GHSA-g42g-737j-qx6j

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Source
https://github.com/advisories/GHSA-g42g-737j-qx6j
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-g42g-737j-qx6j/GHSA-g42g-737j-qx6j.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-g42g-737j-qx6j
Aliases
Related
Published
2021-05-28T19:49:59Z
Modified
2024-08-21T15:58:32.616412Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
Summary
Access Restriction Bypass in kube-apiserver
Details

A vulnerability in Kubernetes kube-apiserver could allow node updates to bypass a Validating Admission Webhook and allow unauthorized node updates. The information that is provided to the admission controller could contain old configurations that overwrite values used for validation. Since the overwriting takes place before the validation, this could lead the admission controller to accept requests that should be blocked. The vulnerability can be exploited when an update action on node resources is performed and an admission controller is in place and configured to validate the action.

Users are only affected by this vulnerability if they are running a Validating Admission Webhook for Nodes that denies admission based partially on the old state of the Node object. It only impacts validating admission plugins that rely on old values in certain fields and does not impact calls from kubelets that go through the built-in NodeRestriction admission plugin.

Database specific 
{
    "nvd_published_at": "2021-09-06T12:15:00Z",
    "cwe_ids": [
        "CWE-284",
        "CWE-372",
        "CWE-863"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2022-03-22T18:25:38Z"
}
References

Affected packages

Go / k8s.io/kubernetes

Package

Name
k8s.io/kubernetes
View open source insights on deps.dev
Purl
pkg:golang/k8s.io/kubernetes

Affected ranges

Type
SEMVER
Events
Introduced
1.20.0
Fixed
1.20.6

Database specific 

{
    "last_known_affected_version_range": "<= 1.20.5"
}

Go / k8s.io/kubernetes

Package

Name
k8s.io/kubernetes
View open source insights on deps.dev
Purl
pkg:golang/k8s.io/kubernetes

Affected ranges

Type
SEMVER
Events
Introduced
1.19.0
Fixed
1.19.10

Database specific 

{
    "last_known_affected_version_range": "<= 1.19.9"
}

Go / k8s.io/kubernetes

Package

Name
k8s.io/kubernetes
View open source insights on deps.dev
Purl
pkg:golang/k8s.io/kubernetes

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.18.18

Database specific 

{
    "last_known_affected_version_range": "<= 1.18.17"
}