Update Helm to v3.6.1

v3.6.1 is a a security update from Helm, ensuring that credentials are
always only passed to the defined repository host.

Based on Helm user reports, disabling this behavior may be required for
some Helm repository solutions like Artifactory, and may be done by
setting `PassCredentials` in the `HelmRepositorySpec`.

For more information, see:
https://github.com/helm/helm/security/advisories/GHSA-56hp-xqp3-w2jf

Signed-off-by: Hidde Beydals <hello@hidde.co>

api/v1beta1/helmrepository_types.go

@@ -45,6 +45,15 @@ type HelmRepositorySpec struct {
 	// +optional
 	SecretRef *meta.LocalObjectReference `json:"secretRef,omitempty"`
 
+	// PassCredentials allows the credentials from the SecretRef to be passed on to
+	// a host that does not match the host as defined in URL.
+	// This may be required if the host of the advertised chart URLs in the index
+	// differ from the defined URL.
+	// Enabling this should be done with caution, as it can potentially result in
+	// credentials getting stolen in a MITM-attack.
+	// +optional
+	PassCredentials bool `json:"passCredentials,omitempty"`
+
 	// The interval at which to check the upstream for updates.
 	// +required
 	Interval metav1.Duration `json:"interval"`

config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml

@@ -50,6 +50,9 @@ spec:
               interval:
                 description: The interval at which to check the upstream for updates.
                 type: string
+              passCredentials:
+                description: PassCredentials allows the credentials from the SecretRef to be passed on to a host that does not match the host as defined in URL. This may be required if the host of the advertised chart URLs in the index differ from the defined URL. Enabling this should be done with caution, as it can potentially result in credentials getting stolen in a MITM-attack.
+                type: boolean
               secretRef:
                 description: The name of the secret containing authentication credentials for the Helm repository. For HTTP/S basic auth the secret must contain username and password fields. For TLS the secret must contain a certFile and keyFile, and/or caCert fields.
                 properties:

controllers/helmchart_controller.go

@@ -301,7 +301,11 @@ func (r *HelmChartReconciler) getSource(ctx context.Context, chart sourcev1.Helm
 func (r *HelmChartReconciler) reconcileFromHelmRepository(ctx context.Context,
 	repository sourcev1.HelmRepository, chart sourcev1.HelmChart, force bool) (sourcev1.HelmChart, error) {
 	// Configure ChartRepository getter options
-	var clientOpts []getter.Option
+	clientOpts := []getter.Option{
+		getter.WithURL(repository.Spec.URL),
+		getter.WithTimeout(repository.Spec.Timeout.Duration),
+		getter.WithPassCredentialsAll(repository.Spec.PassCredentials),
+	}
 	if secret, err := r.getHelmRepositorySecret(ctx, &repository); err != nil {
 		return sourcev1.HelmChartNotReady(chart, sourcev1.AuthenticationFailedReason, err.Error()), err
 	} else if secret != nil {
@@ -311,10 +315,8 @@ func (r *HelmChartReconciler) reconcileFromHelmRepository(ctx context.Context,
 			return sourcev1.HelmChartNotReady(chart, sourcev1.AuthenticationFailedReason, err.Error()), err
 		}
 		defer cleanup()
-
+		clientOpts = append(clientOpts, opts...)
-		clientOpts = opts
 	}
-	clientOpts = append(clientOpts, getter.WithTimeout(repository.Spec.Timeout.Duration))
 
 	// Initialize the chart repository and load the index file
 	chartRepo, err := helm.NewChartRepository(repository.Spec.URL, r.Getters, clientOpts)
@@ -619,13 +621,18 @@ func (r *HelmChartReconciler) reconcileFromTarballArtifact(ctx context.Context,
 			if err != nil {
 				repository = &sourcev1.HelmRepository{
 					Spec: sourcev1.HelmRepositorySpec{
-						URL: dep.Repository,
+						URL:     dep.Repository,
+						Timeout: &metav1.Duration{Duration: 60 * time.Second},
 					},
 				}
 			}
 
 			// Configure ChartRepository getter options
-			var clientOpts []getter.Option
+			clientOpts := []getter.Option{
+				getter.WithURL(repository.Spec.URL),
+				getter.WithTimeout(repository.Spec.Timeout.Duration),
+				getter.WithPassCredentialsAll(repository.Spec.PassCredentials),
+			}
 			if secret, err := r.getHelmRepositorySecret(ctx, repository); err != nil {
 				return sourcev1.HelmChartNotReady(chart, sourcev1.AuthenticationFailedReason, err.Error()), err
 			} else if secret != nil {
@@ -635,8 +642,7 @@ func (r *HelmChartReconciler) reconcileFromTarballArtifact(ctx context.Context,
 					return sourcev1.HelmChartNotReady(chart, sourcev1.AuthenticationFailedReason, err.Error()), err
 				}
 				defer cleanup()
-
+				clientOpts = append(clientOpts, opts...)
-				clientOpts = opts
 			}
 
