csaf_redhat - rhsa-2021

rhsa-2021_2130

Vulnerability from csaf_redhat

Published

2021-06-23 05:37

Modified

2024-11-22 17:00

Summary

Red Hat Security Advisory: Windows Container Support for Red Hat OpenShift 2.0.1 security and bug fix update

Notes

Topic

The components for Windows Container Support for Red Hat OpenShift 2.0.1 are now available. Red 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.

Details

Windows Container Support for Red Hat OpenShift allows you to deploy Windows container workloads running on Windows Server containers. Security Fix(es): * kubernetes: LoadBalancer Service type don't create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM (CVE-2021-25736) 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. Bug Fix(es): * WMCO patch pub-key-hash annotation to Linux node (BZ#1945248) * LoadBalancer Service type with invalid external loadbalancer IP breaks the datapath (BZ#1952917) * Telemetry info not completely available to identify windows nodes (BZ#1955319) * WMCO incorrectly shows node as ready after a failed configuration (BZ#1956412) * kube-proxy service terminated unexpectedly after recreated LB service (BZ#1963263)

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.

JSON

To clipboard

{
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      "text": "Moderate"
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    "category": "csaf_security_advisory",
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        "title": "Topic"
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        "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"
      },
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        "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.",
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    "title": "Red Hat Security Advisory: Windows Container Support for Red Hat OpenShift 2.0.1 security and bug fix update",
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            "Christian Hernandez"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
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      "cve": "CVE-2021-25736",
      "cwe": {
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        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
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          "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": {
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1946538"
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        {
          "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": [
        {
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          "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",
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            "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"
          },
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            "8Base-RHOSE-4.7:openshift4-wincw/windows-machine-config-rhel8-operator@sha256:34a7784ef1e4cd3aa4a8c2151006ef56a60c8b30c9a7e25cdb198036de8c27e9_amd64"
          ]
        }
      ],
      "threats": [
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        }
      ],
      "title": "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

Vulnerability from cvelistv5

Published

2023-10-30 02:19

Modified

2024-08-03 20:11

Severity ?

5.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N

Summary

Windows kube-proxy LoadBalancer contention

References

▼	URL	Tags
	https://github.com/kubernetes/kubernetes/pull/99958
	https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ
	https://security.netapp.com/advisory/ntap-20231221-0003/

Impacted products

▼	Vendor	Product
	Kubernetes	Kubernetes

Show details on NVD website

JSON

To clipboard

{
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    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:11:28.044Z",
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            "url": "https://security.netapp.com/advisory/ntap-20231221-0003/"
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    ],
    "cna": {
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          "modules": [
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
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    "cveId": "CVE-2021-25736",
    "datePublished": "2023-10-30T02:19:48.916Z",
    "dateReserved": "2021-01-21T21:42:58.237Z",
    "dateUpdated": "2024-08-03T20:11:28.044Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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