CVE-2023-20903
Cloud Foundry UAA Refresh Token Abuse/disable External Identity Provider
Description
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).
INFO
Published Date :
March 28, 2023, 9:15 p.m.
Last Modified :
April 6, 2023, 6:02 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-20903.
| URL | Resource |
|---|---|
| https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/ | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2023-20903 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-20903 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 06, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/ No Types Assigned https://www.cloudfoundry.org/blog/cve-2023-20903-tokens-for-inactivated-idps-are-not-revoked-and-remain-valid-until-expiration/ Vendor Advisory Added CWE NIST CWE-613 Added CPE Configuration OR *cpe:2.3:a:cloudfoundry:user_account_and_authentication:*:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-20903 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-20903
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.19101
percentile