Bump version to 2.3.4

Signed-off-by: jannfis <jann@mistrust.net>

Co-authored-by: Michael Crenshaw <michael@crenshaw.dev>

Co-authored-by: Michael Crenshaw <michael@crenshaw.dev>

.github/workflows/ci-build.yaml

@@ -12,7 +12,7 @@ on:
 
 env:
   # Golang version to use across CI steps
-  GOLANG_VERSION: '1.17.6'
+  GOLANG_VERSION: '1.17'
 
 jobs:
   check-go:

.github/workflows/image.yaml

@@ -10,7 +10,7 @@ on:
     types: [ labeled, unlabeled, opened, synchronize, reopened ]
 
 env:
-  GOLANG_VERSION: '1.17.6'
+  GOLANG_VERSION: '1.17'
 
 jobs:
   publish:

.github/workflows/release.yaml

@@ -12,7 +12,7 @@ on:
       - '!release-v0*'
 
 env:
-    GOLANG_VERSION: '1.17.6'
+    GOLANG_VERSION: '1.17'
 
 jobs:
   prepare-release:

Dockerfile

@@ -4,7 +4,7 @@ ARG BASE_IMAGE=docker.io/library/ubuntu:21.10
 # Initial stage which pulls prepares build dependencies and CLI tooling we need for our final image
 # Also used as the image in CI jobs so needs all dependencies
 ####################################################################################################
-FROM docker.io/library/golang:1.17.6 as builder
+FROM docker.io/library/golang:1.17 as builder
 
 RUN echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list
 
@@ -102,7 +102,7 @@ RUN HOST_ARCH='amd64' NODE_ENV='production' NODE_ONLINE_ENV='online' NODE_OPTION
 ####################################################################################################
 # Argo CD Build stage which performs the actual build of Argo CD binaries
 ####################################################################################################
-FROM docker.io/library/golang:1.17.6 as argocd-build
+FROM docker.io/library/golang:1.17 as argocd-build
 
 WORKDIR /go/src/github.com/argoproj/argo-cd
 

VERSION

@@ -1 +1 @@
-2.3.3
+2.3.4

docs/requirements.txt

@@ -1,4 +1,5 @@
 mkdocs==1.2.3
 mkdocs-material==7.1.7
 markdown_include==0.6.0
-pygments==2.7.4
+pygments==2.7.4
+jinja2===3.0.3

manifests/base/kustomization.yaml

@@ -5,7 +5,7 @@ kind: Kustomization
 images:
 - name: quay.io/argoproj/argocd
   newName: quay.io/argoproj/argocd
-  newTag: v2.3.3
+  newTag: v2.3.4
 resources:
 - ./application-controller
 - ./dex

manifests/core-install.yaml

@@ -9692,7 +9692,7 @@ spec:
           value: /helm-working-dir
         - name: HELM_DATA_HOME
           value: /helm-working-dir
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           failureThreshold: 3
@@ -9741,7 +9741,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /var/run/argocd/argocd-cmp-server
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         name: copyutil
         volumeMounts:
         - mountPath: /var/run/argocd
@@ -9906,7 +9906,7 @@ spec:
               key: controller.default.cache.expiration
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:

manifests/core-install/kustomization.yaml

@@ -11,4 +11,4 @@ resources:
 images:
 - name: quay.io/argoproj/argocd
   newName: quay.io/argoproj/argocd
-  newTag: v2.3.3
+  newTag: v2.3.4

manifests/ha/base/kustomization.yaml

@@ -11,7 +11,7 @@ patchesStrategicMerge:
 images:
 - name: quay.io/argoproj/argocd
   newName: quay.io/argoproj/argocd
-  newTag: v2.3.3
+  newTag: v2.3.4
 resources:
 - ../../base/application-controller
 - ../../base/dex

manifests/ha/install.yaml

@@ -10516,7 +10516,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /shared/argocd-dex
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         name: copyutil
         volumeMounts:
@@ -10549,7 +10549,7 @@ spec:
       containers:
       - command:
         - argocd-notifications
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           tcpSocket:
@@ -10782,7 +10782,7 @@ spec:
           value: /helm-working-dir
         - name: HELM_DATA_HOME
           value: /helm-working-dir
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           failureThreshold: 3
@@ -10831,7 +10831,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /var/run/argocd/argocd-cmp-server
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         name: copyutil
         volumeMounts:
         - mountPath: /var/run/argocd
@@ -11058,7 +11058,7 @@ spec:
               key: server.http.cookie.maxnumber
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:
@@ -11254,7 +11254,7 @@ spec:
               key: controller.default.cache.expiration
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:

manifests/ha/namespace-install.yaml

@@ -7812,7 +7812,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /shared/argocd-dex
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         name: copyutil
         volumeMounts:
@@ -7845,7 +7845,7 @@ spec:
       containers:
       - command:
         - argocd-notifications
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           tcpSocket:
@@ -8078,7 +8078,7 @@ spec:
           value: /helm-working-dir
         - name: HELM_DATA_HOME
           value: /helm-working-dir
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           failureThreshold: 3
@@ -8127,7 +8127,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /var/run/argocd/argocd-cmp-server
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         name: copyutil
         volumeMounts:
         - mountPath: /var/run/argocd
@@ -8354,7 +8354,7 @@ spec:
               key: server.http.cookie.maxnumber
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:
@@ -8550,7 +8550,7 @@ spec:
               key: controller.default.cache.expiration
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:

