If an OpenID Connect provider supports the "none" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the "idtoken" response type which is not secure and violates the OpenID Core Specification. The "none" algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using "none" as the value of "alg" key in the header with an empty signature value.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2022-01-06T12:52:04
Updated: 2024-08-04T04:32:13.070Z
Reserved: 2021-12-13T00:00:00
Link: CVE-2021-44878
Vulnrichment
No data.
NVD
Status : Analyzed
Published: 2022-01-06T13:15:08.180
Modified: 2022-05-13T15:51:59.780
Link: CVE-2021-44878
Redhat
No data.