Affected: Bitnami: pinniped

An Insufficient Session Expiration issue was discovered in the Pinniped Supervisor (before v0.19.0). A user authenticating to Kubernetes clusters via the Pinniped Supervisor could potentially use their access token to continue their session beyond what proper use of their refresh token might allow.

An Insufficient Session Expiration issue was discovered in the Pinniped Supervisor (before v0.19.0). A user authenticating to Kubernetes clusters via the Pinniped Supervisor could potentially use their access token to continue their session beyond what proper use of their refresh token might allow.

Affected: Go: go.pinniped.dev

### Impact

A user authenticating to Kubernetes clusters via the Pinniped Supervisor could potentially use their access token to continue their session beyond what proper use of their refresh token might allow.

Access tokens issued by the Pinniped Supervisor have an intended expiration lifetime of approximately two minutes. The Pinniped CLI will automatically use the refresh token, which has a lifetime of approximately nine hours, to request a new access token after the access token's advertised expiration time elapses. Starting in Pinniped version 0.13.0, the Supervisor performs checks during each refresh request against the configured external identity provider to determine if the user should be allowed to continue their session. Thus, the short lifetime of the access token is intended to force users to be subjected to those checks often. For example, if a user's account in the external identity provider became locked, the next refresh would fail, and the user should lose access to the Kubernetes clusters fairly quickly. As another example, if a user's group membership changed in the external identity provider, the new group memberships would be reflected in their sessions with Kubernetes clusters within a fairly short window of time.

Access tokens are cached in a local file by the Pinniped CLI (the kubectl plugin) and are sent back to the Supervisor (via HTTPS) to receive cluster-scoped credentials. Due to a bug in this token exchange, the expiration time of the submitt…