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Kubernetes client-go vulnerable to Sensitive Information Leak via Log File

Moderate severity GitHub Reviewed Published Feb 6, 2023 to the GitHub Advisory Database • Updated May 20, 2024

Package

gomod k8s.io/client-go (Go)

Affected versions

>= 0.19.0, < 0.19.6
>= 0.20.0-alpha.0, < 0.20.0-alpha.2
>= 0.18.0, < 0.18.14
< 0.17.16

Patched versions

0.19.6
0.20.0-alpha.2
0.18.14
0.17.16
gomod k8s.io/kubernetes (Go)
< 1.20.0-alpha.2
1.20.0-alpha.2

Description

In Kubernetes, if the logging level is set to at least 9, authorization and bearer tokens will be written to log files. This can occur both in API server logs and client tool output like kubectl. This affects <= v1.19.5, <= v1.18.13, <= v1.17.15, < v1.20.0-alpha2.

References

Published to the GitHub Advisory Database Feb 6, 2023
Reviewed Feb 6, 2023
Last updated May 20, 2024

Severity

Moderate

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
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
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:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.044%
(14th percentile)

Weaknesses

CVE ID

CVE-2020-8565

GHSA ID

GHSA-8cfg-vx93-jvxw

Source code

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