What is the severity of CVE-2021-4314?

CVE-2021-4314 is considered a critical vulnerability due to the risk of unauthorized access.

How do I fix CVE-2021-4314?

To fix CVE-2021-4314, you must apply the APAR PH12143 to your zOSMF installation.

Which versions are affected by CVE-2021-4314?

CVE-2021-4314 affects versions 1.16 to 1.19 of the Zowe API Mediation Layer.

What are the implications of CVE-2021-4314?

The implications of CVE-2021-4314 include the potential for attackers to authenticate as any user without a valid JWT token.

Is there a public exploit for CVE-2021-4314?

As of now, there is no confirmed public exploit available for CVE-2021-4314.

Vulnerability/
CVE-2021-4314

medium

5.3

CWE

287 269

18/1/2023

19/12/2024

CVE-2021-4314

First published: Wed Jan 18 2023(Updated: )

It is possible to manipulate the JWT token without the knowledge of the JWT secret and authenticate without valid JWT token as any user. This is happening only in the situation when zOSMF doesn’t have the APAR PH12143 applied. This issue affects: 1.16 versions to 1.19. What happens is that the services using the ZAAS client or the API ML API to query will be deceived into believing the information in the JWT token is valid when it isn’t. It’s possible to use this to persuade the southbound service that different user is authenticated.

Credit: zowe-security@lists.openmainframeproject.org zowe-security@lists.openmainframeproject.org

Affected Software	Affected Version	How to fix
Linuxfoundation Zowe Api Mediation Layer	>=1.16<=1.19
Linuxfoundation Zowe Api Mediation Layer	>=1.16.0<1.19.0

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Reference Links

https://github.com/zowe/api-layer/

Frequently Asked Questions

What is the severity of CVE-2021-4314?
CVE-2021-4314 is considered a critical vulnerability due to the risk of unauthorized access.
How do I fix CVE-2021-4314?
To fix CVE-2021-4314, you must apply the APAR PH12143 to your zOSMF installation.
Which versions are affected by CVE-2021-4314?
CVE-2021-4314 affects versions 1.16 to 1.19 of the Zowe API Mediation Layer.
What are the implications of CVE-2021-4314?
The implications of CVE-2021-4314 include the potential for attackers to authenticate as any user without a valid JWT token.
Is there a public exploit for CVE-2021-4314?
As of now, there is no confirmed public exploit available for CVE-2021-4314.

collector/nvd-index
agent/weakness
agent/type
collector/mitre-cve
source/MITRE
agent/severity
agent/references
agent/event
agent/description
agent/first-publish-date
collector/nvd-api
source/NVD
agent/software-canonical-lookup
agent/author
agent/last-modified-date
agent/softwarecombine
agent/tags
agent/source
vendor/linuxfoundation
canonical/linuxfoundation zowe api mediation layer
version/linuxfoundation zowe api mediation layer/1.16
version/linuxfoundation zowe api mediation layer/1.19
version/linuxfoundation zowe api mediation layer/1.16.0

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Frequently Asked Questions

What is the severity of CVE-2021-4314?
CVE-2021-4314 is considered a critical vulnerability due to the risk of unauthorized access.
How do I fix CVE-2021-4314?
To fix CVE-2021-4314, you must apply the APAR PH12143 to your zOSMF installation.
Which versions are affected by CVE-2021-4314?
CVE-2021-4314 affects versions 1.16 to 1.19 of the Zowe API Mediation Layer.
What are the implications of CVE-2021-4314?
The implications of CVE-2021-4314 include the potential for attackers to authenticate as any user without a valid JWT token.
Is there a public exploit for CVE-2021-4314?
As of now, there is no confirmed public exploit available for CVE-2021-4314.