gsd-2021-25737
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Aliases
Aliases



{
  "GSD": {
    "alias": "CVE-2021-25737",
    "description": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.",
    "id": "GSD-2021-25737",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-25737.html",
      "https://access.redhat.com/errata/RHSA-2021:2437",
      "https://security.archlinux.org/CVE-2021-25737"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-25737"
      ],
      "details": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.",
      "id": "GSD-2021-25737",
      "modified": "2023-12-13T01:23:21.288965Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@kubernetes.io",
        "DATE_PUBLIC": "2021-05-18T19:00:00.000Z",
        "ID": "CVE-2021-25737",
        "STATE": "PUBLIC",
        "TITLE": "Holes in EndpointSlice Validation Enable Host Network Hijack"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Kubernetes",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.18.18"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.19.10"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.20.6"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.21.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Kubernetes"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "John Howard"
        }
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      "data_version": "4.0",
      "description": {
        "description_data": [
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            "lang": "eng",
            "value": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs."
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 2.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-184 Incomplete Blacklist"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY",
            "refsource": "MISC",
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY"
          },
          {
            "name": "https://github.com/kubernetes/kubernetes/issues/102106",
            "refsource": "MISC",
            "url": "https://github.com/kubernetes/kubernetes/issues/102106"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20211004-0004/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20211004-0004/"
          }
        ]
      },
      "source": {
        "defect": [
          "https://github.com/kubernetes/kubernetes/issues/102106"
        ],
        "discovery": "EXTERNAL"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=v1.16.0 \u003cv1.18.19 || \u003e=v1.19.0 \u003cv1.19.10 || \u003e=v1.20.0 \u003cv1.20.7 || =v1.21.0",
          "affected_versions": "All versions starting from 1.16.0 before 1.18.19, all versions starting from 1.19.0 before 1.19.10, all versions starting from 1.20.0 before 1.20.7, version 1.21.0",
          "cvss_v2": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2021-10-07",
          "description": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.",
          "fixed_versions": [
            "v0.15.7"
          ],
          "identifier": "CVE-2021-25737",
          "identifiers": [
            "CVE-2021-25737"
          ],
          "not_impacted": "All versions before 1.16.0, all versions starting from 1.18.19 before 1.19.0, all versions starting from 1.19.10 before 1.20.0, all versions starting from 1.20.7 before 1.21.0, all versions after 1.21.0",
          "package_slug": "go/github.com/kubernetes/client-go",
          "pubdate": "2021-09-06",
          "solution": "Upgrade to version 0.15.7 or above.",
          "title": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-25737"
          ],
          "uuid": "51c1c43c-d89e-4066-a782-5ed2f88d473f",
          "versions": [
            {
              "commit": {
                "sha": "0c0e6362aeebd04afefc2153f3718dd66b598033",
                "tags": [
                  "kubernetes-1.16.0"
                ],
                "timestamp": "20190918160344"
              },
              "number": "v1.16.0"
            },
            {
              "commit": {
                "sha": "0216c485e7897a33495d312552d6760c5f7d7f39",
                "tags": [
                  "v0.15.7"
                ],
                "timestamp": "20191211191335"
              },
              "number": "v0.15.7"
            },
            {
              "commit": {
                "sha": "7f00db86ac5edb9c3aa20f182a41e3a6479ccbbc",
                "tags": [
                  "kubernetes-1.19.0"
                ],
                "timestamp": "20200826212433"
              },
              "number": "v1.19.0"
            },
            {
              "commit": {
                "sha": "f51fa15f3df1a2101544e829a4eaa247c20e95fb",
                "tags": [
                  "kubernetes-1.20.0"
                ],
                "timestamp": "20201208210624"
              },
              "number": "v1.20.0"
            },
            {
              "commit": {
                "sha": "786f7a4a4a2335e9e6e70eae1c0b2efe62e92e03",
                "tags": [
                  "kubernetes-1.21.0"
                ],
                "timestamp": "20210408192749"
              },
              "number": "v1.21.0"
            },
            {
              "commit": {
                "sha": "3a2fdbb08c7f92155cb426b24c36a476dcc39ed0",
                "tags": [
                  "kubernetes-1.19.10"
                ],
                "timestamp": "20210415080238"
              },
              "number": "v1.19.10"
            },
            {
              "commit": {