 			// Initialize the chart repository and load the index file

controllers/helmchart_controller_test.go

@@ -1015,9 +1015,9 @@ var _ = Describe("HelmChartReconciler", func() {
 					Name:      secretKey.Name,
 					Namespace: secretKey.Namespace,
 				},
-				Data: map[string][]byte{
+				StringData: map[string]string{
-					"username": []byte(username),
+					"username": username,
-					"password": []byte(password),
+					"password": password,
 				},
 			}
 			Expect(k8sClient.Create(context.Background(), secret)).Should(Succeed())

controllers/helmrepository_controller.go

@@ -171,7 +171,11 @@ func (r *HelmRepositoryReconciler) Reconcile(ctx context.Context, req ctrl.Reque
 }
 
 func (r *HelmRepositoryReconciler) reconcile(ctx context.Context, repository sourcev1.HelmRepository) (sourcev1.HelmRepository, error) {
-	var clientOpts []getter.Option
+	clientOpts := []getter.Option{
+		getter.WithURL(repository.Spec.URL),
+		getter.WithTimeout(repository.Spec.Timeout.Duration),
+		getter.WithPassCredentialsAll(repository.Spec.PassCredentials),
+	}
 	if repository.Spec.SecretRef != nil {
 		name := types.NamespacedName{
 			Namespace: repository.GetNamespace(),
@@ -191,9 +195,8 @@ func (r *HelmRepositoryReconciler) reconcile(ctx context.Context, repository sou
 			return sourcev1.HelmRepositoryNotReady(repository, sourcev1.AuthenticationFailedReason, err.Error()), err
 		}
 		defer cleanup()
-		clientOpts = opts
+		clientOpts = append(clientOpts, opts...)
 	}
-	clientOpts = append(clientOpts, getter.WithTimeout(repository.Spec.Timeout.Duration))
 
 	chartRepo, err := helm.NewChartRepository(repository.Spec.URL, r.Getters, clientOpts)
 	if err != nil {

docs/api/source.md

@@ -703,6 +703,23 @@ caCert fields.</p>
 </tr>
 <tr>
 <td>
+<code>passCredentials</code><br>
+<em>
+bool
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>PassCredentials allows the credentials from the SecretRef to be passed on to
+a host that does not match the host as defined in URL.
+This may be required if the host of the advertised chart URLs in the index
+differ from the defined URL.
+Enabling this should be done with caution, as it can potentially result in
+credentials getting stolen in a MITM-attack.</p>
+</td>
+</tr>
+<tr>
+<td>
 <code>interval</code><br>
 <em>
 <a href="https://godoc.org/k8s.io/apimachinery/pkg/apis/meta/v1#Duration">
@@ -1777,6 +1794,23 @@ caCert fields.</p>
 </tr>
 <tr>
 <td>
+<code>passCredentials</code><br>
+<em>
+bool
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>PassCredentials allows the credentials from the SecretRef to be passed on to
+a host that does not match the host as defined in URL.
+This may be required if the host of the advertised chart URLs in the index
+differ from the defined URL.
+Enabling this should be done with caution, as it can potentially result in
+credentials getting stolen in a MITM-attack.</p>
+</td>
+</tr>
+<tr>
+<td>
 <code>interval</code><br>
 <em>
 <a href="https://godoc.org/k8s.io/apimachinery/pkg/apis/meta/v1#Duration">

docs/spec/v1beta1/helmrepositories.md

@@ -21,9 +21,18 @@ type HelmRepositorySpec struct {
 	// password fields.
 	// For TLS the secret must contain a certFile and keyFile, and/or
 	// caCert fields.
-    // +optional
+	// +optional
 	SecretRef *corev1.LocalObjectReference `json:"secretRef,omitempty"`
 
+	// PassCredentials allows the credentials from the SecretRef to be passed on to
+	// a host that does not match the host as defined in URL.
+	// This may be required if the host of the advertised chart URLs in the index
+	// differ from the defined URL.
+	// Enabling this should be done with caution, as it can potentially result in
+	// credentials getting stolen in a MITM-attack.
+	// +optional
+	PassCredentials bool `json:"passCredentials,omitempty"`
+
 	// The interval at which to check the upstream for updates.
 	// +required
 	Interval metav1.Duration `json:"interval"`

go.mod

@@ -29,7 +29,7 @@ require (
 	golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
 	gotest.tools v2.2.0+incompatible
-	helm.sh/helm/v3 v3.6.0
+	helm.sh/helm/v3 v3.6.1
 	k8s.io/api v0.21.1
 	k8s.io/apimachinery v0.21.1
 	k8s.io/client-go v0.21.1

go.sum

@@ -1247,8 +1247,9 @@ gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 gotest.tools/v3 v3.0.3 h1:4AuOwCGf4lLR9u3YOe2awrHygurzhO/HeQ6laiA6Sx0=
 gotest.tools/v3 v3.0.3/go.mod h1:Z7Lb0S5l+klDB31fvDQX8ss/FlKDxtlFlw3Oa8Ymbl8=
-helm.sh/helm/v3 v3.6.0 h1:/9IMxJ2lXJHbvTMHcW1AO71lXQHqDC+3bcpGp7yCsb8=
 helm.sh/helm/v3 v3.6.0/go.mod h1:mIIus8EOqj+obtycw3sidsR4ORr2aFDmXMSI3k+oeVY=
+helm.sh/helm/v3 v3.6.1 h1:TQ6q4pAatXr7qh2fbLcb0oNd0I3J7kv26oo5cExKTtc=
+helm.sh/helm/v3 v3.6.1/go.mod h1:mIIus8EOqj+obtycw3sidsR4ORr2aFDmXMSI3k+oeVY=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=