* Fixes issue where if the audit log is enabled and anonymous authentication is disabled, then an unauthenticated user request will cause a panic and crash the `kube-apiserver`. ([#38717](https://github.com/kubernetes/kubernetes/pull/38717), [@deads2k](https://github.com/deads2k))

## Known Issues for v1.5.1

## Changes to API Resources
### ABAC
* ABAC policies using `"user":"*"` or `"group":"*"` to match all users or groups will only match authenticated requests. To match unauthenticated requests, ABAC policies must explicitly specify `"group":"system:unauthenticated"` ([#38968](https://github.com/kubernetes/kubernetes/pull/38968), [@liggitt](https://github.com/liggitt))

### Admission Control

- Fix a bug in cronjob controller...

- The default delegating authorization options now allow unauthenticated access to healthz, readyz, and livez.  A system:masters user connecting to an authz delegator will not perform an authz check. ([#98325](https://github.com/kubernetes/kubernetes/pull/98325), [@deads2k](https://github.com/deads2k)) [SIG API Machinery,...

* kubeadm: kubelets in kubeadm clusters now disable the readonly port (10255). If you're relying on unauthenticated access to the readonly port, please switch to using the secure port (10250). Instead, you can now use ServiceAccount tokens when talking to the secure port, which will make it easier to get access to, for example, the `/metrics` endpoint of the...

    /**
    * Specifies that communication across the authenticated channel
    * should carry a digital signature (message integrity).
    */
    public static final int NTLMSSP_NEGOTIATE_SIGN = 0x00000010;

    /**
    * Specifies that communication across the authenticated channel
    * should be encrypted (message confidentiality).
    */

    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}


def test_incorrect_token():
    response = client.get("/items", headers={"Authorization": "Non-existent testtoken"})
    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}


def test_token():

    return client


@needs_py39
def test_no_token(client: TestClient):
    response = client.get("/items")
    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}
    assert response.headers["WWW-Authenticate"] == "Bearer"


@needs_py39
def test_token(client: TestClient):
    response = client.get("/items", headers={"Authorization": "Bearer testtoken"})

    /**
     * Specifies that communication across the authenticated channel
     * should carry a digital signature (message integrity).
     */
    public static final int NTLMSSP_NEGOTIATE_SIGN = 0x00000010;

    /**
     * Specifies that communication across the authenticated channel
     * should be encrypted (message confidentiality).
     */

  // +optional
  repeated string audiences = 2;
}

// TokenReviewStatus is the result of the token authentication request.
message TokenReviewStatus {
  // Authenticated indicates that the token was associated with a known user.
  // +optional
  optional bool authenticated = 1;

  // User is the UserInfo associated with the provided token.
  // +optional
  optional UserInfo user = 2;