CVE-2019-14870
Gentoo Linux Security Advisory 202310-06
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set.
Todas las versiones de Samba 4.xx anteriores a 4.9.17, versiones 4.10.x anteriores a 4.10.11 y versiones 4.11.x anteriores a 4.11.3, presentan un problema, donde el modelo de delegación de Kerberos S4U (MS-SFU) incluye una funcionalidad que permite a un subconjunto de clientes ser excluidos de la delegación restringida de cualquier manera, ya sea S4U2Self o autenticación Kerberos regular, al forzar que todos los tickets para estos clientes no sean reenviables. En AD, esto es implementado mediante un atributo de usuario delegation_not_allowed (también se conoce como no delegado), que se traduce como no permitido-reenviable. Sin embargo, el AD DC Samba no hace eso para S4U2Self y establece el flag reenviable inclusive si el cliente suplantado tiene el conjunto de flags no delegados.
USN-4217-1 fixed several vulnerabilities in Samba. This update provides the corresponding update for Ubuntu 14.04 ESM. Andreas Oster discovered that the Samba DNS management server incorrectly handled certain records. An authenticated attacker could possibly use this issue to crash Samba, resulting in a denial of service. Various other issues were also addressed.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-08-10 CVE Reserved
- 2019-12-10 CVE Published
- 2024-08-05 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-285: Improper Authorization
- CWE-287: Improper Authentication
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870 | Issue Tracking | |
| https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html | Mailing List |
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| https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html | Mailing List |
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| https://security.netapp.com/advisory/ntap-20191210-0002 | Third Party Advisory |
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| https://security.netapp.com/advisory/ntap-20230216-0008 |
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| https://www.synology.com/security/advisory/Synology_SA_19_40 | Third Party Advisory |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Samba Search vendor "Samba" | Samba Search vendor "Samba" for product "Samba" | >= 4.0.0 < 4.9.17 Search vendor "Samba" for product "Samba" and version " >= 4.0.0 < 4.9.17" | - |
Affected
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| Samba Search vendor "Samba" | Samba Search vendor "Samba" for product "Samba" | >= 4.10.0 < 4.10.11 Search vendor "Samba" for product "Samba" and version " >= 4.10.0 < 4.10.11" | - |
Affected
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| Samba Search vendor "Samba" | Samba Search vendor "Samba" for product "Samba" | >= 4.11.0 < 4.11.3 Search vendor "Samba" for product "Samba" and version " >= 4.11.0 < 4.11.3" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 30 Search vendor "Fedoraproject" for product "Fedora" and version "30" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 31 Search vendor "Fedoraproject" for product "Fedora" and version "31" | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | esm |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | esm |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04" | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.1 Search vendor "Opensuse" for product "Leap" and version "15.1" | - |
Affected
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