Description
pac4j-oidc before 6.5.6 fails to verify access token signatures, issuers, audiences, or expiry when extracting Keycloak realm and client roles. Attackers can forge access tokens with administrative roles paired with valid ID tokens to bypass authorization checks in applications relying on pac4j role validation.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
pac4j pac4j
Default version status: unaffected
0 to < 6.5.6affected
pkg:maven/org.pac4j/pac4j-parentReferences
- https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e ↗
- https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html ↗
- https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-oidc/src/main/java/org/pac4j/oidc/authorization/generator/KeycloakRolesAuthorizationGenerator.java ↗
- https://github.com/pac4j/pac4j ↗
- https://www.vulncheck.com/advisories/pac4j-oidc-before-6.5.6-privilege-escalation-via-unverified-keycloak-access-token ↗