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CVE-2021-25735
Good to know:

Date: September 6, 2021
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.
Language: Go
Severity Score
Related Resources (12)
Severity Score
Weakness Type (CWE)
Top Fix

Upgrade Version
Upgrade to version k8s.io/kubernetes - v1.20.6;k8s.io/kubernetes - v1.19.10;k8s.io/kubernetes - v1.18.18
CVSS v3.1
Base Score: |
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Attack Vector (AV): | NETWORK |
Attack Complexity (AC): | LOW |
Privileges Required (PR): | HIGH |
User Interaction (UI): | NONE |
Scope (S): | UNCHANGED |
Confidentiality (C): | NONE |
Integrity (I): | HIGH |
Availability (A): | HIGH |
CVSS v2
Base Score: |
|
---|---|
Access Vector (AV): | NETWORK |
Access Complexity (AC): | LOW |
Authentication (AU): | SINGLE |
Confidentiality (C): | NONE |
Integrity (I): | PARTIAL |
Availability (A): | PARTIAL |
Additional information: |