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
{ "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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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.