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cve[email protected]CVE-2021-25735
HistorySep 06, 2021 - 12:15 p.m.

CVE-2021-25735

2021-09-0612:15:00
NVD-CWE-Other
[email protected]
web.nvd.nist.gov
78
cve-2021-25735
kube-apiserver
security issue
validating admission webhook
nvd
vulnerability

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

6.4 Medium

AI Score

Confidence

High

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:P/A:P

0.001 Low

EPSS

Percentile

28.8%

JSON

A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.

Related

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Design/Logic Flaw
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Input Validation Bypass
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Security Bulletin: A vulnerability in Kubernetes kube-apiserver may affect IBM Robotic Process Automation for Cloud Pak and result in a bypass of security restrictions (CVE-2021-25735).
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Security Bulletin: Red Hat OpenShift on IBM Cloud is affected by a Kubernetes API server security vulnerability (CVE-2021-25735)
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Security Bulletin: IBM Cloud Kubernetes Service is affected by a Kubernetes API server security vulnerability (CVE-2021-25735)
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Access Restriction Bypass in kube-apiserver
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RHEL 7 / 8 : OpenShift Container Platform 4.8.2 packages and (RHSA-2021:2437)
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(RHSA-2021:2437) Moderate: OpenShift Container Platform 4.8.2 packages and security update
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(RHSA-2022:6133) Important: OpenShift Container Platform 4.10.30 bug fix and security update
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6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

6.4 Medium

AI Score

Confidence

High

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:P/A:P

0.001 Low

EPSS

Percentile

28.8%

JSON
Related for CVE-2021-25735
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