gdm: lock screen bypass when timed login is enabled
Published Feb 6, 2019
6.4
MEDIUMCVSS 3.0
EPSS 0.50%
Description
A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to expire, at which time they would gain access to the logged-in user's session.
Affected products
-
- Version 3.31.4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| The Gnome Projectr | Gdm | n/a |
|
Configuration 1
- < 3.31.4
Configuration 2
- 18.04
- 18.10
Configuration 3
- 7.0
No data.
Red Hat Enterprise Linux 8
LibRaw-0:0.19.5-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
LibRaw-0:0.19.5-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
accountsservice-0:0.6.50-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
accountsservice-0:0.6.50-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
appstream-data-0:8-20191129.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
appstream-data-0:8-20191129.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
baobab-0:3.28.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
baobab-0:3.28.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
clutter-0:1.26.2-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
clutter-0:1.26.2-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
evince-0:3.28.4-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
evince-0:3.28.4-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gdm-1:3.28.3-29.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gdm-1:3.28.3-29.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gjs-0:1.56.2-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gjs-0:1.56.2-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-boxes-0:3.28.5-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-boxes-0:3.28.5-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-control-center-0:3.28.2-19.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-control-center-0:3.28.2-19.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-menus-0:3.13.3-11.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-menus-0:3.13.3-11.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-online-accounts-0:3.28.2-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-online-accounts-0:3.28.2-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-remote-desktop-0:0.1.6-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-remote-desktop-0:0.1.6-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-session-0:3.28.1-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-session-0:3.28.1-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-settings-daemon-0:3.32.0-9.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-settings-daemon-0:3.32.0-9.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-shell-0:3.32.2-14.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-shell-0:3.32.2-14.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-software-0:3.30.6-3.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-software-0:3.30.6-3.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-terminal-0:3.28.3-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-terminal-0:3.28.3-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-tweaks-0:3.28.1-7.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gnome-tweaks-0:3.28.1-7.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gsettings-desktop-schemas-0:3.32.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gsettings-desktop-schemas-0:3.32.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gtk3-0:3.22.30-5.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gtk3-0:3.22.30-5.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gvfs-0:1.36.2-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
gvfs-0:1.36.2-8.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
libvncserver-0:0.9.11-14.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
libvncserver-0:0.9.11-14.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
libxslt-0:1.1.32-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
libxslt-0:1.1.32-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mozjs52-0:52.9.0-2.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mozjs52-0:52.9.0-2.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mozjs60-0:60.9.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mozjs60-0:60.9.0-4.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mutter-0:3.32.2-34.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
mutter-0:3.32.2-34.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
nautilus-0:3.28.1-12.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
nautilus-0:3.28.1-12.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
vala-0:0.40.19-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
vala-0:0.40.19-1.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
vinagre-0:3.22.0-21.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 8
vinagre-0:3.22.0-21.el8
Fixed · RHSA-2020:1766
Red Hat Enterprise Linux 6
gdm
Will not fix
Red Hat Enterprise Linux 7
gdm
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | LibRaw-0:0.19.5-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | LibRaw-0:0.19.5-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | accountsservice-0:0.6.50-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | accountsservice-0:0.6.50-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | appstream-data-0:8-20191129.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | appstream-data-0:8-20191129.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | baobab-0:3.28.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | baobab-0:3.28.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | clutter-0:1.26.2-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | clutter-0:1.26.2-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | evince-0:3.28.4-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | evince-0:3.28.4-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gdm-1:3.28.3-29.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gdm-1:3.28.3-29.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gjs-0:1.56.2-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gjs-0:1.56.2-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-boxes-0:3.28.5-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-boxes-0:3.28.5-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-control-center-0:3.28.2-19.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-control-center-0:3.28.2-19.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-menus-0:3.13.3-11.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-menus-0:3.13.3-11.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-online-accounts-0:3.28.2-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-online-accounts-0:3.28.2-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-remote-desktop-0:0.1.6-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-remote-desktop-0:0.1.6-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-session-0:3.28.1-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-session-0:3.28.1-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-settings-daemon-0:3.32.0-9.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-settings-daemon-0:3.32.0-9.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-shell-0:3.32.2-14.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-shell-0:3.32.2-14.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-software-0:3.30.6-3.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-software-0:3.30.6-3.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-terminal-0:3.28.3-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-terminal-0:3.28.3-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-tweaks-0:3.28.1-7.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gnome-tweaks-0:3.28.1-7.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gsettings-desktop-schemas-0:3.32.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gsettings-desktop-schemas-0:3.32.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gtk3-0:3.22.30-5.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gtk3-0:3.22.30-5.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gvfs-0:1.36.2-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | gvfs-0:1.36.2-8.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | libvncserver-0:0.9.11-14.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | libvncserver-0:0.9.11-14.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | libxslt-0:1.1.32-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | libxslt-0:1.1.32-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mozjs52-0:52.9.0-2.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mozjs52-0:52.9.0-2.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mozjs60-0:60.9.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mozjs60-0:60.9.0-4.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mutter-0:3.32.2-34.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | mutter-0:3.32.2-34.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | nautilus-0:3.28.1-12.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | nautilus-0:3.28.1-12.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | vala-0:0.40.19-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | vala-0:0.40.19-1.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | vinagre-0:3.22.0-21.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 8 | vinagre-0:3.22.0-21.el8 | Fixed | RHSA-2020:1766 |
| Red Hat Enterprise Linux 6 | gdm | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | gdm | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Ensure timed login is not enabled in gdm configuration, by checking the output of: ~~~ grep TimedLogin /etc/gdm/custom.conf ~~~
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:L/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2021-2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.50% (0.00504) | 40.94th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.50% (0.00504) | 42.11th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.09% (0.00089) | 38.47th | v3 (v2023.03.01) |
| Jun 26, 2024 | 0.09% (0.00089) | 38.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.09% (0.00089) | 36.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.40% (0.01404) | 49.02th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (8)
- https://access.redhat.com/security/cve/CVE-2019-3825 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1672825 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3825 x_refsource_CONFIRMExploitIssue TrackingMitigationThird Party Advisory
- https://gitlab.gnome.org/GNOME/gdm/issues/460
- https://gitlab.gnome.org/GNOME/gdm/merge_requests/58
- https://nvd.nist.gov/vuln/detail/CVE-2019-3825
- https://usn.ubuntu.com/3892-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-3825
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2019-3825 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1672825 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3825 | x_refsource_CONFIRMExploitIssue TrackingMitigationThird Party Advisory | |
| https://gitlab.gnome.org/GNOME/gdm/issues/460 | ||
| https://gitlab.gnome.org/GNOME/gdm/merge_requests/58 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2019-3825 | ||
| https://usn.ubuntu.com/3892-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-3825 |
Change history (0)
No recorded changes yet.