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Kubernetes Nil pointer dereference in KCM after v1 HPA patch request

High severity GitHub Reviewed Published Nov 17, 2024 to the GitHub Advisory Database • Updated Nov 19, 2024

Package

gomod k8s.io/kubernetes (Go)

Affected versions

< 1.27.0-alpha.1

Patched versions

1.27.0-alpha.1

Description

A flaw was found in kube-controller-manager. This issue occurs when the initial application of a HPA config YAML lacking a .spec.behavior.scaleUp block causes a denial of service due to KCM pods going into restart churn.

References

Published by the National Vulnerability Database Nov 17, 2024
Published to the GitHub Advisory Database Nov 17, 2024
Reviewed Nov 18, 2024
Last updated Nov 19, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS score

0.119%
(47th percentile)

Weaknesses

CVE ID

CVE-2024-0793

GHSA ID

GHSA-h7wq-jj8r-qm7p

Source code

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