CVE-2019-11247

Kubernetes kube-apiserver allows access to custom resources via wrong scope

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Kubernetes kube-apiserver mistakenly allows access to a cluster-scoped custom resource if the request is made as if the resource were namespaced. Authorizations for the resource accessed in this manner are enforced using roles and role bindings within the namespace, meaning that a user with access only to a resource in one namespace could create, view update or delete the cluster-scoped resource (according to their namespace role privileges). Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.

El kube-apiserver de Kubernetes permite por error el acceso a un recurso personalizado de ámbito de clúster si la solicitud se realiza como si el recurso estuviera con espacio de nombres. Las autorizaciones para el recurso al que se tiene acceso de esta manera se aplican mediante roles y enlaces de roles dentro del espacio de nombres, lo que significa que un usuario con acceso solo a un recurso en un espacio de nombres podría crear, ver actualizar o eliminar el recurso de ámbito de clúster (según sus privilegios de rol de espacio de nombres). Las versiones afectadas de Kubernetes incluyen versiones anteriores a 1.13.9, versiones anteriores a 1.14.5, versiones anteriores a 1.15.2 y versiones 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.

*Credits: Prabu Shyam, Verizon Media

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-04-17 CVE Reserved
2019-08-15 CVE Published
2024-07-29 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-284: Improper Access Control
CWE-863: Incorrect Authorization

CAPEC

References (9)

URL	Tag	Source
https://github.com/kubernetes/kubernetes/issues/80983	Third Party Advisory
https://groups.google.com/d/msg/kubernetes-security-announce/vUtEcSEY6SM/v2ZZxsmtFQAJ	Mailing List
https://security.netapp.com/advisory/ntap-20190919-0003	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHBA-2019:2816	2020-10-02
https://access.redhat.com/errata/RHBA-2019:2824	2020-10-02
https://access.redhat.com/errata/RHSA-2019:2690	2020-10-02
https://access.redhat.com/errata/RHSA-2019:2769	2020-10-02
https://access.redhat.com/security/cve/CVE-2019-11247	2019-10-24
https://bugzilla.redhat.com/show_bug.cgi?id=1732192	2019-10-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.7.0 <= 1.12.10 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.7.0 <= 1.12.10"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.13.0 < 1.13.9 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.13.0 < 1.13.9"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.14.0 < 1.14.5 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.14.0 < 1.14.5"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.15.0 < 1.15.2 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.15.0 < 1.15.2"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				1.12.11 Search vendor "Kubernetes" for product "Kubernetes" and version "1.12.11"		beta0		Affected
Redhat Search vendor "Redhat"		Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform"				3.9 Search vendor "Redhat" for product "Openshift Container Platform" and version "3.9"		-		Affected
Redhat Search vendor "Redhat"		Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform"				3.10 Search vendor "Redhat" for product "Openshift Container Platform" and version "3.10"		-		Affected
Redhat Search vendor "Redhat"		Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform"				3.11 Search vendor "Redhat" for product "Openshift Container Platform" and version "3.11"		-		Affected