manifests/install.yaml

@@ -9886,7 +9886,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /shared/argocd-dex
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         name: copyutil
         volumeMounts:
@@ -9919,7 +9919,7 @@ spec:
       containers:
       - command:
         - argocd-notifications
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           tcpSocket:
@@ -10116,7 +10116,7 @@ spec:
           value: /helm-working-dir
         - name: HELM_DATA_HOME
           value: /helm-working-dir
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           failureThreshold: 3
@@ -10165,7 +10165,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /var/run/argocd/argocd-cmp-server
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         name: copyutil
         volumeMounts:
         - mountPath: /var/run/argocd
@@ -10388,7 +10388,7 @@ spec:
               key: server.http.cookie.maxnumber
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:
@@ -10578,7 +10578,7 @@ spec:
               key: controller.default.cache.expiration
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:

manifests/namespace-install.yaml

@@ -7182,7 +7182,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /shared/argocd-dex
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         name: copyutil
         volumeMounts:
@@ -7215,7 +7215,7 @@ spec:
       containers:
       - command:
         - argocd-notifications
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           tcpSocket:
@@ -7412,7 +7412,7 @@ spec:
           value: /helm-working-dir
         - name: HELM_DATA_HOME
           value: /helm-working-dir
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           failureThreshold: 3
@@ -7461,7 +7461,7 @@ spec:
         - -n
         - /usr/local/bin/argocd
         - /var/run/argocd/argocd-cmp-server
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         name: copyutil
         volumeMounts:
         - mountPath: /var/run/argocd
@@ -7684,7 +7684,7 @@ spec:
               key: server.http.cookie.maxnumber
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:
@@ -7874,7 +7874,7 @@ spec:
               key: controller.default.cache.expiration
               name: argocd-cmd-params-cm
               optional: true
-        image: quay.io/argoproj/argocd:v2.3.3
+        image: quay.io/argoproj/argocd:v2.3.4
         imagePullPolicy: Always
         livenessProbe:
           httpGet:

pkg/apis/application/v1alpha1/cluster_constants.go

@@ -48,17 +48,17 @@ var (
 	K8sMaxIdleConnections = env.ParseNumFromEnv(EnvK8sClientMaxIdleConnections, 500, 0, math.MaxInt32)
 
 	// K8sTLSHandshakeTimeout defines the maximum duration to wait for a TLS handshake to complete
-	K8sTLSHandshakeTimeout = env.ParseDurationFromEnv(EnvK8sTLSHandshakeTimeout, 10*time.Second, 0, math.MaxInt32)
+	K8sTLSHandshakeTimeout = env.ParseDurationFromEnv(EnvK8sTLSHandshakeTimeout, 10*time.Second, 0, math.MaxInt32*time.Second)
 
 	// K8sTCPTimeout defines the TCP timeout to use when performing K8s API requests
-	K8sTCPTimeout = env.ParseDurationFromEnv(EnvK8sTCPTimeout, 30*time.Second, 0, math.MaxInt32)
+	K8sTCPTimeout = env.ParseDurationFromEnv(EnvK8sTCPTimeout, 30*time.Second, 0, math.MaxInt32*time.Second)
 
 	// K8sTCPKeepAlive defines the interval for sending TCP keep alive to K8s API server
-	K8sTCPKeepAlive = env.ParseDurationFromEnv(EnvK8sTCPKeepAlive, 30*time.Second, 0, math.MaxInt32)
+	K8sTCPKeepAlive = env.ParseDurationFromEnv(EnvK8sTCPKeepAlive, 30*time.Second, 0, math.MaxInt32*time.Second)
 
 	// K8sTCPIdleConnTimeout defines the duration for keeping idle TCP connections to the K8s API server
-	K8sTCPIdleConnTimeout = env.ParseDurationFromEnv(EnvK8sTCPIdleConnTimeout, 5*time.Minute, 0, math.MaxInt32)
+	K8sTCPIdleConnTimeout = env.ParseDurationFromEnv(EnvK8sTCPIdleConnTimeout, 5*time.Minute, 0, math.MaxInt32*time.Second)
 
 	// K8sServerSideTimeout defines which server side timeout to send with each API request
-	K8sServerSideTimeout = env.ParseDurationFromEnv(EnvK8sTCPTimeout, 32*time.Second, 0, math.MaxInt32)
+	K8sServerSideTimeout = env.ParseDurationFromEnv(EnvK8sTCPTimeout, 0, 0, math.MaxInt32*time.Second)
 )

reposerver/repository/repository.go

@@ -18,6 +18,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/argoproj/argo-cd/v2/util/io/files"
+
 	"github.com/Masterminds/semver/v3"
 	"github.com/TomOnTime/utfutil"
 	"github.com/argoproj/gitops-engine/pkg/utils/kube"
@@ -810,7 +812,8 @@ func GenerateManifests(ctx context.Context, appPath, repoRoot, revision string,
 		if directory = q.ApplicationSource.Directory; directory == nil {
 			directory = &v1alpha1.ApplicationSourceDirectory{}
 		}
-		targetObjs, err = findManifests(appPath, repoRoot, env, *directory, q.EnabledSourceTypes)
+		logCtx := log.WithField("application", q.AppName)
+		targetObjs, err = findManifests(logCtx, appPath, repoRoot, env, *directory, q.EnabledSourceTypes)
 	}
 	if err != nil {
 		return nil, err
@@ -1012,12 +1015,32 @@ func ksShow(appLabelKey, appPath string, ksonnetOpts *v1alpha1.ApplicationSource
 var manifestFile = regexp.MustCompile(`^.*\.(yaml|yml|json|jsonnet)$`)
 
