FKIE_CVE-2021-25741

Vulnerability from fkie_nvd - Published: 2021-09-20 17:15 - Updated: 2026-06-17 03:42
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.
References
jordan@liggitt.nethttps://github.com/kubernetes/kubernetes/issues/104980Mitigation, Third Party Advisory
jordan@liggitt.nethttps://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7sMailing List, Mitigation
jordan@liggitt.nethttps://security.netapp.com/advisory/ntap-20211008-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/kubernetes/kubernetes/issues/104980Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7sMailing List, Mitigation
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20211008-0006/Third Party Advisory
Impacted products
Vendor Product Version
kubernetes kubernetes *
kubernetes kubernetes *
kubernetes kubernetes *
kubernetes kubernetes *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Kubernetes",
          "vendor": "Kubernetes",
          "versions": [
            {
              "lessThanOrEqual": "1.19.14",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.20.10",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.21.4",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.22.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "jordan@liggitt.net"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "kubernetes",
          "vendor": "kubernetes",
          "versions": [
            {
              "lessThanOrEqual": "1.19.14",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.20.10",
              "status": "affected",
              "version": "1.20.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.21.4",
              "status": "affected",
              "version": "1.21.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.22.1",
              "status": "affected",
              "version": "1.22.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "294F8F39-19EC-48D3-8013-C35B7E3076B5",
              "versionEndIncluding": "1.19.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "816775F6-5488-47BB-8080-DF5D12D14C69",
              "versionEndIncluding": "1.20.10",
              "versionStartIncluding": "1.20.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A62C3A55-B83B-42E1-B6B1-E7395D2DB930",
              "versionEndIncluding": "1.21.4",
              "versionStartIncluding": "1.21.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6683F913-E546-4C97-A5E7-09FB6FDB0D37",
              "versionEndIncluding": "1.22.1",
              "versionStartIncluding": "1.22.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files \u0026 directories outside of the volume, including on the host filesystem."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema de seguridad en Kubernetes en el que un usuario puede ser capaz de crear un contenedor con montajes de volumen de sub-ruta para acceder a archivos y directorios fuera del volumen, incluso en el sistema de archivos del host"
    }
  ],
  "id": "CVE-2021-25741",
  "lastModified": "2026-06-17T03:42:23.107",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "jordan@liggitt.net",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-25741",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-08-20T13:25:58.469004Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-09-20T17:15:08.343",
  "references": [
    {
      "source": "jordan@liggitt.net",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://github.com/kubernetes/kubernetes/issues/104980"
    },
    {
      "source": "jordan@liggitt.net",
      "tags": [
        "Mailing List",
        "Mitigation"
      ],
      "url": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s"
    },
    {
      "source": "jordan@liggitt.net",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20211008-0006/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://github.com/kubernetes/kubernetes/issues/104980"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Mitigation"
      ],
      "url": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20211008-0006/"
    }
  ],
  "sourceIdentifier": "jordan@liggitt.net",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "jordan@liggitt.net",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

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