{
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      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "The components for Windows Container Support for Red Hat OpenShift 2.0.1 are now available.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Windows Container Support for Red Hat OpenShift allows you to deploy Windows container workloads running on Windows Server containers.\n\nSecurity Fix(es):\n\n* kubernetes: LoadBalancer Service type don\u0027t create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM (CVE-2021-25736)\n\nFor 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.\n\nBug Fix(es):\n\n* WMCO patch pub-key-hash annotation to Linux node (BZ#1945248)\n\n* LoadBalancer Service type with invalid external loadbalancer IP breaks the datapath (BZ#1952917)\n\n* Telemetry info not completely available to identify windows nodes (BZ#1955319)\n\n* WMCO incorrectly shows node as ready after a failed configuration (BZ#1956412)\n\n* kube-proxy service terminated unexpectedly after recreated LB service (BZ#1963263)",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
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    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2021:2130",
        "url": "https://access.redhat.com/errata/RHSA-2021:2130"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#moderate",
        "url": "https://access.redhat.com/security/updates/classification/#moderate"
      },
      {
        "category": "external",
        "summary": "1945248",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1945248"
      },
      {
        "category": "external",
        "summary": "1946538",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1946538"
      },
      {
        "category": "external",
        "summary": "1952917",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1952917"
      },
      {
        "category": "external",
        "summary": "1955319",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955319"
      },
      {
        "category": "external",
        "summary": "1956412",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1956412"
      },
      {
        "category": "external",
        "summary": "1963263",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1963263"
      },
      {
        "category": "external",
        "summary": "WINC-623",
        "url": "https://issues.redhat.com/browse/WINC-623"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_2130.json"
      }
    ],
    "title": "Red Hat Security Advisory: Windows Container Support for Red Hat OpenShift 2.0.1 security and bug fix update",
    "tracking": {
      "current_release_date": "2024-11-05T23:38:16+00:00",
      "generator": {
        "date": "2024-11-05T23:38:16+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.1.1"
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      "initial_release_date": "2021-06-23T05:37:46+00:00",
      "revision_history": [
        {
          "date": "2021-06-23T05:37:46+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2021-06-23T05:37:46+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-05T23:38:16+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
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  "product_tree": {
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        "branches": [
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            "branches": [
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                "name": "Red Hat OpenShift Container Platform 4.7",
                "product": {
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                  "product_id": "8Base-RHOSE-4.7",
                  "product_identification_helper": {
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                  }
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            "name": "Red Hat OpenShift Enterprise"
          },
          {
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                "name": "openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
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                  "name": "openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
                  "product_id": "openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
                  "product_identification_helper": {
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                "product": {
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                  "product_id": "openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64",
                  "product_identification_helper": {
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            ],
            "category": "architecture",
            "name": "amd64"
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        "category": "vendor",
        "name": "Red Hat"
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    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64 as a component of Red Hat OpenShift Container Platform 4.7",
          "product_id": "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64"
        },
        "product_reference": "openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
        "relates_to_product_reference": "8Base-RHOSE-4.7"
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        "full_product_name": {
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          "product_id": "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64"
        },
        "product_reference": "openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64",
        "relates_to_product_reference": "8Base-RHOSE-4.7"
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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Eric Paris",
            "Christian Hernandez"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2021-25736",
      "cwe": {
        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
      },
      "discovery_date": "2021-04-06T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1946538"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Windows kube-proxy component. In a cloud environment that does not set the \u201c.status.loadBalancer.ingress.ip\u201d field in the LoadBalancer service status configuration (for example in AWS) the packets can be misrouted and reach an unintended destination.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kubernetes: LoadBalancer Service type don\u0027t create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Clusters where the LoadBalancer controller sets the \u201cstatus.loadBalancer.ingress[].ip\u201d field are unaffected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
          "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-25736"
        },
        {
          "category": "external",
          "summary": "RHBZ#1946538",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1946538"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-25736",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-25736"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-25736",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25736"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q",
          "url": "https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q"
        }
      ],
      "release_date": "2021-05-10T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-06-23T05:37:46+00:00",
          "details": "For Windows Machine Config Operator upgrades, see the following documentation:\n\nhttps://docs.openshift.com/container-platform/4.7/windows_containers/windows-node-upgrades.html",
          "product_ids": [
            "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
            "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:2130"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-operator-bundle@sha256:60ab0ad722725d13abdede0fa569ee4ad2ec95350584dfd51c016510142f0523_amd64",
            "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kubernetes: LoadBalancer Service type don\u0027t create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM"
    }
  ]
}