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"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"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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"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": {
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"ID": "CVE-2021-25737"
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"data_type": "CVE",
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},
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},
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},
{
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},
{
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"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211004-0004/"
}
]
}
},
"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- 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.