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prionPRIOn knowledge basePRION:CVE-2023-20903
HistoryMar 28, 2023 - 9:15 p.m.

Design/Logic Flaw

2023-03-2821:15:00
PRIOn knowledge base
www.prio-n.com
4
uaa
refresh tokens
identity provider
vulnerability
access tokens
deactivation

4.5 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

21.1%

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).

4.5 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

21.1%

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