 // findManifests looks at all yaml files in a directory and unmarshals them into a list of unstructured objects
-func findManifests(appPath string, repoRoot string, env *v1alpha1.Env, directory v1alpha1.ApplicationSourceDirectory, enabledManifestGeneration map[string]bool) ([]*unstructured.Unstructured, error) {
+func findManifests(logCtx *log.Entry, appPath string, repoRoot string, env *v1alpha1.Env, directory v1alpha1.ApplicationSourceDirectory, enabledManifestGeneration map[string]bool) ([]*unstructured.Unstructured, error) {
 	var objs []*unstructured.Unstructured
 	err := filepath.Walk(appPath, func(path string, f os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
+		relPath, err := filepath.Rel(appPath, path)
+		if err != nil {
+			return fmt.Errorf("failed to get relative path of symlink: %w", err)
+		}
+		if files.IsSymlink(f) {
+			realPath, err := filepath.EvalSymlinks(path)
+			if err != nil {
+				logCtx.Debugf("error checking symlink realpath: %s", err)
+				if os.IsNotExist(err) {
+					log.Warnf("ignoring out-of-bounds symlink at %q: %s", relPath, err)
+					return nil
+				} else {
+					return fmt.Errorf("failed to evaluate symlink at %q: %w", relPath, err)
+				}
+			}
+			if !files.Inbound(realPath, appPath) {
+				logCtx.Warnf("illegal filepath in symlink: %s", realPath)
+				return fmt.Errorf("illegal filepath in symlink at %q", relPath)
+			}
+		}
 		if f.IsDir() {
 			if path != appPath && !directory.Recurse {
 				return filepath.SkipDir
@@ -1030,10 +1053,6 @@ func findManifests(appPath string, repoRoot string, env *v1alpha1.Env, directory
 			return nil
 		}
 
-		relPath, err := filepath.Rel(appPath, path)
-		if err != nil {
-			return err
-		}
 		if directory.Exclude != "" && glob.Match(directory.Exclude, relPath) {
 			return nil
 		}

reposerver/repository/repository_test.go

@@ -16,6 +16,8 @@ import (
 	"testing"
 	"time"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/ghodss/yaml"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
@@ -149,6 +151,76 @@ func TestGenerateYamlManifestInDir(t *testing.T) {
 	assert.Equal(t, 3, len(res2.Manifests))
 }
 
+func Test_GenerateManifests_NoOutOfBoundsAccess(t *testing.T) {
+	testCases := []struct {
+		name                    string
+		outOfBoundsFilename     string
+		outOfBoundsFileContents string
+		mustNotContain          string // Optional string that must not appear in error or manifest output. If empty, use outOfBoundsFileContents.
+	}{
+		{
+			name:                    "out of bounds JSON file should not appear in error output",
+			outOfBoundsFilename:     "test.json",
+			outOfBoundsFileContents: `{"some": "json"}`,
+		},
+		{
+			name:                    "malformed JSON file contents should not appear in error output",
+			outOfBoundsFilename:     "test.json",
+			outOfBoundsFileContents: "$",
+		},
+		{
+			name:                "out of bounds JSON manifest should not appear in manifest output",
+			outOfBoundsFilename: "test.json",
+			// JSON marshalling is deterministic. So if there's a leak, exactly this should appear in the manifests.
+			outOfBoundsFileContents: `{"apiVersion":"v1","kind":"Secret","metadata":{"name":"test","namespace":"default"},"type":"Opaque"}`,
+		},
+		{
+			name:                    "out of bounds YAML manifest should not appear in manifest output",
+			outOfBoundsFilename:     "test.yaml",
+			outOfBoundsFileContents: "apiVersion: v1\nkind: Secret\nmetadata:\n  name: test\n  namespace: default\ntype: Opaque",
+			mustNotContain:          `{"apiVersion":"v1","kind":"Secret","metadata":{"name":"test","namespace":"default"},"type":"Opaque"}`,
+		},
+	}
+
+	for _, testCase := range testCases {
+		testCaseCopy := testCase
+		t.Run(testCaseCopy.name, func(t *testing.T) {
+			t.Parallel()
+
+			outOfBoundsDir := t.TempDir()
+			outOfBoundsFile := path.Join(outOfBoundsDir, testCaseCopy.outOfBoundsFilename)
+			err := os.WriteFile(outOfBoundsFile, []byte(testCaseCopy.outOfBoundsFileContents), os.FileMode(0444))
+			require.NoError(t, err)
+
+			repoDir := t.TempDir()
+			err = os.Symlink(outOfBoundsFile, path.Join(repoDir, testCaseCopy.outOfBoundsFilename))
+			require.NoError(t, err)
+
+			var mustNotContain = testCaseCopy.outOfBoundsFileContents
+			if testCaseCopy.mustNotContain != "" {
+				mustNotContain = testCaseCopy.mustNotContain
+			}
+
+			q := apiclient.ManifestRequest{Repo: &argoappv1.Repository{}, ApplicationSource: &argoappv1.ApplicationSource{}}
+			res, err := GenerateManifests(context.Background(), repoDir, "", "", &q, false, &git.NoopCredsStore{})
+			require.Error(t, err)
+			assert.NotContains(t, err.Error(), mustNotContain)
+			assert.Contains(t, err.Error(), "illegal filepath")
+			assert.Nil(t, res)
+		})
+	}
+}
+
+func TestGenerateManifests_MissingSymlinkDestination(t *testing.T) {
+	repoDir := t.TempDir()
+	err := os.Symlink("/obviously/does/not/exist", path.Join(repoDir, "test.yaml"))
+	require.NoError(t, err)
+
+	q := apiclient.ManifestRequest{Repo: &argoappv1.Repository{}, ApplicationSource: &argoappv1.ApplicationSource{}}
+	_, err = GenerateManifests(context.Background(), repoDir, "", "", &q, false, &git.NoopCredsStore{})
+	require.NoError(t, err)
+}
+
 func TestGenerateManifests_K8SAPIResetCache(t *testing.T) {
 	service := newService("../..")
 
