CVE-2022-0759

2022-03-2500:00:00

ubuntu.com

flaw

kubeclient

parsing

kubeconfig files

man-in-the-middle attacks (mitm)

ruby applications

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

44.1%

JSON

A flaw was found in all versions of kubeclient up to (but not including)
v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed
kubeconfig files. When the kubeconfig file does not configure custom CA to
verify certs, kubeclient ends up accepting any certificate (it wrongly
returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse
kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchruby-kubeclient< anyUNKNOWN
ubuntu20.04noarchruby-kubeclient< anyUNKNOWN
ubuntu22.04noarchruby-kubeclient< anyUNKNOWN
ubuntu24.04noarchruby-kubeclient< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	ruby-kubeclient	< any	UNKNOWN
ubuntu	20.04	noarch	ruby-kubeclient	< any	UNKNOWN
ubuntu	22.04	noarch	ruby-kubeclient	< any	UNKNOWN
ubuntu	24.04	noarch	ruby-kubeclient	< any	UNKNOWN