backport of commit 999111e5b3 (#23493)

Co-authored-by: Robert <17119716+robmonte@users.noreply.github.com>

builtin/credential/aws/backend_test.go

@@ -1504,7 +1504,7 @@ func buildCallerIdentityLoginData(request *http.Request, roleName string) (map[s
 		"iam_request_url":         base64.StdEncoding.EncodeToString([]byte(request.URL.String())),
 		"iam_request_headers":     base64.StdEncoding.EncodeToString(headersJson),
 		"iam_request_body":        base64.StdEncoding.EncodeToString(requestBody),
-		"role":                    roleName,
+		"request_role":            roleName,
 	}, nil
 }
 

builtin/credential/aws/path_login.go

@@ -292,7 +292,7 @@ func (b *backend) pathLoginIamGetRoleNameCallerIdAndEntity(ctx context.Context,
 
 	config, err := b.lockedClientConfigEntry(ctx, req.Storage)
 	if err != nil {
-		return "", nil, nil, nil, fmt.Errorf("error getting configuration: %w", err)
+		return "", nil, nil, logical.ErrorResponse("error getting configuration"), nil
 	}
 
 	endpoint := "https://sts.amazonaws.com"
@@ -319,23 +319,23 @@ func (b *backend) pathLoginIamGetRoleNameCallerIdAndEntity(ctx context.Context,
 		if config.MaxRetries >= 0 {
 			maxRetries = config.MaxRetries
 		}
+	}
 
-		// Extract and use a regional STS endpoint
-		// based on the region set in the Authorization header.
-		if config.UseSTSRegionFromClient {
-			clientSpecifiedRegion, err := awsRegionFromHeader(headers.Get("Authorization"))
-			if err != nil {
-				return "", nil, nil, logical.ErrorResponse("region missing from Authorization header"), nil
-			}
-
-			url, err := stsRegionalEndpoint(clientSpecifiedRegion)
-			if err != nil {
-				return "", nil, nil, logical.ErrorResponse(err.Error()), nil
-			}
-
-			b.Logger().Debug("use_sts_region_from_client set; using region specified from header", "region", clientSpecifiedRegion)
-			endpoint = url
+	// Extract and use a regional STS endpoint
+	// based on the region set in the Authorization header.
+	if config.UseSTSRegionFromClient {
+		clientSpecifiedRegion, err := awsRegionFromHeader(headers.Get("Authorization"))
+		if err != nil {
+			return "", nil, nil, logical.ErrorResponse("region missing from Authorization header"), nil
 		}
+
+		url, err := stsRegionalEndpoint(clientSpecifiedRegion)
+		if err != nil {
+			return "", nil, nil, logical.ErrorResponse(err.Error()), nil
+		}
+
+		b.Logger().Debug("use_sts_region_from_client set; using region specified from header", "region", clientSpecifiedRegion)
+		endpoint = url
 	}
 
 	b.Logger().Debug("submitting caller identity request", "endpoint", endpoint)

builtin/credential/aws/path_login_test.go

@@ -308,56 +308,6 @@ func TestBackend_validateVaultPostRequestValues(t *testing.T) {
 	}
 }
 
-// TestBackend_pathLogin_NoClientConfig covers logging in via IAM auth when the
-// client config does not exist. This is a regression test to cover potential
-// panics when referencing the potentially-nil config in the login handler. For
-// details see https://github.com/hashicorp/vault/issues/23361.
-func TestBackend_pathLogin_NoClientConfig(t *testing.T) {
-	storage := new(logical.InmemStorage)
-	config := logical.TestBackendConfig()
-	config.StorageView = storage
-	b, err := Backend(config)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = b.Setup(context.Background(), config)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	// Intentionally left out the client configuration
-
-	roleEntry := &awsRoleEntry{
-		RoleID:   "foo",
-		Version:  currentRoleStorageVersion,
-		AuthType: iamAuthType,
-	}
-	err = b.setRole(context.Background(), storage, testValidRoleName, roleEntry)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	loginData, err := defaultLoginData()
-	if err != nil {
-		t.Fatal(err)
-	}
-	loginRequest := &logical.Request{
-		Operation:  logical.UpdateOperation,
-		Path:       "login",
-		Storage:    storage,
-		Data:       loginData,
-		Connection: &logical.Connection{},
-	}
-	resp, err := b.HandleRequest(context.Background(), loginRequest)
-	if err != nil {
-		t.Fatalf("expected nil error, got: %v", err)
-	}
-	if !resp.IsError() {
-		t.Fatalf("expected error response, got: %+v", resp)
-	}
-}
-
 // TestBackend_pathLogin_IAMHeaders tests login with iam_request_headers,
 // supporting both base64 encoded string and JSON headers
 func TestBackend_pathLogin_IAMHeaders(t *testing.T) {

changelog/23366.txt

@@ -1,3 +0,0 @@
-```release-note:bug
-auth/aws: Fixes a panic that can occur in IAM-based login when a [client config](https://developer.hashicorp.com/vault/api-docs/auth/aws#configure-client) does not exist.
-```

website/content/docs/release-notes/1.15.0.mdx

@@ -16,7 +16,6 @@ description: |-
 Version | Issue
 ------- | -----
 1.15.0+ | [Vault no longer reports rollback metrics by mountpoint](/vault/docs/upgrading/upgrade-to-1.15.x#rollback-metrics)
-1.15.0  | [Panic in AWS auth method during IAM-based login](/vault/docs/upgrading/upgrade-to-1.15.x#panic-in-aws-auth-method-during-iam-based-login)
 
 ## Vault companion updates
 
@@ -60,7 +59,7 @@ Follow the learn more links for more information, or browse the list of
     </tr>
   </thead>
   <tbody>
-
+  
   <tr>
     <td rowSpan={2} style={{verticalAlign: 'middle'}}>
       Vault Agent
@@ -77,7 +76,7 @@ Follow the learn more links for more information, or browse the list of
   <tr>
     <td style={{verticalAlign: 'middle', textAlign: 'center'}}>GA</td>
     <td style={{verticalAlign: 'middle'}}>
-      Fetch secrets directly into your application as environment variables.
+      Fetch secrets directly into your application as environment variables. 
       <br /><br />
       Learn more: <a href="/vault/docs/agent-and-proxy/agent/process-supervisor">Process Supervisor Mode</a>
     </td>

website/content/docs/upgrading/upgrade-to-1.15.x.mdx

@@ -50,5 +50,3 @@ option.
 @include 'known-issues/transit-managed-keys-panics.mdx'
 
 @include 'known-issues/transit-managed-keys-sign-fails.mdx'
-
-@include 'known-issues/aws-auth-panics.mdx'

website/content/partials/known-issues/aws-auth-panics.mdx

@@ -1,18 +0,0 @@
-### Panic in AWS auth method during IAM-based login
-
-#### Affected versions
-
-- 1.15.0
-
-#### Issue
-
-A panic can occur in the AWS auth method during [IAM-based](/vault/docs/auth/aws#iam-auth-method)
-login when a [client config](/vault/api-docs/auth/aws#configure-client) does not exist.
-
-#### Workaround
-
-The panic can be avoided by writing an empty [client config](/vault/api-docs/auth/aws#configure-client):
-
-```shell-session
-vault write -f auth/aws/config/client
-```