@@ -1641,7 +1713,7 @@ func TestFindResources(t *testing.T) {
 	for i := range testCases {
 		tc := testCases[i]
 		t.Run(tc.name, func(t *testing.T) {
-			objs, err := findManifests("testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
+			objs, err := findManifests(&log.Entry{}, "testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
 				Recurse: true,
 				Include: tc.include,
 				Exclude: tc.exclude,
@@ -1659,7 +1731,7 @@ func TestFindResources(t *testing.T) {
 }
 
 func TestFindManifests_Exclude(t *testing.T) {
-	objs, err := findManifests("testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
+	objs, err := findManifests(&log.Entry{}, "testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
 		Recurse: true,
 		Exclude: "subdir/deploymentSub.yaml",
 	}, map[string]bool{})
@@ -1672,7 +1744,7 @@ func TestFindManifests_Exclude(t *testing.T) {
 }
 
 func TestFindManifests_Exclude_NothingMatches(t *testing.T) {
-	objs, err := findManifests("testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
+	objs, err := findManifests(&log.Entry{}, "testdata/app-include-exclude", ".", nil, argoappv1.ApplicationSourceDirectory{
 		Recurse: true,
 		Exclude: "nothing.yaml",
 	}, map[string]bool{})

server/server.go

@@ -951,6 +951,8 @@ func (a *ArgoCDServer) Authenticate(ctx context.Context) (context.Context, error
 		}
 		if !argoCDSettings.AnonymousUserEnabled {
 			return ctx, claimsErr
+		} else {
+			ctx = context.WithValue(ctx, "claims", "")
 		}
 	}
 

server/server_test.go

@@ -3,6 +3,8 @@ package server
 import (
 	"context"
 	"fmt"
+	"io"
+	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
@@ -12,6 +14,7 @@ import (
 	"github.com/golang-jwt/jwt/v4"
 	log "github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc/metadata"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes/fake"
@@ -432,6 +435,386 @@ func TestAuthenticate(t *testing.T) {
 	}
 }
 
