GSD-2020-8561
Vulnerability from gsd - Updated: 2023-12-13 01:21Details
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
{
"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": {
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"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": {
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{
"product_name": "Kubernetes",
"version": {
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{
"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",
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"data_version": "4.0",
"description": {
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"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": {
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},
"impact": {
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"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"
}
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"value": "CWE-441 Unintended Proxy or Intermediary"
}
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}
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},
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{
"name": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY",
"refsource": "MISC",
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},
{
"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": {
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],
"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": {
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"nodes": [
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"cpe_match": [
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"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"
}
]
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"ID": "CVE-2020-8561"
},
"data_format": "MITRE",
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"description": {
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"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": {
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"value": "CWE-610"
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},
"references": {
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{
"name": "N/A",
"refsource": "MLIST",
"tags": [
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],
"url": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"
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"tags": [
"Third Party Advisory"
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"url": "https://security.netapp.com/advisory/ntap-20211014-0002/"
}
]
}
},
"impact": {
"baseMetricV2": {
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"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
},
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"scope": "CHANGED",
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},
"lastModifiedDate": "2021-11-06T03:04Z",
"publishedDate": "2021-09-20T17:15Z"
}
}
}
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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 |
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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