CVE-2021-25741 (GCVE-0-2021-25741)

Vulnerability from cvelistv5 – Published: 2021-09-20 17:05 – Updated: 2024-09-16 23:26
VLAI?
Title
Symlink Exchange Can Allow Host Filesystem Access
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.
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Kubernetes Kubernetes Affected: unspecified , ≤ 1.19.14 (custom)
Affected: unspecified , ≤ 1.20.10 (custom)
Affected: unspecified , ≤ 1.21.4 (custom)
Affected: unspecified , ≤ 1.22.1 (custom)
Create a notification for this product.
Credits
Fabricio Voznika & Mark Wolters
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:11:27.655Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/kubernetes/kubernetes/issues/104980"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20211008-0006/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "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"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-25741",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-20T13:25:58.469004Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-20T13:37:41.191Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Fabricio Voznika \u0026 Mark Wolters"
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-10-08T14:06:36.000Z",
        "orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
        "shortName": "kubernetes"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubernetes/kubernetes/issues/104980"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20211008-0006/"
        }
      ],
      "source": {
        "defect": [
          "https://github.com/kubernetes/kubernetes/issues/104980"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Symlink Exchange Can Allow Host Filesystem Access",
      "x_ConverterErrors": {
        "DATE_PUBLIC": {
          "error": "v4 DATE_PUBLIC is invalid",
          "message": "hour must be in 0..23"
        }
      },
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@kubernetes.io",
          "DATE_PUBLIC": "2021-09-15T121:15:00.000Z",
          "ID": "CVE-2021-25741",
          "STATE": "PUBLIC",
          "TITLE": "Symlink Exchange Can Allow Host Filesystem Access"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Kubernetes",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "1.19.14"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "1.20.10"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "1.21.4"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "1.22.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Kubernetes"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Fabricio Voznika \u0026 Mark Wolters"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "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."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "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"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-20: Improper Input Validation"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s",
              "refsource": "MISC",
              "url": "https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s"
            },
            {
              "name": "https://github.com/kubernetes/kubernetes/issues/104980",
              "refsource": "MISC",
              "url": "https://github.com/kubernetes/kubernetes/issues/104980"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20211008-0006/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20211008-0006/"
            }
          ]
        },
        "source": {
          "defect": [
            "https://github.com/kubernetes/kubernetes/issues/104980"
          ],
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
    "assignerShortName": "kubernetes",
    "cveId": "CVE-2021-25741",
    "datePublished": "2021-09-20T17:05:21.097Z",
    "dateReserved": "2021-01-21T00:00:00.000Z",
    "dateUpdated": "2024-09-16T23:26:06.351Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-25741",
      "date": "2026-05-19",
      "epss": "0.33042",
      "percentile": "0.96957"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\", \"versionEndIncluding\": \"1.19.14\", \"matchCriteriaId\": \"294F8F39-19EC-48D3-8013-C35B7E3076B5\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.20.0\", \"versionEndIncluding\": \"1.20.10\", \"matchCriteriaId\": \"816775F6-5488-47BB-8080-DF5D12D14C69\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.21.0\", \"versionEndIncluding\": \"1.21.4\", \"matchCriteriaId\": \"A62C3A55-B83B-42E1-B6B1-E7395D2DB930\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.22.0\", \"versionEndIncluding\": \"1.22.1\", \"matchCriteriaId\": \"6683F913-E546-4C97-A5E7-09FB6FDB0D37\"}]}]}]",
      "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": "2024-11-21T05:55:19.723",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"jordan@liggitt.net\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.9}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N\", \"baseScore\": 8.1, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.2}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:S/C:P/I:P/A:N\", \"baseScore\": 5.5, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"SINGLE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 8.0, \"impactScore\": 4.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-09-20T17:15:08.343",
      "references": "[{\"url\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"source\": \"jordan@liggitt.net\", \"tags\": [\"Mitigation\", \"Third Party Advisory\"]}, {\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"source\": \"jordan@liggitt.net\", \"tags\": [\"Mailing List\", \"Mitigation\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"source\": \"jordan@liggitt.net\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mitigation\", \"Third Party Advisory\"]}, {\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Mitigation\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}]",