+func dexMockHandler(t *testing.T, url string) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		switch r.RequestURI {
+		case "/api/dex/.well-known/openid-configuration":
+			_, err := io.WriteString(w, fmt.Sprintf(`
+{
+  "issuer": "%[1]s/api/dex",
+  "authorization_endpoint": "%[1]s/api/dex/auth",
+  "token_endpoint": "%[1]s/api/dex/token",
+  "jwks_uri": "%[1]s/api/dex/keys",
+  "userinfo_endpoint": "%[1]s/api/dex/userinfo",
+  "device_authorization_endpoint": "%[1]s/api/dex/device/code",
+  "grant_types_supported": [
+    "authorization_code",
+    "refresh_token",
+    "urn:ietf:params:oauth:grant-type:device_code"
+  ],
+  "response_types_supported": [
+    "code"
+  ],
+  "subject_types_supported": [
+    "public"
+  ],
+  "id_token_signing_alg_values_supported": [
+    "RS256", "HS256"
+  ],
+  "code_challenge_methods_supported": [
+    "S256",
+    "plain"
+  ],
+  "scopes_supported": [
+    "openid",
+    "email",
+    "groups",
+    "profile",
+    "offline_access"
+  ],
+  "token_endpoint_auth_methods_supported": [
+    "client_secret_basic",
+    "client_secret_post"
+  ],
+  "claims_supported": [
+    "iss",
+    "sub",
+    "aud",
+    "iat",
+    "exp",
+    "email",
+    "email_verified",
+    "locale",
+    "name",
+    "preferred_username",
+    "at_hash"
+  ]
+}`, url))
+			if err != nil {
+				t.Fail()
+			}
+		default:
+			w.WriteHeader(404)
+		}
+	}
+}
+
+func getTestServer(t *testing.T, anonymousEnabled bool, withFakeSSO bool) (argocd *ArgoCDServer, dexURL string) {
+	cm := test.NewFakeConfigMap()
+	if anonymousEnabled {
+		cm.Data["users.anonymous.enabled"] = "true"
+	}
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		return  // Start with a placeholder. We need the server URL before setting up the real handler.
+	}))
+	ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		dexMockHandler(t, ts.URL)(w, r)
+	})
+	if withFakeSSO {
+		cm.Data["url"] = ts.URL
+		cm.Data["dex.config"] = `
+connectors:
+  # OIDC
+  - type: OIDC
+    id: oidc
+    name: OIDC
+    config:
+    issuer: https://auth.example.gom
+    clientID: test-client
+    clientSecret: $dex.oidc.clientSecret`
+	}
+	secret := test.NewFakeSecret()
+	kubeclientset := fake.NewSimpleClientset(cm, secret)
+	appClientSet := apps.NewSimpleClientset()
+	argoCDOpts := ArgoCDServerOpts{
+		Namespace:     test.FakeArgoCDNamespace,
+		KubeClientset: kubeclientset,
+		AppClientset:  appClientSet,
+	}
+	if withFakeSSO {
+		argoCDOpts.DexServerAddr = ts.URL
+	}
+	argocd = NewServer(context.Background(), argoCDOpts)
+	return argocd, ts.URL
+}
+
+func TestAuthenticate_3rd_party_JWTs(t *testing.T) {
+	type testData struct {
+		test                  string
+		anonymousEnabled      bool
+		claims                jwt.RegisteredClaims
+		expectedErrorContains string
+		expectedClaims        interface{}
+	}
+	var tests = []testData{
+		{
+			test:                  "anonymous disabled, no audience",
+			anonymousEnabled:      false,
+			claims:                jwt.RegisteredClaims{},
+			expectedErrorContains: "no audience found in the token",
+			expectedClaims:        nil,
+		},
+		{
+			test:                  "anonymous enabled, no audience",
+			anonymousEnabled:      true,
+			claims:                jwt.RegisteredClaims{},
+			expectedErrorContains: "",
+			expectedClaims:        "",
+		},
+		{
+			test:                  "anonymous disabled, unexpired token, admin claim",
+			anonymousEnabled:      false,
+			claims:                jwt.RegisteredClaims{Audience: jwt.ClaimStrings{"test-client"}, Subject: "admin", ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour * 24))},
+			expectedErrorContains: "id token signed with unsupported algorithm",
+			expectedClaims:        nil,
+		},
+		{
+			test:                  "anonymous enabled, unexpired token, admin claim",
+			anonymousEnabled:      true,
+			claims:                jwt.RegisteredClaims{Audience: jwt.ClaimStrings{"test-client"}, Subject: "admin", ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour * 24))},
+			expectedErrorContains: "",
+			expectedClaims:        "",
+		},
+		{
+			test:                  "anonymous disabled, expired token, admin claim",
+			anonymousEnabled:      false,
+			claims:                jwt.RegisteredClaims{Audience: jwt.ClaimStrings{"test-client"}, Subject: "admin", ExpiresAt: jwt.NewNumericDate(time.Now())},
+			expectedErrorContains: "token is expired",
+			expectedClaims:        jwt.RegisteredClaims{Issuer:"sso"},
+		},
+		{
+			test:                  "anonymous enabled, expired token, admin claim",
+			anonymousEnabled:      true,
+			claims:                jwt.RegisteredClaims{Audience: jwt.ClaimStrings{"test-client"}, Subject: "admin", ExpiresAt: jwt.NewNumericDate(time.Now())},
+			expectedErrorContains: "",
+			expectedClaims:        "",
+		},
+	}
+
+	for _, testData := range tests {
+		testDataCopy := testData
+
+		t.Run(testDataCopy.test, func(t *testing.T) {
+			t.Parallel()
+
+			argocd, dexURL := getTestServer(t, testDataCopy.anonymousEnabled, true)
+			ctx := context.Background()
+			testDataCopy.claims.Issuer = fmt.Sprintf("%s/api/dex", dexURL)
+			token := jwt.NewWithClaims(jwt.SigningMethodHS256, testDataCopy.claims)
+			tokenString, err := token.SignedString([]byte("key"))
+			require.NoError(t, err)
+			ctx = metadata.NewIncomingContext(context.Background(), metadata.Pairs(apiclient.MetaDataTokenKey, tokenString))
+
+			ctx, err = argocd.Authenticate(ctx)
+			claims := ctx.Value("claims")
+			if testDataCopy.expectedClaims == nil {
+				assert.Nil(t, claims)
+			} else {
+				assert.Equal(t, testDataCopy.expectedClaims, claims)
+			}
+			if testDataCopy.expectedErrorContains != "" {
+				assert.ErrorContains(t, err, testDataCopy.expectedErrorContains, "Authenticate should have thrown an error and blocked the request")
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
+func TestAuthenticate_no_request_metadata(t *testing.T) {
+	type testData struct {
+		test                  string
+		anonymousEnabled      bool
+		expectedErrorContains string
+		expectedClaims        interface{}
+	}
+	var tests = []testData{
+		{
+			test:                  "anonymous disabled",
+			anonymousEnabled:      false,
