Omit adding the osd-version header when the Fetch request is to an…

… external origin

* Making `fetch` requests using core/public/http/fetch, an `osd-version` header is forcefully added, even to external requests. This change examines the destination and only adds the header to relative URLs and those that are to OSD itself.
* This change also adds `osd-xsrf` to calls that use `osd-version` incorrectly to satisfy XSRF protection

Fixes #3277

Signed-off-by: Miki <miki@amazon.com>

CHANGELOG.md

@@ -69,6 +69,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Vis Builder] Add metric to metric, bucket to bucket aggregation persistence ([#3495](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3495))
 - Use mirrors to download Node.js binaries to escape sporadic 404 errors ([#3619](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3619))
 - [Multiple DataSource] Refactor dev tool console to use opensearch-js client to send requests ([#3544](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3544))
+- Add `osd-xsrf` header to all requests that incorrectly used `node-version` to satisfy XSRF protection ([#3643](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3643))
 
 ### 🐛 Bug Fixes
 
@@ -107,6 +108,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Region Maps] Add ui setting to configure custom vector map's size parameter([#3399](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3399))
 - [Search Telemetry] Fixes search telemetry's observable object that won't be GC-ed([#3390](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3390))
 - Clean up and rebuild `@osd/pm` ([#3570](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3570))
+- Omit adding the `osd-version` header when the Fetch request is to an external origin ([#3643](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3643))
 
 ### 🚞 Infrastructure
 

src/core/public/http/fetch.ts

@@ -31,6 +31,7 @@
 import { omitBy } from 'lodash';
 import { format } from 'url';
 import { BehaviorSubject } from 'rxjs';
+import { isRelativeUrl } from '@osd/std';
 
 import {
   IBasePath,
@@ -144,7 +145,6 @@ export class Fetch {
       headers: removedUndefined({
         'Content-Type': 'application/json',
         ...options.headers,
-        'osd-version': this.params.opensearchDashboardsVersion,
       }),
     };
 
@@ -158,6 +158,18 @@ export class Fetch {
       fetchOptions.headers['osd-system-request'] = 'true';
     }
 
+    /* `osd-version` is used on the server-side to make sure that an incoming request originated from a front-end
+     * of the same version; see core/server/http/lifecycle_handlers.ts
+     * `osd-xsrf` is to satisfy XSRF protection but is only meaningful to OpenSearch Dashboards.
+     *
+     * If url equals `basePath,  starts with `basePath` + '/', or is relative, add `osd-version` and `osd-xsrf` headers.
+     */
+    const basePath = this.params.basePath.get();
+    if (isRelativeUrl(url) || url === basePath || url.startsWith(`${basePath}/`)) {
+      fetchOptions.headers['osd-version'] = this.params.opensearchDashboardsVersion;
+      fetchOptions.headers['osd-xsrf'] = 'osd-fetch';
+    }
+
     return new Request(url, fetchOptions as RequestInit);
   }
 

src/core/server/http/integration_tests/lifecycle_handlers.test.ts

@@ -231,12 +231,14 @@ describe('core lifecycle handlers', () => {
             .expect(200, 'ok');
         });
 
+        // ToDo: Remove next; `osd-version` incorrectly used for satisfying XSRF protection
         it('accepts requests with the version header', async () => {
           await getSupertest(method.toLowerCase(), testPath)
             .set(versionHeader, actualVersion)
             .expect(200, 'ok');
         });
 
+        // ToDo: Rename next; `osd-version` incorrectly used for satisfying XSRF protection
         it('rejects requests without either an xsrf or version header', async () => {
           await getSupertest(method.toLowerCase(), testPath).expect(400, {
             statusCode: 400,
@@ -245,6 +247,7 @@ describe('core lifecycle handlers', () => {
           });
         });
 
+        // ToDo: Rename next; `osd-version` incorrectly used for satisfying XSRF protection
         it('accepts whitelisted requests without either an xsrf or version header', async () => {
           await getSupertest(method.toLowerCase(), whitelistedTestPath).expect(200, 'ok');
         });

src/core/server/http/lifecycle_handlers.test.ts

@@ -102,6 +102,7 @@ describe('xsrf post-auth handler', () => {
       expect(result).toEqual('next');
     });
 
