[7.9.1] Restrict chromium requests

.github/workflows/kibana-reports-test-and-build-workflow.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           repository: elastic/kibana
           ref: v7.9.1
-          path: dashboards-reports/kibana
+          path: kibana
 
       - name: Setup Node
         uses: actions/setup-node@v1
@@ -27,13 +27,13 @@ jobs:
 
       - name: Move Kibana Reports to Plugins Dir
         run: |
-          mkdir kibana/plugins
-          mv kibana-reports kibana/plugins/${{ env.PLUGIN_NAME }}
+          mkdir -p ../kibana/plugins
+          mv kibana-reports ../kibana/plugins/${{ env.PLUGIN_NAME }}
 
       - name: Add Chromium Binary to Reporting for Testing
         run: |
           sudo apt install -y libnss3-dev fonts-liberation libfontconfig1
-          cd kibana/plugins/${{ env.PLUGIN_NAME }}
+          cd ../kibana/plugins/${{ env.PLUGIN_NAME }}
           wget https://github.com/opendistro-for-elasticsearch/kibana-reports/releases/download/chromium-1.12.0.0/chromium-linux-x64.zip
           unzip chromium-linux-x64.zip
           rm chromium-linux-x64.zip
@@ -43,14 +43,14 @@ jobs:
         with:
           timeout_minutes: 30
           max_attempts: 3
-          command: cd kibana/plugins/${{ env.PLUGIN_NAME }}; yarn kbn bootstrap
+          command: cd ../kibana/plugins/${{ env.PLUGIN_NAME }}; yarn kbn bootstrap
 
       - name: Test
         uses: nick-invision/retry@v1
         with:
           timeout_minutes: 30
           max_attempts: 3
-          command: cd kibana/plugins/${{ env.PLUGIN_NAME }}; yarn test --coverage
+          command: cd ../kibana/plugins/${{ env.PLUGIN_NAME }}; yarn test --coverage
 
       - name: Uploads coverage
         uses: codecov/codecov-action@v1
@@ -59,7 +59,7 @@ jobs:
 
       - name: Build Artifact
         run: |
-          cd kibana/plugins/${{ env.PLUGIN_NAME }}
+          cd ../kibana/plugins/${{ env.PLUGIN_NAME }}
           yarn build
 
           cd build
@@ -93,16 +93,16 @@ jobs:
         uses: actions/upload-artifact@v1
         with:
           name: kibana-reports-linux-x64
-          path: kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-linux-x64.zip
+          path: ../kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-linux-x64.zip
 
       - name: Upload Artifact For Linux arm64
         uses: actions/upload-artifact@v1
         with:
           name: kibana-reports-linux-arm64
-          path: kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-linux-arm64.zip
+          path: ../kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-linux-arm64.zip
 
       - name: Upload Artifact For Windows
         uses: actions/upload-artifact@v1
         with:
           name: kibana-reports-windows-x64
-          path: kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-windows-x64.zip
+          path: ../kibana/plugins/${{ env.PLUGIN_NAME }}/build/${{ env.PLUGIN_NAME }}-${{ env.OD_VERSION }}-windows-x64.zip

kibana-reports/package.json

@@ -29,15 +29,15 @@
     "@elastic/elasticsearch": "^7.8.0",
     "@elastic/eui": "^26.0.0",
     "@nteract/markdown": "^4.5.1",
-    "@types/dompurify": "^2.0.4",
+    "@types/dompurify": "^2.3.3",
     "@types/jsdom": "^16.2.4",
     "@types/react-addons-test-utils": "^0.14.25",
     "async-mutex": "^0.2.6",
     "babel-polyfill": "^6.26.0",
     "cheerio": "^1.0.0-rc.3",
     "cron-validator": "^1.1.1",
     "cypress": "^5.5.0",
-    "dompurify": "^2.1.1",
+    "dompurify": "^2.3.8",
     "elastic-builder": "^2.7.1",
     "enzyme-adapter-react-16": "^1.15.5",
     "jest-fetch-mock": "^3.0.3",

kibana-reports/public/components/report_definitions/create/create_report_definition.tsx

