It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2437 advisory.

  - golang: crypto/elliptic: incorrect operations on the P-224 curve (CVE-2021-3114)

  - gogo/protobuf: plugin/unmarshal/unmarshal.go lacks certain index validation (CVE-2021-3121)

  - openshift: Injected service-ca.crt incorrectly contains additional internal CAs (CVE-2021-3636)

  - python-eventlet: improper handling of highly compressed data and memory allocation with excessive size     allows DoS (CVE-2021-21419)

  - jenkins-2-plugins/matrix-auth: Incorrect permission checks in Matrix Authorization Strategy Plugin     (CVE-2021-21623)

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 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2437 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 RPM packages for Red Hat OpenShift Container Platform 4.8.2. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHSA-2021:2438

    Security Fix(es):

    * gogo/protobuf: plugin/unmarshal/unmarshal.go lacks certain index validation (CVE-2021-3121)

    * golang: crypto/elliptic: incorrect operations on the P-224 curve (CVE-2021-3114)

    * openshift: Injected service-ca.crt incorrectly contains additional internal CAs (CVE-2021-3636)

    * python-eventlet: improper handling of highly compressed data and memory allocation with excessive size     allows DoS (CVE-2021-21419)

    * jenkins-2-plugins/matrix-auth: Incorrect permission checks in Matrix Authorization Strategy Plugin     (CVE-2021-21623)

    * jenkins-2-plugins/credentials: Reflected XSS vulnerability in Credentials Plugin (CVE-2021-21648)

    * kubernetes: Validating Admission Webhook does not observe some previous fields (CVE-2021-25735)

    * jenkins: lack of type validation in agent related REST API (CVE-2021-21639)

    * jenkins: view name validation bypass (CVE-2021-21640)

    * kubernetes: Holes in EndpointSlice Validation Enable Host Network Hijack (CVE-2021-25737)

    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.

    All OpenShift Container Platform 4.8 users are advised to upgrade to these updated packages and images     when they are available in the appropriate release channel. To check for available updates, use the     OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at     https://docs.openshift.com/container-platform/4.8/updating/updating-cluster-between-     minor.html#understanding-upgrade-channels_updating-cluster-between-minor

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.

ID	Name	Product	Family	Type	Severity
312421	RHCOS 4 : OpenShift Container Platform 4.8.2 (RHSA-2021:2437)	Nessus	Red Hat Local Security Checks	Local	medium
152103	RHEL 7 / 8 : OpenShift Container Platform 4.8.2 (RHSA-2021:2437)	Nessus	Red Hat Local Security Checks	Local	high

Detections

Analytics

CVE-2021-3636

medium

Tenable Plugins

medium

high