+			expectedErrorContains: "no session information",
+			expectedClaims:        nil,
+		},
+		{
+			test:                  "anonymous enabled",
+			anonymousEnabled:      true,
+			expectedErrorContains: "",
+			expectedClaims:        "",
+		},
+	}
+
+	for _, testData := range tests {
+		testDataCopy := testData
+
+		t.Run(testDataCopy.test, func(t *testing.T) {
+			t.Parallel()
+
+			argocd, _ := getTestServer(t, testDataCopy.anonymousEnabled, true)
+			ctx := context.Background()
+
+			ctx, err := argocd.Authenticate(ctx)
+			claims := ctx.Value("claims")
+			assert.Equal(t, testDataCopy.expectedClaims, claims)
+			if testDataCopy.expectedErrorContains != "" {
+				assert.ErrorContains(t, err, testDataCopy.expectedErrorContains, "Authenticate should have thrown an error and blocked the request")
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
+func TestAuthenticate_no_SSO(t *testing.T) {
+	type testData struct {
+		test                 string
+		anonymousEnabled     bool
+		expectedErrorMessage string
+		expectedClaims       interface{}
+	}
+	var tests = []testData{
+		{
+			test:                 "anonymous disabled",
+			anonymousEnabled:     false,
+			expectedErrorMessage: "SSO is not configured",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled",
+			anonymousEnabled:     true,
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+	}
+
+	for _, testData := range tests {
+		testDataCopy := testData
+
+		t.Run(testDataCopy.test, func(t *testing.T) {
+			t.Parallel()
+
+			argocd, dexURL := getTestServer(t, testDataCopy.anonymousEnabled, false)
+			ctx := context.Background()
+			token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.RegisteredClaims{Issuer: fmt.Sprintf("%s/api/dex", dexURL)})
+			tokenString, err := token.SignedString([]byte("key"))
+			require.NoError(t, err)
+			ctx = metadata.NewIncomingContext(context.Background(), metadata.Pairs(apiclient.MetaDataTokenKey, tokenString))
+
+			ctx, err = argocd.Authenticate(ctx)
+			claims := ctx.Value("claims")
+			assert.Equal(t, testDataCopy.expectedClaims, claims)
+			if testDataCopy.expectedErrorMessage != "" {
+				assert.ErrorContains(t, err, testDataCopy.expectedErrorMessage, "Authenticate should have thrown an error and blocked the request")
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
+func TestAuthenticate_bad_request_metadata(t *testing.T) {
+	type testData struct {
+		test                 string
+		anonymousEnabled     bool
+		metadata             metadata.MD
+		expectedErrorMessage string
+		expectedClaims       interface{}
+	}
+	var tests = []testData{
+		{
+			test:                 "anonymous disabled, empty metadata",
+			anonymousEnabled:     false,
+			metadata:             metadata.MD{},
+			expectedErrorMessage: "no session information",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled, empty metadata",
+			anonymousEnabled:     true,
+			metadata:             metadata.MD{},
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+		{
+			test:                 "anonymous disabled, empty tokens",
+			anonymousEnabled:     false,
+			metadata:             metadata.MD{apiclient.MetaDataTokenKey: []string{}},
+			expectedErrorMessage: "no session information",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled, empty tokens",
+			anonymousEnabled:     true,
+			metadata:             metadata.MD{apiclient.MetaDataTokenKey: []string{}},
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+		{
+			test:                 "anonymous disabled, bad tokens",
+			anonymousEnabled:     false,
+			metadata:             metadata.Pairs(apiclient.MetaDataTokenKey, "bad"),
+			expectedErrorMessage: "token contains an invalid number of segments",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled, bad tokens",
+			anonymousEnabled:     true,
+			metadata:             metadata.Pairs(apiclient.MetaDataTokenKey, "bad"),
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+		{
+			test:                 "anonymous disabled, bad auth header",
+			anonymousEnabled:     false,
+			metadata:             metadata.MD{"authorization": []string{"Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZG1pbiJ9.TGGTTHuuGpEU8WgobXxkrBtW3NiR3dgw5LR-1DEW3BQ"}},
+			expectedErrorMessage: "no audience found in the token",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled, bad auth header",
+			anonymousEnabled:     true,
+			metadata:             metadata.MD{"authorization": []string{"Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZG1pbiJ9.TGGTTHuuGpEU8WgobXxkrBtW3NiR3dgw5LR-1DEW3BQ"}},
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+		{
+			test:                 "anonymous disabled, bad auth cookie",
+			anonymousEnabled:     false,
+			metadata:             metadata.MD{"grpcgateway-cookie": []string{"argocd.token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZG1pbiJ9.TGGTTHuuGpEU8WgobXxkrBtW3NiR3dgw5LR-1DEW3BQ"}},
+			expectedErrorMessage: "no audience found in the token",
+			expectedClaims:       nil,
+		},
+		{
+			test:                 "anonymous enabled, bad auth cookie",
+			anonymousEnabled:     true,
+			metadata:             metadata.MD{"grpcgateway-cookie": []string{"argocd.token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZG1pbiJ9.TGGTTHuuGpEU8WgobXxkrBtW3NiR3dgw5LR-1DEW3BQ"}},
+			expectedErrorMessage: "",
+			expectedClaims:       "",
+		},
+	}
+
+	for _, testData := range tests {
+		testDataCopy := testData
+
+		t.Run(testDataCopy.test, func(t *testing.T) {
+			t.Parallel()
+
+			argocd, _ := getTestServer(t, testDataCopy.anonymousEnabled, true)
+			ctx := context.Background()
+			ctx = metadata.NewIncomingContext(context.Background(), testDataCopy.metadata)
+
+			ctx, err := argocd.Authenticate(ctx)
+			claims := ctx.Value("claims")
+			assert.Equal(t, testDataCopy.expectedClaims, claims)
+			if testDataCopy.expectedErrorMessage != "" {
+				assert.ErrorContains(t, err, testDataCopy.expectedErrorMessage, "Authenticate should have thrown an error and blocked the request")
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
 func Test_getToken(t *testing.T) {
 	token := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
 	t.Run("Empty", func(t *testing.T) {

