gsd-2020-8561
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.
Aliases
Aliases
CVE-2020-8561


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-8561",
    "description": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.",
    "id": "GSD-2020-8561",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-8561.html",
      "https://security.archlinux.org/CVE-2020-8561"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8561"
      ],
      "details": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.",
      "id": "GSD-2020-8561",
      "modified": "2023-12-13T01:21:54.003946Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@kubernetes.io",
        "DATE_PUBLIC": "2021-09-15T21:15:00.000Z",
        "ID": "CVE-2020-8561",
        "STATE": "PUBLIC",
        "TITLE": "Webhook redirect in kube-apiserver"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Kubernetes",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.20.11"
                        },
                        {
                          "version_affected": "\u003e?",
                          "version_value": "1.20.11"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.21.5"
                        },
                        {
                          "version_affected": "\u003e?",
                          "version_value": "1.21.5"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_value": "1.22.2"
                        },
                        {
                          "version_affected": "\u003e?",
                          "version_value": "1.22.2"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Kubernetes"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "QiQi Xu"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs."
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.1,
          "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:C/C:L/I:N/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-441 Unintended Proxy or Intermediary"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY",
            "refsource": "MISC",
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"
          },
          {
            "name": "https://github.com/kubernetes/kubernetes/issues/104720",
            "refsource": "MISC",
            "url": "https://github.com/kubernetes/kubernetes/issues/104720"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20211014-0002/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20211014-0002/"
          }
        ]
      },
      "source": {
        "defect": [
          "https://github.com/kubernetes/kubernetes/issues/104720"
        ],
        "discovery": "EXTERNAL"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c=1.22.2",
          "affected_versions": "All versions up to 1.22.2",
          "cvss_v2": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-610",
            "CWE-937"
          ],
          "date": "2021-10-04",
          "description": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.",
          "fixed_versions": [],
          "identifier": "CVE-2020-8561",
          "identifiers": [
            "GHSA-74j8-88mm-7496",
            "CVE-2020-8561"
          ],
          "not_impacted": "",
          "package_slug": "go/k8s.io/kubernetes",
          "pubdate": "2021-09-21",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Externally Controlled Reference to a Resource in Another Sphere",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-8561",
            "https://github.com/kubernetes/kubernetes/issues/104720",
            "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY",
            "https://github.com/advisories/GHSA-74j8-88mm-7496"
          ],
          "uuid": "5c6a9527-03df-4b2a-8ef7-94707b5f95b8"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:1.20.11:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:1.21.5:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:kubernetes:kubernetes:1.22.2:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security@kubernetes.io",
          "ID": "CVE-2020-8561"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-610"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "N/A",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Mitigation"
              ],
              "url": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"
            },
            {
              "name": "N/A",
              "refsource": "CONFIRM",
              "tags": [
                "Mitigation",
                "Third Party Advisory"
              ],
              "url": "https://github.com/kubernetes/kubernetes/issues/104720"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20211014-0002/",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.netapp.com/advisory/ntap-20211014-0002/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.3,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2021-11-06T03:04Z",
      "publishedDate": "2021-09-20T17:15Z"
    }
  }
}


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