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GHSA-4f53-xh3v-g8x4

Keycloak secondary factor bypass in step-up authentication

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-3597

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-services < 22.0.10 22.0.10
Maven org.keycloak:keycloak-services >= 23.0.0, < 24.0.3 24.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

Keycloak does not correctly validate its client step-up authentication. A password-authed attacker could use this flaw to register a false second auth factor, alongside the existing one, to a targeted account. The second factor then permits step-up authentication.

References

External links from the advisory. They lead to third-party sites.