mgetty: Stack-based buffer overflow with long username in contrib/next-login/login.c
Published Sep 13, 2018
7.8
HIGHCVSS 3.0
EPSS 0.45%
Description
An issue was discovered in mgetty before 1.2.1. In contrib/next-login/login.c, the command-line parameter username is passed unsanitized to strcpy(), which can cause a stack-based buffer overflow.
Affected products
No data.
- < 1.2.1
No data.
Red Hat Enterprise Linux 5
mgetty
Not affected
Red Hat Enterprise Linux 6
mgetty
Not affected
Red Hat Enterprise Linux 7
mgetty
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | mgetty | Not affected | n/a |
| Red Hat Enterprise Linux 6 | mgetty | Not affected | n/a |
| Red Hat Enterprise Linux 7 | mgetty | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of mgetty as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include the patched login binary provided by mgetty.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
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 2, 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 2, 2026 | 0.45% (0.00448) | 36.67th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.45% (0.00448) | 38.30th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.05% (0.00051) | 20.64th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.05% (0.00051) | 20.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00051) | 18.04th | 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 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (5)
- https://access.redhat.com/security/cve/CVE-2018-16743 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1629973 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-16743
- https://www.cve.org/CVERecord?id=CVE-2018-16743
- https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-16743 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1629973 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-16743 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-16743 | ||
| https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.