samba: S4U2Self crash with MIT KDC build
Published Nov 28, 2018
7.5
HIGHCVSS 3.0
EPSS 3.08%
Description
Samba from version 4.7.0 has a vulnerability that allows a user in a Samba AD domain to crash the KDC when Samba is built in the non-default MIT Kerberos configuration. With this advisory the Samba Team clarify that the MIT Kerberos build of the Samba AD DC is considered experimental. Therefore the Samba Team will not issue security patches for this configuration. Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been issued as security releases to prevent building of the AD DC with MIT Kerberos unless --with-experimental-mit-ad-dc is specified to the configure command.
Affected products
- Vendor n/a Product Samba Defaultn/a
- Version 4.7.12StatusaffectedConstraints-
- Version 4.8.7StatusaffectedConstraints-
- Version 4.9.3StatusaffectedConstraints-
- 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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n/a | Samba | n/a |
|
No data.
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
Red Hat Enterprise Linux 6
samba4
Not affected
Red Hat Enterprise Linux 7
samba
Not affected
Red Hat Enterprise Linux 8
samba
Not affected
Red Hat Storage 3
samba
Not affected
Red Hat Virtualization 4
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba4 | Not affected | n/a |
| Red Hat Enterprise Linux 7 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 8 | samba | Not affected | n/a |
| Red Hat Storage 3 | samba | Not affected | n/a |
| Red Hat Virtualization 4 | samba | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux because there is no support for samba as Active Directory Domain Controller.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 3.08% (0.03081) | 87.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.08% (0.03081) | 85.93th | v5 (v2026.06.15) |
| Mar 10, 2026 | 4.91% (0.04908) | 89.43th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.78% (0.03783) | 87.28th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.97% (0.02975) | 90.64th | v3 (v2023.03.01) |
| May 30, 2024 | 4.16% (0.04164) | 92.19th | v3 (v2023.03.01) |
| Apr 20, 2024 | 4.86% (0.04855) | 92.65th | v3 (v2023.03.01) |
| Mar 8, 2024 | 3.62% (0.03622) | 91.39th | v3 (v2023.03.01) |
| Dec 27, 2023 | 2.59% (0.02594) | 89.18th | v3 (v2023.03.01) |
| Nov 22, 2023 | 1.34% (0.01340) | 84.59th | v3 (v2023.03.01) |
| Apr 26, 2023 | 1.47% (0.01468) | 84.75th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.54% (0.01541) | 85.03th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v1 |
| Jan 6, 2022 | 1.25% (0.01247) | 29.93th | v1 |
| Sep 1, 2021 | 1.25% (0.01247) | 68.62th | v1 |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/106026 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-16853 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1647246 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16853 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-16853
- https://security.gentoo.org/glsa/202003-52 vendor-advisoryx_refsource_GENTOO
- https://security.netapp.com/advisory/ntap-20181127-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-16853
- https://www.samba.org/samba/security/CVE-2018-16853.html x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106026 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-16853 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1647246 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16853 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-16853 | ||
| https://security.gentoo.org/glsa/202003-52 | vendor-advisoryx_refsource_GENTOO | |
| https://security.netapp.com/advisory/ntap-20181127-0001/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-16853 | ||
| https://www.samba.org/samba/security/CVE-2018-16853.html | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.