The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty
Published Mar 17, 2021
7.8
HIGHCVSS 3.1
EPSS 0.40%
Description
The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.
Affected products
No data.
- 4.4
- 9.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:P/A:P
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 3, 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 (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.40% (0.00404) | 32.36th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.40% (0.00404) | 34.47th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.44% (0.00444) | 10.84th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.44% (0.00444) | 0.00th | v1 |
References (3)
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 x_refsource_MISCMailing ListVendor Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 x_refsource_MISCExploitMailing ListVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html mailing-listx_refsource_MLISTMailing ListVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 | x_refsource_MISCMailing ListVendor Advisory | |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 | x_refsource_MISCExploitMailing ListVendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html | mailing-listx_refsource_MLISTMailing ListVendor Advisory |
Change history (0)
No recorded changes yet.