@@ -251,17 +251,6 @@ export function CreateReport(props) {
       setPreErrorData(metadata);
       setComingFromError(true);
     } else {
-      // convert header and footer to html
-      if ('header' in metadata.report_params.core_params) {
-        metadata.report_params.core_params.header = converter.makeHtml(
-          metadata.report_params.core_params.header
-        );
-      }
-      if ('footer' in metadata.report_params.core_params) {
-        metadata.report_params.core_params.footer = converter.makeHtml(
-          metadata.report_params.core_params.footer
-        );
-      }
       httpClient
         .post('../api/reporting/reportDefinition', {
           body: JSON.stringify(metadata),

kibana-reports/public/components/report_definitions/report_settings/report_settings.tsx

@@ -326,13 +326,13 @@ export function ReportSettings(props: ReportSettingProps) {
             if (header) {
               checkboxIdSelectHeaderFooter.header = true;
               if (!unmounted) {
-                setHeader(converter.makeMarkdown(header));
+                setHeader(header);
               }
             }
             if (footer) {
               checkboxIdSelectHeaderFooter.footer = true;
               if (!unmounted) {
-                setFooter(converter.makeMarkdown(footer));
+                setFooter(footer);
               }
             }
           })

kibana-reports/server/routes/utils/__tests__/visualReportHelper.test.ts

@@ -74,7 +74,10 @@ describe.skip('test create visual report', () => {
     const { dataUrl, fileName } = await createVisualReport(
       reportParams as ReportParamsSchemaType,
       queryUrl,
-      mockLogger
+      mockLogger,
+      undefined,
+      undefined,
+      /^(data:image|file:\/\/)/
     );
     expect(fileName).toContain(`${reportParams.report_name}`);
     expect(fileName).toContain('.png');
@@ -89,7 +92,10 @@ describe.skip('test create visual report', () => {
     const { dataUrl, fileName } = await createVisualReport(
       reportParams as ReportParamsSchemaType,
       queryUrl,
-      mockLogger
+      mockLogger,
+      undefined,
+      undefined,
+      /^(data:image|file:\/\/)/
     );
     expect(fileName).toContain(`${reportParams.report_name}`);
     expect(fileName).toContain('.pdf');

kibana-reports/server/routes/utils/constants.ts

@@ -14,6 +14,7 @@
  */
 
 import { CountersType } from './types';
+import Showdown from 'showdown';
 
 export enum FORMAT {
   pdf = 'pdf',
@@ -81,7 +82,36 @@ export const DEFAULT_REPORT_HEADER = '<h1>Open Distro Kibana Reports</h1>';
 
 export const SECURITY_AUTH_COOKIE_NAME = 'security_authentication';
 
+export const converter = new Showdown.Converter({
+  tables: true,
+  simplifiedAutoLink: true,
+  strikethrough: true,
+  tasklists: true,
+  noHeaderId: true,
+});
+
+const BLOCKED_KEYWORD = 'BLOCKED_KEYWORD';
+const ipv4Regex = /(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?):([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])/g
+const ipv6Regex = /(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))/g;
+const localhostRegex = /localhost:([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])/g;
+const iframeRegex = /iframe/g;
+
+export const ALLOWED_HOSTS = /^(0|0.0.0.0|127.0.0.1|localhost|(.*\.)?(opensearch.org|aws.a2z.com))$/;
+
+export const replaceBlockedKeywords = (htmlString: string) => {
+  // replace <ipv4>:<port>
+  htmlString = htmlString.replace(ipv4Regex, BLOCKED_KEYWORD);
+  // replace ipv6 addresses
+  htmlString = htmlString.replace(ipv6Regex, BLOCKED_KEYWORD);
+  // replace iframe keyword
+  htmlString = htmlString.replace(iframeRegex, BLOCKED_KEYWORD);
+  // replace localhost:<port>
+  htmlString = htmlString.replace(localhostRegex, BLOCKED_KEYWORD);
+  return htmlString;
+}
+
 export const CHROMIUM_PATH = `${__dirname}/../../../.chromium/headless_shell`;
+
 
 /**
  * Metric constants

kibana-reports/server/routes/utils/visual_report/visualReportHelper.ts

@@ -23,10 +23,12 @@ import {
   FORMAT,
   SELECTOR,
   CHROMIUM_PATH,
+  ALLOWED_HOSTS,
 } from '../constants';
 import { getFileName } from '../helpers';
 import { CreateReportResultType } from '../types';
 import { ReportParamsSchemaType, VisualReportSchemaType } from 'server/model';
+import { converter, replaceBlockedKeywords } from '../constants';
 import fs from 'fs';
 import cheerio from 'cheerio';
 
