gsd-2021-25736
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Kube-proxy on Windows can unintentionally forward traffic to local processes listening on the same port (“spec.ports[*].port”) as a LoadBalancer Service when the LoadBalancer controller does not set the “status.loadBalancer.ingress[].ip” field. Clusters where the LoadBalancer controller sets the “status.loadBalancer.ingress[].ip” field are unaffected.
Aliases
Aliases
CVE-2021-25736


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-25736",
    "id": "GSD-2021-25736",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-25736.html",
      "https://access.redhat.com/errata/RHSA-2021:2130"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-25736"
      ],
      "details": "Kube-proxy\n on Windows can unintentionally forward traffic to local processes \nlistening on the same port (\u201cspec.ports[*].port\u201d) as a LoadBalancer \nService when the LoadBalancer controller\n does not set the \u201cstatus.loadBalancer.ingress[].ip\u201d field. Clusters \nwhere the LoadBalancer controller sets the \n\u201cstatus.loadBalancer.ingress[].ip\u201d field are unaffected.\n\n",
      "id": "GSD-2021-25736",
      "modified": "2023-12-13T01:23:21.156405Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@kubernetes.io",
        "ID": "CVE-2021-25736",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Kubernetes",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "0",
                          "version_value": "v1.20.5"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Kubernetes"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Eric Paris "
        },
        {
          "lang": "en",
          "value": "Christian Hernandez"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Kube-proxy\n on Windows can unintentionally forward traffic to local processes \nlistening on the same port (\u201cspec.ports[*].port\u201d) as a LoadBalancer \nService when the LoadBalancer controller\n does not set the \u201cstatus.loadBalancer.ingress[].ip\u201d field. Clusters \nwhere the LoadBalancer controller sets the \n\u201cstatus.loadBalancer.ingress[].ip\u201d field are unaffected.\n\n"
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.1.0-dev"
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/kubernetes/kubernetes/pull/99958",
            "refsource": "MISC",
            "url": "https://github.com/kubernetes/kubernetes/pull/99958"
          },
          {
            "name": "https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ",
            "refsource": "MISC",
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20231221-0003/",
            "refsource": "MISC",
            "url": "https://security.netapp.com/advisory/ntap-20231221-0003/"
          }
        ]
      },
      "solution": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThis issue has been fixed in the following versions:\u003cu\u003e\u003c/u\u003e\u003cu\u003e\u003c/u\u003e\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\nv1.21.0\u003cu\u003e\u003c/u\u003e\u003cu\u003e\u003c/u\u003e\u003c/li\u003e\u003cli\u003e\nv1.20.6\u003cu\u003e\u003c/u\u003e\u003cu\u003e\u003c/u\u003e\u003c/li\u003e\u003cli\u003e\nv1.19.10\u003cu\u003e\u003c/u\u003e\u003cu\u003e\u003c/u\u003e\u003c/li\u003e\u003cli\u003e\nv1.18.18\u003c/li\u003e\u003c/ul\u003e"
            }
          ],
          "value": "This issue has been fixed in the following versions:\n\n\n\n  *  \nv1.21.0\n  *  \nv1.20.6\n  *  \nv1.19.10\n  *  \nv1.18.18\n\n\n"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8E811D79-831A-493A-A0C8-D06442D01ADD",
                    "versionEndExcluding": "1.18.18",
                    "versionStartIncluding": "1.18.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "54F99BEF-703E-43C0-846C-AB9EECE134A9",
                    "versionEndExcluding": "1.19.10",
                    "versionStartIncluding": "1.19.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E26E82C1-754C-4E81-B7BC-FB4DACE33945",
                    "versionEndExcluding": "1.20.6",
                    "versionStartIncluding": "1.20.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "Kube-proxy\n on Windows can unintentionally forward traffic to local processes \nlistening on the same port (\u201cspec.ports[*].port\u201d) as a LoadBalancer \nService when the LoadBalancer controller\n does not set the \u201cstatus.loadBalancer.ingress[].ip\u201d field. Clusters \nwhere the LoadBalancer controller sets the \n\u201cstatus.loadBalancer.ingress[].ip\u201d field are unaffected.\n\n"
          },
          {
            "lang": "es",
            "value": "Kube-proxy en Windows puede reenviar tr\u00e1fico involuntariamente a procesos locales que escuchan en el mismo puerto (\u201cspec.ports[*].port\u201d) que LoadBalancer Service cuando el controlador LoadBalancer no configura \u201cstatus.loadBalancer.ingress[].ip\u201d. Los cl\u00fasteres donde el controlador LoadBalancer establece el campo \"status.loadBalancer.ingress[].ip\" no se ven afectados."
          }
        ],
        "id": "CVE-2021-25736",
        "lastModified": "2023-12-21T22:15:07.533",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 4.0,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.8,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "HIGH",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.3,
              "impactScore": 4.0,
              "source": "jordan@liggitt.net",
              "type": "Secondary"
            }
          ]
        },
        "published": "2023-10-30T03:15:07.653",
        "references": [
          {
            "source": "jordan@liggitt.net",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://github.com/kubernetes/kubernetes/pull/99958"
          },
          {
            "source": "jordan@liggitt.net",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ"
          },
          {
            "source": "jordan@liggitt.net",
            "url": "https://security.netapp.com/advisory/ntap-20231221-0003/"
          }
        ],
        "sourceIdentifier": "jordan@liggitt.net",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}


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