kube-apiserver authentication bypass vulnerability

2023-09-2403:30:20

Google

osv.dev

kubernetes

authentication bypass

vulnerability

pod manipulation

privilege escalation

unauthorized access

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.2

Confidence

Low

EPSS

0.004

Percentile

72.8%

JSON

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.