                "sha": "54ab2aa147d32af9ea5b935d34325333f5ecb401",
                "tags": [
                  "kubernetes-1.18.19"
                ],
                "timestamp": "20210518104424"
              },
              "number": "v1.18.19"
            },
            {
              "commit": {
                "sha": "2f46a0d924d59d7061d04541d8c45ecd0de0998d",
                "tags": [
                  "kubernetes-1.20.7"
                ],
                "timestamp": "20210518105815"
              },
              "number": "v1.20.7"
            }
          ]
        },
        {
          "affected_range": "\u003e=1.16.0 \u003c1.18.19||\u003e=1.19.0 \u003c1.19.11||\u003e=1.20.0 \u003c1.20.7||=1.21.0",
          "affected_versions": "All versions starting from 1.16.0 before 1.18.19, all versions starting from 1.19.0 before 1.19.11, all versions starting from 1.20.0 before 1.20.7, version 1.21.0",
          "cvss_v2": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-601",
            "CWE-937"
          ],
          "date": "2021-10-05",
          "description": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.",
          "fixed_versions": [
            "1.18.19",
            "1.19.11",
            "1.20.7",
            "1.21.1"
          ],
          "identifier": "CVE-2021-25737",
          "identifiers": [
            "GHSA-mfv7-gq43-w965",
            "CVE-2021-25737"
          ],
          "not_impacted": "All versions before 1.16.0, all versions starting from 1.18.19 before 1.19.0, all versions starting from 1.19.11 before 1.20.0, all versions starting from 1.20.7 before 1.21.0, all versions after 1.21.0",
          "package_slug": "go/k8s.io/kubernetes",
          "pubdate": "2021-09-07",
          "solution": "Upgrade to versions 1.18.19, 1.19.11, 1.20.7, 1.21.1 or above.",
          "title": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-25737",
            "https://github.com/kubernetes/kubernetes/issues/102106",
            "https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY",
            "https://security.netapp.com/advisory/ntap-20211004-0004/",
            "https://github.com/advisories/GHSA-mfv7-gq43-w965"
          ],
          "uuid": "e9528d59-f45a-4193-bb4f-81450e89f00d"
        },
        {
          "affected_range": "\u003e=1.16.0 \u003c1.18.19||\u003e=1.19.0 \u003c1.19.10||\u003e=1.20.0 \u003c1.20.7||\u003e=1.21.0 \u003c1.21.1",
          "affected_versions": "All versions starting from 1.16.0 before 1.18.19, all versions starting from 1.19.0 before 1.19.10, all versions starting from 1.20.0 before 1.20.7, all versions starting from version 1.21.0 before 1.21.1",
          "cvss_v2": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2021-10-07",
          "description": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.",
          "fixed_versions": [
            "1.18.19",
            "1.19.10",
            "1.20.7",
            "1.21.1"
          ],
          "identifier": "CVE-2021-25737",
          "identifiers": [
            "CVE-2021-25737"
          ],
          "not_impacted": "All versions starting from 1.18.19 before 1.19.0, all versions starting from 1.19.10 before 1.20.0, all versions starting from 1.20.7 before 1.21.0, all versions starting from 1.21.1",
          "package_slug": "go/k8s.io/kubernetes/pkg/apis/apps/validation",
          "pubdate": "2021-09-06",
          "solution": "Upgrade to version 1.18.19, 1.19.10, 1.20.7, 1.21.1 or above.",
          "title": "URL Redirection to Untrusted Site (Open Redirect)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-25737"
          ],
          "uuid": "d5497e02-a36f-408d-aa1b-96b93abc5a5c"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.18.19",
                "versionStartIncluding": "1.16.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.19.10",
                "versionStartIncluding": "1.19.0",
                "vulnerable": true
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              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.20.7",
                "versionStartIncluding": "1.20.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:1.21.0:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security@kubernetes.io",
          "ID": "CVE-2021-25737"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
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              "lang": "en",
              "value": "A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
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                  "value": "CWE-601"
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        },
        "references": {
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              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
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            },
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              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20211004-0004/",
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                "Third Party Advisory"
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              "url": "https://security.netapp.com/advisory/ntap-20211004-0004/"
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 6.8,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 1.7,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2021-10-07T17:55Z",
      "publishedDate": "2021-09-06T12:15Z"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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