Keylime: keylime: authentication bypass allows unauthorized administrative operations due to missing client-side tls authentication
A flaw was found in Keylime. The Keylime registrar, since version 7.12.0, does not enforce client-side Transport Layer Security (TLS) authentication. This authentication bypass vulnerability allows unauthenticated clients with network access to perform administrative operations, including listing agents, retrieving public Trusted Platform Module (TPM) data, and deleting agents, by connecting without presenting a client certificate.
Restrict network access to the Keylime registrar's HTTPS port (default 8891) to only trusted verifier and tenant hosts using firewall rules.
Alternatively, deploy a reverse proxy (e.g., Nginx, HAProxy) in front of the registrar to enforce client certificate authentication.
Ensure any changes to firewall rules or proxy configurations are reloaded or services are restarted for the mitigation to take effect.