How does CVE-2023-20903 affect Cloudfoundry User Account And Authentication?

It affects Cloudfoundry User Account And Authentication by allowing tokens for inactivated identity providers to remain valid until expiration.

What is the severity of CVE-2023-20903?

The severity of CVE-2023-20903 is medium with a CVSS score of 4.3.

How can I fix CVE-2023-20903?

To fix CVE-2023-20903, it is recommended to apply the latest patch or update provided by the vendor.

Where can I find more information about CVE-2023-20903?

You can find more information about CVE-2023-20903 on the Cloudfoundry website at: https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/

Vulnerability/
CVE-2023-20903

medium

4.3

CWE

613

28/3/2023

2/8/2024

CVE-2023-20903

First published: Tue Mar 28 2023(Updated: )

This disclosure regards a vulnerability related to UAA refresh tokens and external identity providers.Assuming that an external identity provider is linked to the UAA, a refresh token is issued to a client on behalf of a user from that identity provider, the administrator of the UAA deactivates the identity provider from the UAA. It is expected that the UAA would reject a refresh token during a refresh token grant, but it does not (hence the vulnerability). It will continue to issue access tokens to request presenting such refresh tokens, as if the identity provider was still active. As a result, clients with refresh tokens issued through the deactivated identity provider would still have access to Cloud Foundry resources until their refresh token expires (which defaults to 30 days).

Credit: security@vmware.com

Affected Software	Affected Version	How to fix
Cloudfoundry User Account And Authentication

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Reference Links

https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/

Frequently Asked Questions

What is CVE-2023-20903?
CVE-2023-20903 is a vulnerability related to UAA refresh tokens and external identity providers.
How does CVE-2023-20903 affect Cloudfoundry User Account And Authentication?
It affects Cloudfoundry User Account And Authentication by allowing tokens for inactivated identity providers to remain valid until expiration.
What is the severity of CVE-2023-20903?
The severity of CVE-2023-20903 is medium with a CVSS score of 4.3.
How can I fix CVE-2023-20903?
To fix CVE-2023-20903, it is recommended to apply the latest patch or update provided by the vendor.
Where can I find more information about CVE-2023-20903?
You can find more information about CVE-2023-20903 on the Cloudfoundry website at: https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/

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