      "sourceIdentifier": "jordan@liggitt.net",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"jordan@liggitt.net\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-20\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-552\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-25741\",\"sourceIdentifier\":\"jordan@liggitt.net\",\"published\":\"2021-09-20T17:15:08.343\",\"lastModified\":\"2024-11-21T05:55:19.723\",\"vulnStatus\":\"Modified\",\"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\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":5.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:P/I:P/A:N\",\"baseScore\":5.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-552\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"1.19.14\",\"matchCriteriaId\":\"294F8F39-19EC-48D3-8013-C35B7E3076B5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.20.0\",\"versionEndIncluding\":\"1.20.10\",\"matchCriteriaId\":\"816775F6-5488-47BB-8080-DF5D12D14C69\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.21.0\",\"versionEndIncluding\":\"1.21.4\",\"matchCriteriaId\":\"A62C3A55-B83B-42E1-B6B1-E7395D2DB930\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.22.0\",\"versionEndIncluding\":\"1.22.1\",\"matchCriteriaId\":\"6683F913-E546-4C97-A5E7-09FB6FDB0D37\"}]}]}],\"references\":[{\"url\":\"https://github.com/kubernetes/kubernetes/issues/104980\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Mitigation\",\"Third Party Advisory\"]},{\"url\":\"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Mailing List\",\"Mitigation\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20211008-0006/\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/kubernetes/kubernetes/issues/104980\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mitigation\",\"Third Party Advisory\"]},{\"url\":\"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Mitigation\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20211008-0006/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T20:11:27.655Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-25741\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-20T13:25:58.469004Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\"], \"vendor\": \"kubernetes\", \"product\": \"kubernetes\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"1.19.14\"}, {\"status\": \"affected\", \"version\": \"1.20.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"1.20.10\"}, {\"status\": \"affected\", \"version\": \"1.21.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"1.21.4\"}, {\"status\": \"affected\", \"version\": \"1.22.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"1.22.1\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-20T13:37:35.562Z\"}}], \"cna\": {\"title\": \"Symlink Exchange Can Allow Host Filesystem Access\", \"source\": {\"defect\": [\"https://github.com/kubernetes/kubernetes/issues/104980\"], \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"value\": \"Fabricio Voznika \u0026 Mark Wolters\"}], \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"Kubernetes\", \"product\": \"Kubernetes\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"versionType\": \"custom\", \"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\"}]}], \"references\": [{\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"tags\": [\"x_refsource_CONFIRM\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-20\", \"description\": \"CWE-20: Improper Input Validation\"}]}], \"providerMetadata\": {\"orgId\": \"a6081bf6-c852-4425-ad4f-a67919267565\", \"shortName\": \"kubernetes\", \"dateUpdated\": \"2021-10-08T14:06:36.000Z\"}, \"x_legacyV4Record\": {\"credit\": [{\"lang\": \"eng\", \"value\": \"Fabricio Voznika \u0026 Mark Wolters\"}], \"impact\": {\"cvss\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, \"source\": {\"defect\": [\"https://github.com/kubernetes/kubernetes/issues/104980\"], \"discovery\": \"EXTERNAL\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"1.19.14\", \"version_affected\": \"\u003c=\"}, {\"version_value\": \"1.20.10\", \"version_affected\": \"\u003c=\"}, {\"version_value\": \"1.21.4\", \"version_affected\": \"\u003c=\"}, {\"version_value\": \"1.22.1\", \"version_affected\": \"\u003c=\"}]}, \"product_name\": \"Kubernetes\"}]}, \"vendor_name\": \"Kubernetes\"}]}}, \"data_type\": \"CVE\", \"generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"references\": {\"reference_data\": [{\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"name\": \"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s\", \"refsource\": \"MISC\"}, {\"url\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"name\": \"https://github.com/kubernetes/kubernetes/issues/104980\", \"refsource\": \"MISC\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"name\": \"https://security.netapp.com/advisory/ntap-20211008-0006/\", \"refsource\": \"CONFIRM\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"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.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-20: Improper Input Validation\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-25741\", \"STATE\": \"PUBLIC\", \"TITLE\": \"Symlink Exchange Can Allow Host Filesystem Access\", \"ASSIGNER\": \"security@kubernetes.io\", \"DATE_PUBLIC\": \"2021-09-15T121:15:00.000Z\"}}, \"x_ConverterErrors\": {\"DATE_PUBLIC\": {\"error\": \"v4 DATE_PUBLIC is invalid\", \"message\": \"hour must be in 0..23\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-25741\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-16T23:26:06.351Z\", \"dateReserved\": \"2021-01-21T00:00:00.000Z\", \"assignerOrgId\": \"a6081bf6-c852-4425-ad4f-a67919267565\", \"datePublished\": \"2021-09-20T17:05:21.097Z\", \"assignerShortName\": \"kubernetes\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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

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.