CVE-2023-48312

2023-11-2418:15:07

CWE-287

[email protected]

web.nvd.nist.gov

capsule-proxy

privilege escalation

vulnerability

kubernetes

api server

authentication

nvd

cve-2023-48312

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

26.2%

JSON

capsule-proxy is a reverse proxy for the capsule operator project. Affected versions are subject to a privilege escalation vulnerability which is based on a missing check if the user is authenticated based on the TokenReview result. All the clusters running with the anonymous-auth Kubernetes API Server setting disable (set to false) are affected since it would be possible to bypass the token review mechanism, interacting with the upper Kubernetes API Server. This privilege escalation cannot be exploited if you’re relying only on client certificates (SSL/TLS). This vulnerability has been addressed in version 0.4.6. Users are advised to upgrade.

Affected configurations

Vulners

NVD

Node

projectcapsulecapsule_proxyRange<0.4.6

CPENameOperatorVersion
clastix:capsule-proxyclastix capsule-proxyle0.4.5

CPE	Name	Operator	Version
clastix:capsule-proxy	clastix capsule-proxy	le	0.4.5

CNA Affected

[
  {
    "vendor": "projectcapsule",
    "product": "capsule-proxy",
    "versions": [
      {
        "version": "< 0.4.6",
        "status": "affected"
      }
    ]
  }
]