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Confused Deputy in Kubernetes

Low severity GitHub Reviewed Published Sep 21, 2021 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

gomod k8s.io/kubernetes (Go)

Affected versions

<= 1.22.2

Patched versions

None

Description

A security issue was discovered with Kubernetes that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.

References

Published by the National Vulnerability Database Sep 20, 2021
Reviewed Sep 21, 2021
Published to the GitHub Advisory Database Sep 21, 2021
Last updated Feb 1, 2023

Severity

Low

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.077%
(34th percentile)

Weaknesses

CVE ID

CVE-2021-25740

GHSA ID

GHSA-vw47-mr44-3jf9

Source code

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