ghsa-55qj-gj3x-jq9r
Vulnerability from github
Published
2024-04-24 20:01
Modified
2024-06-10 19:36
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Denial of service in Kubernetes
Details

The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes/pkg/kubelet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.1.0"
            },
            {
              "fixed": "1.16.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes/pkg/kubelet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.17.0"
            },
            {
              "fixed": "1.17.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes/pkg/kubelet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.18.0"
            },
            {
              "fixed": "1.18.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-8557"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-04-24T20:01:31Z",
    "nvd_published_at": "2020-07-23T17:15:00Z",
    "severity": "MODERATE"
  },
  "details": "The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.",
  "id": "GHSA-55qj-gj3x-jq9r",
  "modified": "2024-06-10T19:36:51Z",
  "published": "2024-04-24T20:01:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8557"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/issues/93032"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/pull/92921"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/commit/530f199b6e07cdaab32361e39709ac45f3fdc446"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/commit/68750fefd3df76b7b008ef7b18e8acd18d5c2f2e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/commit/7fd849cffa2f93061fbcb0a6ae4efd0539b1e981"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-55qj-gj3x-jq9r"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kubernetes/kubernetes"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2024-2753"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200821-0002"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Denial of service in Kubernetes"
}


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