test/container/Dockerfile

@@ -2,7 +2,7 @@ FROM redis:6.2.6 as redis
 
 FROM node:12.18.4 as node
 
-FROM golang:1.17.6 as golang
+FROM golang:1.17 as golang
 
 FROM registry:2.7.1 as registry
 

test/remote/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.17.6 AS go
+FROM golang:1.17 AS go
 
 RUN go install github.com/mattn/goreman@latest && \
     go install github.com/kisielk/godepgraph@latest

ui/src/app/login/components/login.tsx

@@ -20,7 +20,7 @@ interface State {
     loginError: string;
     loginInProgress: boolean;
     returnUrl: string;
-    ssoLoginError: string;
+    hasSsoLoginError: boolean;
 }
 
 export class Login extends React.Component<RouteComponentProps<{}>, State> {
@@ -31,13 +31,13 @@ export class Login extends React.Component<RouteComponentProps<{}>, State> {
     public static getDerivedStateFromProps(props: RouteComponentProps<{}>): Partial<State> {
         const search = new URLSearchParams(props.history.location.search);
         const returnUrl = search.get('return_url') || '';
-        const ssoLoginError = search.get('sso_error') || '';
-        return {ssoLoginError, returnUrl};
+        const hasSsoLoginError = search.get('has_sso_error') === 'true';
+        return {hasSsoLoginError, returnUrl};
     }
 
     constructor(props: RouteComponentProps<{}>) {
         super(props);
-        this.state = {authSettings: null, loginError: null, returnUrl: null, ssoLoginError: null, loginInProgress: false};
+        this.state = {authSettings: null, loginError: null, returnUrl: null, hasSsoLoginError: false, loginInProgress: false};
     }
 
     public async componentDidMount() {
@@ -69,7 +69,7 @@ export class Login extends React.Component<RouteComponentProps<{}>, State> {
                                         )}
                                 </button>
                             </a>
-                            {this.state.ssoLoginError && <div className='argo-form-row__error-msg'>{this.state.ssoLoginError}</div>}
+                            {this.state.hasSsoLoginError && <div className='argo-form-row__error-msg'>Login failed.</div>}
                             {authSettings && !authSettings.userLoginsDisabled && (
                                 <div className='login__saml-separator'>
                                     <span>or</span>

ui/src/app/webpack.config.js

@@ -88,6 +88,10 @@ const config = {
                 {
                     from: 'node_modules/redoc/bundles/redoc.standalone.js',
                     to: 'assets/scripts/redoc.standalone.js'
+                },
+                {
+                    from: 'node_modules/monaco-editor/min/vs/base/browser/ui/codicons/codicon',
+                    to: 'assets/fonts'
                 }
             ]
         }),

ui/src/assets/fonts.css

@@ -1,3 +1,8 @@
+@font-face {
+	font-family: "codicon";
+	src: url("./fonts/codicon.ttf") format("truetype");
+}
+
 /* === Heebo - 300 */
 @font-face {
 	font-family: 'Heebo';

util/dex/dex.go

@@ -3,20 +3,18 @@ package dex
 import (
 	"bytes"
 	"fmt"
-	"html"
 	"io/ioutil"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
 	"path"
-	"regexp"
 	"strconv"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/argoproj/argo-cd/v2/util/errors"
 )
 
-var messageRe = regexp.MustCompile(`<p>(.*)([\s\S]*?)<\/p>`)
-
 func decorateDirector(director func(req *http.Request), target *url.URL) func(req *http.Request) {
 	return func(req *http.Request) {
 		director(req)
@@ -44,16 +42,10 @@ func NewDexHTTPReverseProxy(serverAddr string, baseHRef string) func(writer http
 			if err != nil {
 				return err
 			}
-			var message string
-			matches := messageRe.FindSubmatch(b)
-			if len(matches) > 1 {
-				message = html.UnescapeString(string(matches[1]))
-			} else {
-				message = "Unknown error"
-			}
+			log.Errorf("received error from dex: %s", string(b))
 			resp.ContentLength = 0
 			resp.Header.Set("Content-Length", strconv.Itoa(0))
-			resp.Header.Set("Location", fmt.Sprintf("%s?sso_error=%s", path.Join(baseHRef, "login"), url.QueryEscape(message)))
+			resp.Header.Set("Location", fmt.Sprintf("%s?has_sso_error=true", path.Join(baseHRef, "login")))
 			resp.StatusCode = http.StatusSeeOther
 			resp.Body = ioutil.NopCloser(bytes.NewReader(make([]byte, 0)))
 			return nil

