The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes runs tar inside the container to create a tar archive, copies it over the network, and kubectl unpacks it on the user’s machine. If the tar binary in the container is malicious, it could run any code and output unexpected, malicious results. An attacker could use this to write files to any path on the user’s machine when kubectl cp is called, limited only by the system permissions of the local user. Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.

The remote Red Hat Enterprise Linux CoreOS 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:3811 advisory.

  - atomic-openshift: OpenShift builds don't verify SSH Host Keys for the git repository (CVE-2019-10150)

  - kubernetes: Incomplete fixes for CVE-2019-1002101 and CVE-2019-11246, kubectl cp potential directory     traversal (CVE-2019-11249)

  - kubernetes: `kubectl cp` allows for arbitrary file write via double symlinks (CVE-2019-11251)

  - kubernetes: YAML parsing vulnerable to Billion Laughs attack, allowing for remote denial of service     (CVE-2019-11253)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Red Hat Enterprise Linux CoreOS 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:3239 advisory.

  - kubernetes: Incomplete fixes for CVE-2019-1002101 and CVE-2019-11246, kubectl cp potential directory     traversal (CVE-2019-11249)

  - kubernetes: YAML parsing vulnerable to Billion Laughs attack, allowing for remote denial of service     (CVE-2019-11253)

  - kube-apiserver: DoS with crafted patch of type json-patch (CVE-2019-1002100)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The kubectl cp command allows copying files between containers and the user machine. To copy files from a     container, Kubernetes runs tar inside the container to create a tar archive, copies it over the network,     and kubectl unpacks it on the user's machine. If the tar binary in the container is malicious, it could     run any code and output unexpected, malicious results. An attacker could use this to write files to any     path on the user's machine when kubectl cp is called, limited only by the system permissions of the local     user. Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions     prior to 1.15.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.
    (CVE-2019-11249)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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. (CVE-2019-11247)

  - The kubectl cp command allows copying files between containers and the user machine. To copy files from a
    container, Kubernetes runs tar inside the container to create a tar archive, copies it over the network,
    and kubectl unpacks it on the user’s machine. If the tar binary in the container is malicious, it could
    run any code and output unexpected, malicious results. An attacker could use this to write files to any
    path on the user’s machine when kubectl cp is called, limited only by the system permissions of the local
    user. Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions
    prior to 1.15.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.
    (CVE-2019-11249)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4816 advisory.

    - [CVE-2019-16276] Kubernetes Vulnerabilities Allow Authentication Bypass, DoS
    - [CVE-2019-16276] Support patching flannel/dashboard on upgrade
    - [CVE-2019-16276] Support patching etcd on upgrade
    - [CVE-2019-16276] while upgrading a cluster patch the coredns image
    - CVE-2019-16276 : Update flannel , etcd coredns and dashboard images.

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:3811 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    This advisory contains the atomic-openshift RPM package for Red Hat OpenShift Container Platform 3.9.102.

    Security Fix(es):

    * kubernetes: YAML parsing vulnerable to Billion Laughs attack, allowing for remote denial of service     (CVE-2019-11253)

    * atomic-openshift: OpenShift builds don't verify SSH Host Keys for the Git repository (CVE-2019-10150)

    * kubernetes: Incomplete fixes for CVE-2019-1002101 and CVE-2019-11246, kubectl cp potential directory     traversal (CVE-2019-11249)

    * kubernetes: `kubectl cp` allows for arbitrary file write via double symlinks (CVE-2019-11251)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:3239 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    Security Fix(es):

    * kubernetes: YAML parsing vulnerable to Billion Laughs attack, allowing for remote denial of service     (CVE-2019-11253)

    * kubernetes: Incomplete fixes for CVE-2019-1002101 and CVE-2019-11246, kubectl cp potential directory     traversal (CVE-2019-11249)

    * kube-apiserver: DoS with crafted patch of type json-patch (CVE-2019-1002100)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the kubernetes package has been released.

Update to v1.15.2 + carry upstream #81330

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
312504	RHCOS 3 : OpenShift Container Platform 3.9 atomic-openshift (RHSA-2019:3811)	Nessus	Red Hat Local Security Checks	medium
312484	RHCOS 3 : OpenShift Container Platform 3.10 atomic-openshift (RHSA-2019:3239)	Nessus	Red Hat Local Security Checks	medium
254618	Linux Distros Unpatched Vulnerability : CVE-2019-11249	Nessus	Misc.	medium
405058	Alpine: multiple k3s packages: security update to 0.8.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
405058	Alpine: multiple k3s packages: security update to 0.8.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
180704	Oracle Linux 7 : kubernetes (ELSA-2019-4816)	Nessus	Oracle Linux Local Security Checks	high
400525	Alpine: multiple k3s packages: security update to 0.7.0-r0 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	high
400525	Alpine: multiple k3s packages: security update to 0.7.0-r0 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
130747	RHEL 7 : OpenShift Container Platform 3.9 atomic-openshift (RHSA-2019:3811)	Nessus	Red Hat Local Security Checks	medium
130384	RHEL 7 : OpenShift Container Platform 3.10 atomic-openshift (RHSA-2019:3239)	Nessus	Red Hat Local Security Checks	medium
130125	Photon OS 3.0: Kubernetes PHSA-2019-3.0-0031	Nessus	PhotonOS Local Security Checks	high
129784	Photon OS 1.0: Kubernetes PHSA-2019-1.0-0252	Nessus	PhotonOS Local Security Checks	high
129691	Photon OS 2.0: Kubernetes PHSA-2019-2.0-0177	Nessus	PhotonOS Local Security Checks	high
129682	Photon OS 1.0: Kubernetes PHSA-2019-1.0-0255	Nessus	PhotonOS Local Security Checks	high
128127	Fedora 30 : kubernetes (2019-2b8ef08c95)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2019-11249

medium

Tenable Plugins

medium

medium

medium

high

high

high

high

high

medium

medium

high

high

high

high

high