A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with world-readable access permissions. This flaw allows a local attacker to have read access to potentially sensitive data. The highest threat from this vulnerability is to confidentiality.

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3758 advisory.

  - coreos-installer: restrict access permissions on /boot/ignition{,/config.ign} (CVE-2021-3917)

  - jetty: requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the     WEB-INF directory (CVE-2021-28169)

  - golang: archive/zip: malformed archive may cause panic or memory exhaustion (CVE-2021-33196)

  - jetty: SessionListener can prevent a session from being invalidated breaking logout (CVE-2021-34428)

  - openvswitch: use-after-free in decode_NXAST_RAW_ENCAP during the decoding of a RAW_ENCAP action     (CVE-2021-36980)

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 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4829 advisory.

  - coreos-installer: restrict access permissions on /boot/ignition{,/config.ign} (CVE-2021-3917)

  - jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)

  - jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to     outside allowed directories (CVE-2021-21686)

  - jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic     link (CVE-2021-21687)

  - jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted     read access (CVE-2021-21688)

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.

  - A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with     world-readable access permissions. This flaw allows a local attacker to have read access to potentially     sensitive data. The highest threat from this vulnerability is to confidentiality. (CVE-2021-3917)

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

The remote Redhat Enterprise Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3758 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 4.9.0. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHSA-2021:3759

    Security Fix(es):

    * jetty: requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the     WEB-INF directory (CVE-2021-28169)

    * golang: archive/zip: malformed archive may cause panic or memory exhaustion (CVE-2021-33196)

    * openvswitch: use-after-free in decode_NXAST_RAW_ENCAP during the decoding of a RAW_ENCAP action     (CVE-2021-36980)

    * jetty: SessionListener can prevent a session from being invalidated breaking logout (CVE-2021-34428)

    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 4.9 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/4.9/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.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4829 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 4.8.22. See the following     advisory for the container images for this release:

    https://access.redhat.com/errata/RHBA-2021:4830

    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

    Security Fix(es):

    * jenkins-2-plugins/subversion: does not restrict the name of a file when looking up a subversion key     (CVE-2021-21698)
    * jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)
    * jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to     outside allowed directories (CVE-2021-21686)
    * jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic     link (CVE-2021-21687)
    * jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have     unrestricted read access (CVE-2021-21688)
    * coreos-installer: restrict access permissions on /boot/ignition{,/config.ign} (CVE-2021-3917)
    * jenkins: FilePath#unzip and FilePath#untar were not subject to any access control (CVE-2021-21689)
    * jenkins: Agent processes are able to completely bypass file path filtering by wrapping the file     operation in an agent file path (CVE-2021-21690)
    * jenkins: Creating symbolic links is possible without the symlink permission (CVE-2021-21691)
    * jenkins: The operations FilePath#renameTo and FilePath#moveAllChildrenTo only check read permission on     the source path (CVE-2021-21692)
    * jenkins: When creating temporary files, permission to create files is only checked after theyve been     created. (CVE-2021-21693)
    * jenkins: FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and     FilePath#get*DiskSpace do not check any permissions (CVE-2021-21694)
    * jenkins: FilePath#listFiles lists files outside directories with agent read access when following     symbolic links. (CVE-2021-21695)
    * jenkins: Agent-to-controller access control allowed writing to sensitive directory used by Pipeline:
    Shared Groovy Libraries Plugin (CVE-2021-21696)
    * jenkins: Agent-to-controller access control allows reading/writing most content of build directories     (CVE-2021-21697)

    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.

ID	Name	Product	Family	Type	Severity
312566	RHCOS 4 : OpenShift Container Platform 4.9.0 (RHSA-2021:3758)	Nessus	Red Hat Local Security Checks	Local	medium
312475	RHCOS 4 : OpenShift Container Platform 4.8.22 (RHSA-2021:4829)	Nessus	Red Hat Local Security Checks	Local	critical
260327	Linux Distros Unpatched Vulnerability : CVE-2021-3917	Nessus	Misc.	Local	medium
165134	RHEL 7 / 8 : OpenShift Container Platform 4.9.0 (RHSA-2021:3758)	Nessus	Red Hat Local Security Checks	Local	medium
155755	RHEL 8 : OpenShift Container Platform 4.8.22 (RHSA-2021:4829)	Nessus	Red Hat Local Security Checks	Local	critical

Detections

Analytics

CVE-2021-3917

medium

Tenable Plugins

medium

critical

medium

medium

critical