util/dex/dex_test.go

@@ -408,7 +408,7 @@ func Test_DexReverseProxy(t *testing.T) {
 		assert.Equal(t, http.StatusSeeOther, resp.StatusCode)
 		location, _ := resp.Location()
 		fmt.Printf("%s %s\n", resp.Status, location.RequestURI())
-		assert.True(t, strings.HasPrefix(location.RequestURI(), "/login?sso_error"))
+		assert.True(t, strings.HasPrefix(location.RequestURI(), "/login?has_sso_error=true"))
 	})
 
 	t.Run("Invalid URL for Dex reverse proxy", func(t *testing.T) {

util/io/files/util.go

@@ -0,0 +1,35 @@
+package files
+
+import (
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// Inbound will validate if the given candidate path is inside the
+// baseDir. This is useful to make sure that malicious candidates
+// are not targeting a file outside of baseDir boundaries.
+// Considerations:
+// - baseDir must be absolute path. Will return false otherwise
+// - candidate can be absolute or relative path
+// - candidate should not be symlink as only syntatic validation is
+// applied by this function
+func Inbound(candidate, baseDir string) bool {
+	if !filepath.IsAbs(baseDir) {
+		return false
+	}
+	var target string
+	if filepath.IsAbs(candidate) {
+		target = filepath.Clean(candidate)
+	} else {
+		target = filepath.Join(baseDir, candidate)
+	}
+	return strings.HasPrefix(target, filepath.Clean(baseDir)+string(os.PathSeparator))
+}
+
+// IsSymlink return true if the given FileInfo relates to a
+// symlink file. Returns false otherwise.
+func IsSymlink(fi os.FileInfo) bool {
+	return fi.Mode()&fs.ModeSymlink == fs.ModeSymlink
+}

util/io/files/util_test.go

@@ -0,0 +1,63 @@
+package files_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/argoproj/argo-cd/v2/util/io/files"
+)
+
+func TestInbound(t *testing.T) {
+	type testcase struct {
+		name      string
+		candidate string
+		basedir   string
+		expected  bool
+	}
+	cases := []testcase{
+		{
+			name:      "will return true if candidate is inbound",
+			candidate: "/home/test/app/readme.md",
+			basedir:   "/home/test",
+			expected:  true,
+		},
+		{
+			name:      "will return false if candidate is not inbound",
+			candidate: "/home/test/../readme.md",
+			basedir:   "/home/test",
+			expected:  false,
+		},
+		{
+			name:      "will return true if candidate is relative inbound",
+			candidate: "./readme.md",
+			basedir:   "/home/test",
+			expected:  true,
+		},
+		{
+			name:      "will return false if candidate is relative outbound",
+			candidate: "../readme.md",
+			basedir:   "/home/test",
+			expected:  false,
+		},
+		{
+			name:      "will return false if basedir is relative",
+			candidate: "/home/test/app/readme.md",
+			basedir:   "./test",
+			expected:  false,
+		},
+	}
+	for _, c := range cases {
+		c := c
+		t.Run(c.name, func(t *testing.T) {
+			// given
+			t.Parallel()
+
+			// when
+			inbound := files.Inbound(c.candidate, c.basedir)
+
+			// then
+			assert.Equal(t, c.expected, inbound)
+		})
+	}
+}

util/session/sessionmanager.go

@@ -210,7 +210,7 @@ func (mgr *SessionManager) Parse(tokenString string) (jwt.Claims, string, error)
 	token, err := jwt.ParseWithClaims(tokenString, &claims, func(token *jwt.Token) (interface{}, error) {
 		// Don't forget to validate the alg is what you expect:
 		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
-			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
 		}
 		return argoCDSettings.ServerSignature, nil
 	})
@@ -262,7 +262,7 @@ func (mgr *SessionManager) Parse(tokenString string) (jwt.Claims, string, error)
 	}
 
 	if account.PasswordMtime != nil && issuedAt.Before(*account.PasswordMtime) {
-		return nil, "", fmt.Errorf("Account password has changed since token issued")
+		return nil, "", fmt.Errorf("account password has changed since token issued")
 	}
 
 	newToken := ""
@@ -477,7 +477,7 @@ func (mgr *SessionManager) VerifyToken(tokenString string) (jwt.Claims, string,
 		// IDP signed token
 		prov, err := mgr.provider()
 		if err != nil {
-			return claims, "", err
+			return nil, "", err
 		}
 
 		// Token must be verified for at least one audience
@@ -489,16 +489,30 @@ func (mgr *SessionManager) VerifyToken(tokenString string) (jwt.Claims, string,
 				break
 			}
 		}
+
+		// The token verification has failed. If the token has expired, we will
+		// return a dummy claims only containing a value for the issuer, so the
+		// UI can handle expired tokens appropriately.
 		if err != nil {
-			return claims, "", err
+			if strings.HasPrefix(err.Error(), "oidc: token is expired") {
+				claims = jwt.RegisteredClaims{
+					Issuer: "sso",
+				}
+				return claims, "", err
+			}
+			return nil, "", err
 		}
+
 		if idToken == nil {
-			return claims, "", fmt.Errorf("No audience found in the token")
+			return nil, "", fmt.Errorf("no audience found in the token")
 		}
 
 		var claims jwt.MapClaims
 		err = idToken.Claims(&claims)
-		return claims, "", err
+		if err != nil {
+			return nil, "", err
+		}
+		return claims, "", nil
 	}
 }