) colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, libcanberra 0.30-9.el7, colord-libs 1.3.4-2.el7, gtk3-tests 3.22.30-5.el7, shared-mime-info 1.8-5.el7, +7 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, mutter 3.28.3-20.el7, libcanberra 0.30-9.el7, colord-libs 1.3.4-2.el7, +16 more Red Hat Enterprise Linux Server (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, tracker 1.10.5-8.el7, +50 more Red Hat Enterprise Linux Server Optional (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, xchat 2.8.8-25.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, +43 more
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, xchat 2.8.8-25.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, +52 more Red Hat Enterprise Linux Workstation Optional (v. 7) gdm 3.28.2-22.el7, colord 1.3.4-2.el7, gtk3 3.22.30-5.el7, xchat 2.8.8-25.el7, LibRaw 0.19.4-1.el7, mutter 3.28.3-20.el7, +40 more
    fixed: vendor fix RHSA-2020:1021

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3820 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 4.8 CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
NVD 3.1 4.3 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • The Gnome Project gnome-shell

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.