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kube-apiserver authentication bypass vulnerability

High severity GitHub Reviewed Published Sep 24, 2023 to the GitHub Advisory Database • Updated May 3, 2024

Package

gomod github.com/openshift/apiserver-library-go (Go)

Affected versions

< 0.0.0-20230621

Patched versions

0.0.0-20230621

Description

An authentication bypass vulnerability was discovered in kube-apiserver. This issue could allow a remote, authenticated attacker who has been given permissions "update, patch" the "pods/ephemeralcontainers" subresource beyond what the default is. They would then need to create a new pod or patch one that they already have access to. This might allow evasion of SCC admission restrictions, thereby gaining control of a privileged pod.

References

Published by the National Vulnerability Database Sep 24, 2023
Published to the GitHub Advisory Database Sep 24, 2023
Reviewed Sep 25, 2023
Last updated May 3, 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
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
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:H/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS score

1.156%
(85th percentile)

Weaknesses

CVE ID

CVE-2023-1260

GHSA ID

GHSA-92hx-3mh6-hc49

Source code

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