gdm: lock screen can be circumvented when autologin is set
Published Jul 26, 2018
6.4
MEDIUMCVSS 3.0
EPSS 0.39%
Description
A flaw was discovered in gdm 3.24.1 where gdm greeter was no longer setting the ran_once boolean during autologin. If autologin was enabled for a victim, an attacker could simply select 'login as another user' to unlock their screen.
Affected products
-
- Version 3.24.1StatusaffectedConstraints-
- Version
- 3.24.1
No data.
Red Hat Enterprise Linux 5
gdm
Not affected
Red Hat Enterprise Linux 6
gdm
Not affected
Red Hat Enterprise Linux 7
gdm
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | gdm | Not affected | n/a |
| Red Hat Enterprise Linux 6 | gdm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | gdm | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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:L/PR:N/UI:R/S:U/C:L/I:L/A:L
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 1, 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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00385) | 30.17th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.39% (0.00385) | 32.48th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00077) | 33.69th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.08% (0.00077) | 33.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00077) | 31.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2017-12164 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1490417 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12164 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://gitlab.gnome.org/GNOME/gdm/commit/ff98b28 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-12164
- https://www.cve.org/CVERecord?id=CVE-2017-12164
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2017-12164 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1490417 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12164 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://gitlab.gnome.org/GNOME/gdm/commit/ff98b28 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-12164 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-12164 |
Change history (0)
No recorded changes yet.