Fix container terminal security risk

Signed-off-by: hongming <talonwan@yunify.com>

pkg/apiserver/apiserver.go

@@ -229,7 +229,7 @@ func (s *APIServer) installKubeSphereAPIs() {
 		s.KubernetesClient.Master()))
 	urlruntime.Must(tenantv1alpha2.AddToContainer(s.container, s.InformerFactory, s.KubernetesClient.Kubernetes(),
 		s.KubernetesClient.KubeSphere(), s.EventsClient, s.LoggingClient, s.AuditingClient, amOperator, rbacAuthorizer, s.MonitoringClient, s.RuntimeCache, s.Config.MeteringOptions))
-	urlruntime.Must(terminalv1alpha2.AddToContainer(s.container, s.KubernetesClient.Kubernetes(), s.KubernetesClient.Config()))
+	urlruntime.Must(terminalv1alpha2.AddToContainer(s.container, s.KubernetesClient.Kubernetes(), rbacAuthorizer, s.KubernetesClient.Config()))
 	urlruntime.Must(clusterkapisv1alpha1.AddToContainer(s.container,
 		s.InformerFactory.KubernetesSharedInformerFactory(),
 		s.InformerFactory.KubeSphereSharedInformerFactory(),

pkg/kapis/terminal/v1alpha2/handler.go

@@ -17,8 +17,13 @@ limitations under the License.
 package v1alpha2
 
 import (
+	"errors"
 	"net/http"
 
+	"kubesphere.io/kubesphere/pkg/api"
+	"kubesphere.io/kubesphere/pkg/apiserver/authorization/authorizer"
+	requestctx "kubesphere.io/kubesphere/pkg/apiserver/request"
+
 	"github.com/emicklei/go-restful"
 	"github.com/gorilla/websocket"
 	"k8s.io/client-go/kubernetes"
@@ -37,9 +42,10 @@ var upgrader = websocket.Upgrader{
 
 type terminalHandler struct {
 	terminaler terminal.Interface
+	authorizer authorizer.Authorizer
 }
 
-func newTerminalHandler(client kubernetes.Interface, config *rest.Config) *terminalHandler {
+func newTerminalHandler(client kubernetes.Interface, authorizer authorizer.Authorizer, config *rest.Config) *terminalHandler {
 	return &terminalHandler{
 		terminaler: terminal.NewTerminaler(client, config),
 	}
@@ -51,6 +57,29 @@ func (t *terminalHandler) handleTerminalSession(request *restful.Request, respon
 	containerName := request.QueryParameter("container")
 	shell := request.QueryParameter("shell")
 
+	user, _ := requestctx.UserFrom(request.Request.Context())
+
+	createPodsExec := authorizer.AttributesRecord{
+		User:            user,
+		Verb:            "create",
+		Resource:        "pods",
+		Subresource:     "exec",
+		Namespace:       namespace,
+		ResourceRequest: true,
+		ResourceScope:   requestctx.NamespaceScope,
+	}
+
+	decision, reason, err := t.authorizer.Authorize(createPodsExec)
+	if err != nil {
+		api.HandleInternalError(response, request, err)
+		return
+	}
+
+	if decision != authorizer.DecisionAllow {
+		api.HandleForbidden(response, request, errors.New(reason))
+		return
+	}
+
 	conn, err := upgrader.Upgrade(response.ResponseWriter, request.Request, nil)
 	if err != nil {
 		klog.Warning(err)

pkg/kapis/terminal/v1alpha2/register.go

@@ -23,6 +23,8 @@ import (
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 
+	"kubesphere.io/kubesphere/pkg/apiserver/authorization/authorizer"
+
 	"kubesphere.io/kubesphere/pkg/apiserver/runtime"
 	"kubesphere.io/kubesphere/pkg/constants"
 	"kubesphere.io/kubesphere/pkg/models"
@@ -34,11 +36,11 @@ const (
 
 var GroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1alpha2"}
 
-func AddToContainer(c *restful.Container, client kubernetes.Interface, config *rest.Config) error {
+func AddToContainer(c *restful.Container, client kubernetes.Interface, authorizer authorizer.Authorizer, config *rest.Config) error {
 
 	webservice := runtime.NewWebService(GroupVersion)
 
-	handler := newTerminalHandler(client, config)
+	handler := newTerminalHandler(client, authorizer, config)
 
 	webservice.Route(webservice.GET("/namespaces/{namespace}/pods/{pod}/exec").
 		To(handler.handleTerminalSession).

tools/cmd/doc-gen/main.go

@@ -132,7 +132,7 @@ func generateSwaggerJson() []byte {
 	urlruntime.Must(resourcesv1alpha2.AddToContainer(container, clientsets.Kubernetes(), informerFactory, ""))
 	urlruntime.Must(resourcesv1alpha3.AddToContainer(container, informerFactory, nil))
 	urlruntime.Must(tenantv1alpha2.AddToContainer(container, informerFactory, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil))
-	urlruntime.Must(terminalv1alpha2.AddToContainer(container, clientsets.Kubernetes(), nil))
+	urlruntime.Must(terminalv1alpha2.AddToContainer(container, clientsets.Kubernetes(), nil, nil))
 	urlruntime.Must(metricsv1alpha2.AddToContainer(container))
 	urlruntime.Must(networkv1alpha2.AddToContainer(container, ""))
 	alertingOptions := &alerting.Options{}