154 lines
6.2 KiB
JSON
154 lines
6.2 KiB
JSON
{
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"containers": {
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"cna": {
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"affected": [
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{
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"product": "Kubernetes",
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"vendor": "Kubernetes",
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"versions": [
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{
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"lessThan": "*",
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"status": "affected",
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"version": "0",
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"versionType": "semver"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Javier Provecho"
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}
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],
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"datePublic": "2021-05-04T00:00:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"value": "As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 2.2,
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"baseSeverity": "LOW",
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"confidentialityImpact": "LOW",
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"integrityImpact": "NONE",
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"privilegesRequired": "HIGH",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N",
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"version": "3.1"
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-367",
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"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
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"shortName": "kubernetes",
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"dateUpdated": "2026-06-01T21:45:40.339Z"
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},
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"references": [
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{
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"
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},
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{
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/kubernetes/kubernetes/issues/101493"
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},
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{
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY"
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},
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{
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://security.netapp.com/advisory/ntap-20220225-0002/"
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}
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],
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"source": {
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"defect": [
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"https://github.com/kubernetes/kubernetes/issues/101493"
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],
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"discovery": "EXTERNAL"
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},
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"title": "Bypass of Kubernetes API Server proxy TOCTOU",
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"workarounds": [
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{
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"lang": "en",
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"value": "If this issue affects your clusters’ control planes, you can use dnsmasq for name resolution and configure the min-cache-ttl and neg-ttl parameters to a low non-zero value to enforce cached replies for proxied connections"
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}
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],
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"x_generator": {
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"engine": "Vulnogram 0.0.9"
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}
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},
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"adp": [
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T10:03:46.172Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"tags": [
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"x_refsource_MISC",
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"x_transferred"
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],
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"url": "https://github.com/kubernetes/kubernetes/issues/101493"
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},
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{
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"tags": [
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"x_refsource_MISC",
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"x_transferred"
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],
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"url": "https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY"
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},
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{
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"tags": [
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"x_refsource_CONFIRM",
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"x_transferred"
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],
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"url": "https://security.netapp.com/advisory/ntap-20220225-0002/"
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}
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]
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}
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]
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},
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"cveMetadata": {
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"assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
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"assignerShortName": "kubernetes",
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"cveId": "CVE-2020-8562",
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"datePublished": "2022-02-01T10:33:00.317Z",
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"dateReserved": "2020-02-03T00:00:00.000Z",
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"dateUpdated": "2026-06-01T21:45:40.339Z",
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"state": "PUBLISHED"
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},
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2"
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} |