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Improper Limitation of a Pathname to a Restricted Directory in Fabric8 Kubernetes Client

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

maven io.fabric8:kubernetes-client (Maven)

Affected versions

>= 4.2.0, <= 4.7.1
>= 4.8.0, <= 4.11.1
>= 4.12.0, <= 4.13.1
>= 5.0.0, <= 5.0.1

Patched versions

4.7.2
4.11.2
4.13.2
5.0.2

Description

A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. This flaw allows a malicious pod/container to cause applications using the fabric8 kubernetes-client copy command to extract files outside the working path. The highest threat from this vulnerability is to integrity and system availability. This has been fixed in kubernetes-client-4.13.2 kubernetes-client-5.0.2 kubernetes-client-4.11.2 kubernetes-client-4.7.2

References

Published by the National Vulnerability Database Mar 16, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jun 22, 2022
Last updated Jan 27, 2023

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
None
User interaction
None
Scope
Unchanged
Confidentiality
None
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:N/UI:N/S:U/C:N/I:H/A:H

EPSS score

0.096%
(42nd percentile)

Weaknesses

CVE ID

CVE-2021-20218

GHSA ID

GHSA-jwh2-ffg4-48xc

Source code

No known source code
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