CVE-2020-8565

Incomplete fix for CVE-2019-11250 allows for token leak in logs when logLevel >= 9

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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 <= v1.19.3, <= v1.18.10, <= v1.17.13, < v1.20.0-alpha2.

En Kubernetes, si el nivel de registro se establece en al menos 9, los tokens de autorización y portador se escribirán en los archivos de registro. Esto puede ocurrir tanto en los registros del servidor API como en la salida de la herramienta cliente como kubectl. Esto afecta a versiones anteriores e iguales a v1.19.3, versiones anteriores e iguales a v1.18.10, versiones anteriores e iguales a v1.17.13, versiones anteriores a v1.20.0-alpha2

A flaw was found in kubernetes. In Kubernetes, if the logging level is 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`. Previously, CVE-2019-11250 was assigned for the same issue for logging levels of at least 4.

*Credits: Patrick Rhomberg (purelyapplied)

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-03 CVE Reserved
2020-12-07 CVE Published
2023-03-08 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-117: Improper Output Neutralization for Logs
CWE-532: Insertion of Sensitive Information into Log File

CAPEC

References (4)

URL	Tag	Source
https://github.com/kubernetes/kubernetes/issues/95623	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ	2020-12-08

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-8565	2021-12-13
https://bugzilla.redhat.com/show_bug.cgi?id=1886638	2021-12-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.17.0 <= 1.17.13 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.17.0 <= 1.17.13"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.18.0 <= 1.18.10 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.18.0 <= 1.18.10"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.19.0 <= 1.19.3 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.19.0 <= 1.19.3"		-		Affected