CVE-2023-2728 Bypassing enforce mountable secrets policy imposed by the ServiceAccount admission plugin

2023-07-0320:06:11

CWE-20

kubernetes

www.cve.org

cve-2023-2728

mountable secrets

serviceaccount admission plugin

ephemeral containers

kubernetes clusters

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

45.1%

JSON

Users may be able to launch containers that bypass the mountable secrets policy enforced by the ServiceAccount admission plugin when using ephemeral containers. The policy ensures pods running with a service account may only reference secrets specified in the service account’s secrets field. Kubernetes clusters are only affected if the ServiceAccount admission plugin and the kubernetes.io/enforce-mountable-secrets annotation are used together with ephemeral containers.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Kubernetes",
    "vendor": "Kubernetes",
    "versions": [
      {
        "lessThanOrEqual": "<=",
        "status": "affected",
        "version": "v1.24.14",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "v1.25.0 - v1.25.10"
      },
      {
        "status": "affected",
        "version": "v1.26.0 - v1.26.5"
      },
      {
        "status": "affected",
        "version": "v1.27.0 - v1.27.2"
      }
    ]
  }
]