+    // ToDo: Remove; `osd-version` incorrectly used for satisfying XSRF protection
     it('accepts requests with version header', () => {
       const config = createConfig({ xsrf: { whitelist: [], disableProtection: false } });
       const handler = createXsrfPostAuthHandler(config);
@@ -199,7 +200,7 @@ describe('versionCheck post-auth handler', () => {
     responseFactory = httpServerMock.createLifecycleResponseFactory();
   });
 
-  it('forward the request to the next interceptor if header matches', () => {
+  it('forward the request to the next interceptor if osd-version header matches the actual version', () => {
     const handler = createVersionCheckPostAuthHandler('actual-version');
     const request = forgeRequest({ headers: { 'osd-version': 'actual-version' } });
 
@@ -212,7 +213,7 @@ describe('versionCheck post-auth handler', () => {
     expect(result).toBe('next');
   });
 
-  it('returns a badRequest error if header does not match', () => {
+  it('returns a badRequest error if osd-version header exists but does not match the actual version', () => {
     const handler = createVersionCheckPostAuthHandler('actual-version');
     const request = forgeRequest({ headers: { 'osd-version': 'another-version' } });
 
@@ -236,7 +237,7 @@ describe('versionCheck post-auth handler', () => {
     expect(result).toBe('badRequest');
   });
 
-  it('forward the request to the next interceptor if header is not present', () => {
+  it('forward the request to the next interceptor if osd-version header is not present', () => {
     const handler = createVersionCheckPostAuthHandler('actual-version');
     const request = forgeRequest({ headers: {} });
 

src/core/server/http/lifecycle_handlers.ts

@@ -54,8 +54,9 @@ export const createXsrfPostAuthHandler = (config: HttpConfig): OnPostAuthHandler
     const hasVersionHeader = VERSION_HEADER in request.headers;
     const hasXsrfHeader = XSRF_HEADER in request.headers;
 
+    // ToDo: Remove !hasVersionHeader; `osd-version` incorrectly used for satisfying XSRF protection
     if (!isSafeMethod(request.route.method) && !hasVersionHeader && !hasXsrfHeader) {
-      return response.badRequest({ body: `Request must contain a ${XSRF_HEADER} header.` });
+      return response.badRequest({ body: `Request must contain the ${XSRF_HEADER} header.` });
     }
 
     return toolkit.next();

src/plugins/bfetch/public/plugin.ts

@@ -95,6 +95,7 @@ export class BfetchPublicPlugin
       url: `${basePath}/${removeLeadingSlash(params.url)}`,
       headers: {
         'Content-Type': 'application/json',
+        'osd-xsrf': 'osd-bfetch',
         'osd-version': version,
         ...(params.headers || {}),
       },

src/plugins/opensearch_dashboards_legacy/public/angular/angular_config.tsx

@@ -159,6 +159,8 @@ export const $setupXsrfRequestInterceptor = (version: string) => {
   // Configure jQuery prefilter
   $.ajaxPrefilter(({ osdXsrfToken = true }: any, originalOptions, jqXHR) => {
     if (osdXsrfToken) {
+      jqXHR.setRequestHeader('osd-xsrf', 'osd-legacy');
+      // ToDo: Remove next; `osd-version` incorrectly used for satisfying XSRF protection
       jqXHR.setRequestHeader('osd-version', version);
     }
   });
@@ -170,6 +172,8 @@ export const $setupXsrfRequestInterceptor = (version: string) => {
         request(opts) {
           const { osdXsrfToken = true } = opts as any;
           if (osdXsrfToken) {
+            set(opts, ['headers', 'osd-xsrf'], 'osd-legacy');
+            // ToDo: Remove next; `osd-version` incorrectly used for satisfying XSRF protection
             set(opts, ['headers', 'osd-version'], version);
           }
           return opts;