Vulnerability-Lookup

CVE-2020-8551 (GCVE-0-2020-8551)

Vulnerability from cvelistv5 – Published: 2020-03-27 14:25 – Updated: 2024-08-04 10:03

Title

Kubernetes kubelet denial of service

Summary

The Kubelet component in versions 1.15.0-1.15.9, 1.16.0-1.16.6, and 1.17.0-1.17.2 has been found to be vulnerable to a denial of service attack via the kubelet API, including the unauthenticated HTTP read-only API typically served on port 10255, and the authenticated HTTPS API typically served on port 10250.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-789 - Uncontrolled Memory Allocation

Assigner

kubernetes

References

4 references

URL	Tags
https://github.com/kubernetes/kubernetes/issues/89377	x_refsource_MISC
https://groups.google.com/forum/#%21topic/kuberne…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020041…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Impacted products

1 product

Vendor	Product	Version
Kubernetes	Kubernetes	Affected: unspecified , < v1.17.3 (custom) Affected: unspecified , < v1.16.7 (custom) Affected: unspecified , < v1.15.10 (custom)

Credits

Henrik Schmidt

Show details on NVD website

JSON

To clipboard

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  }
}

RHSA-2020_1277

Vulnerability from csaf_redhat - Published: 2020-04-08 07:14 - Updated: 2024-12-15 18:59

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.3.10 openshift-enterprise-hyperkube-container security update

Severity

Moderate

Notes

Topic: An update for openshift-enterprise-hyperkube-container is now available for Red Hat OpenShift Container Platform 4.3. 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: 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: crafted requests to kubelet API allowed for memory exhaustion (CVE-2020-8551) 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.

Terms of Use: 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.

CVE-2020-8551

A denial of service flaw was found in Kubernetes' Kubelet API. A remote attacker can exploit this flaw by sending repeated, crafted HTTP requests to exhaust available memory and cause a crash.

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-400 - Uncontrolled Resource Consumption

Affected products

Fixed 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64		—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2020:1277	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=1816403	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2020-8551	self
https://bugzilla.redhat.com/show_bug.cgi?id=1816403	external
https://www.cve.org/CVERecord?id=CVE-2020-8551	external
https://nvd.nist.gov/vuln/detail/CVE-2020-8551	external
https://github.com/kubernetes/kubernetes/issues/89377	external
https://groups.google.com/forum/#!topic/kubernete…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "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": "An update for openshift-enterprise-hyperkube-container is now available for Red Hat OpenShift Container Platform 4.3.\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": "Red Hat OpenShift Container Platform is Red Hat\u0027s cloud computing\nKubernetes application platform solution designed for on-premise or private\ncloud deployments.\n\nSecurity Fix(es):\n\n* kubernetes: crafted requests to kubelet API allowed for memory exhaustion (CVE-2020-8551)\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.",
        "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"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2020:1277",
        "url": "https://access.redhat.com/errata/RHSA-2020:1277"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#moderate",
        "url": "https://access.redhat.com/security/updates/classification/#moderate"
      },
      {
        "category": "external",
        "summary": "1816403",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1816403"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_1277.json"
      }
    ],
    "title": "Red Hat Security Advisory: OpenShift Container Platform 4.3.10 openshift-enterprise-hyperkube-container security update",
    "tracking": {
      "current_release_date": "2024-12-15T18:59:33+00:00",
      "generator": {
        "date": "2024-12-15T18:59:33+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.3"
        }
      },
      "id": "RHSA-2020:1277",
      "initial_release_date": "2020-04-08T07:14:39+00:00",
      "revision_history": [
        {
          "date": "2020-04-08T07:14:39+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2020-04-08T07:14:39+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-12-15T18:59:33+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat OpenShift Container Platform 4.3",
                "product": {
                  "name": "Red Hat OpenShift Container Platform 4.3",
                  "product_id": "7Server-RH7-RHOSE-4.3",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openshift:4.3::el7"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat OpenShift Enterprise"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64",
                "product": {
                  "name": "openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64",
                  "product_id": "openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64",
                  "product_identification_helper": {
                    "purl": "pkg:oci/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491?arch=amd64\u0026repository_url=registry.redhat.io/openshift4/ose-hyperkube\u0026tag=v4.3.10-202003311925"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "amd64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64 as a component of Red Hat OpenShift Container Platform 4.3",
          "product_id": "7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64"
        },
        "product_reference": "openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64",
        "relates_to_product_reference": "7Server-RH7-RHOSE-4.3"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-8551",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "discovery_date": "2020-03-23T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1816403"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A denial of service flaw was found in Kubernetes\u0027 Kubelet API. A remote attacker can exploit this flaw by sending repeated, crafted HTTP requests to exhaust available memory and cause a crash.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kubernetes: crafted requests to kubelet API allow for memory exhaustion",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "By default, OpenShift Container Platform does not allow unauthenticated access to the Kubelet API. OpenShift Container Platform versions before 4.2 are not affected by this vulnerability as they are based on earlier versions of Kubernetes which do not include metrics for the Kubelet HTTP server.",
          "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": [
          "7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-8551"
        },
        {
          "category": "external",
          "summary": "RHBZ#1816403",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1816403"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-8551",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-8551"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-8551",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8551"
        },
        {
          "category": "external",
          "summary": "https://github.com/kubernetes/kubernetes/issues/89377",
          "url": "https://github.com/kubernetes/kubernetes/issues/89377"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/forum/#!topic/kubernetes-security-announce/2UOlsba2g0s",
          "url": "https://groups.google.com/forum/#!topic/kubernetes-security-announce/2UOlsba2g0s"
        }
      ],
      "release_date": "2020-03-23T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-04-08T07:14:39+00:00",
          "details": "For OpenShift Container Platform 4.3 see the following documentation, which\nwill be updated shortly for release 4.3.10, for important instructions on\nhow to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.openshift.com/container-platform/4.3/release_notes/ocp-4-3-release-notes.html\n\nDetails on how to access this content are available at\nhttps://docs.openshift.com/container-platform/4.3/updating/updating-cluster-cli.html.",
          "product_ids": [
            "7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:1277"
        },
        {
          "category": "workaround",
          "details": "Prevent unauthenticated or unauthorized access to the Kubelet API",
          "product_ids": [
            "7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "7Server-RH7-RHOSE-4.3:openshift4/ose-hyperkube@sha256:cfc68acee9fb003f2c74820d0a2b0e3e3c677a658d5f76fc2c0481ee99124491_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kubernetes: crafted requests to kubelet API allow for memory exhaustion"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2020-8551 (GCVE-0-2020-8551)

RHSA-2020_1277

Tags

Sightings

Nomenclature