@@ -35,7 +37,8 @@ export const createVisualReport = async (
   queryUrl: string,
   logger: Logger,
   cookie?: SetCookie,
-  timezone?: string
+  timezone?: string,
+  validRequestProtocol = /^(data:image)/
 ): Promise<CreateReportResultType> => {
   const {
     core_params,
@@ -54,10 +57,21 @@ export const createVisualReport = async (
   const window = new JSDOM('').window;
   const DOMPurify = createDOMPurify(window);
 
-  const reportHeader = header
-    ? DOMPurify.sanitize(header)
+  let keywordFilteredHeader = header 
+    ? converter.makeHtml(header) 
     : DEFAULT_REPORT_HEADER;
-  const reportFooter = footer ? DOMPurify.sanitize(footer) : '';
+  let keywordFilteredFooter = footer ? converter.makeHtml(footer) : '';
+
+  keywordFilteredHeader = DOMPurify.sanitize(keywordFilteredHeader);
+  keywordFilteredFooter = DOMPurify.sanitize(keywordFilteredFooter);
+
+  // filter blocked keywords in header and footer
+  if (keywordFilteredHeader !== '') {
+    keywordFilteredHeader = replaceBlockedKeywords(keywordFilteredHeader);
+  }
+  if (keywordFilteredFooter !== '') {
+    keywordFilteredFooter = replaceBlockedKeywords(keywordFilteredFooter);
+  }
 
   // add waitForDynamicContent function
   const waitForDynamicContent = async (
@@ -94,13 +108,48 @@ export const createVisualReport = async (
      * TODO: temp fix to disable sandbox when launching chromium on Linux instance
      * https://github.com/puppeteer/puppeteer/blob/main/docs/troubleshooting.md#setting-up-chrome-linux-sandbox
      */
-    args: ['--no-sandbox', '--disable-setuid-sandbox', '--disable-gpu', '--no-zygote', '--single-process'],
+    args: [
+      '--no-sandbox',
+      '--disable-setuid-sandbox',
+      '--disable-gpu',
+      '--no-zygote',
+      '--single-process',
+      '--font-render-hinting=none',
+      '--js-flags="--jitless --no-opt"',
+      '--disable-features=V8OptimizeJavascript',
+    ],
     executablePath: CHROMIUM_PATH,
     env: {
       TZ: timezone || 'UTC',
     },
   });
   const page = await browser.newPage();
+
+  await page.setRequestInterception(true);
+  let localStorageAvailable = true;
+  page.on('request', (req) => {
+    // disallow non-allowlisted connections. urls with valid protocols do not need ALLOWED_HOSTS check
+    if (
+      !validRequestProtocol.test(req.url()) &&
+      !ALLOWED_HOSTS.test(new URL(req.url()).hostname)
+    ) {
+      if (req.isNavigationRequest() && req.redirectChain().length > 0) {
+        localStorageAvailable = false;
+        logger.error(
+          'Reporting does not allow redirections to outside of localhost, aborting. URL received: ' +
+            req.url()
+        );
+      } else {
+        logger.warn(
+          'Disabled connection to non-allowlist domains: ' + req.url()
+        );
+      }
+      req.abort();
+    } else {
+      req.continue();
+    }
+  });
+
   page.setDefaultNavigationTimeout(0);
   page.setDefaultTimeout(100000); // use 100s timeout instead of default 30s
   if (cookie) {
@@ -167,12 +216,27 @@ export const createVisualReport = async (
   const screenshot = await page.screenshot({ fullPage: true });
 
   const templateHtml = composeReportHtml(
-    reportHeader,
-    reportFooter,
+    keywordFilteredHeader,
+    keywordFilteredFooter,
     screenshot.toString('base64')
   );
   await page.setContent(templateHtml);
 
+  // this causes UT to fail in github CI but works locally
+  try {
+    const numDisallowedTags = await page.evaluate(
+      () =>
+        document.getElementsByTagName('iframe').length +
+        document.getElementsByTagName('embed').length +
+        document.getElementsByTagName('object').length
+    );
+    if (numDisallowedTags > 0) {
+      throw Error('Reporting does not support "iframe", "embed", or "object" tags, aborting');
+    }
+  } catch (error) {
+    logger.error(error);
+  }
+
   // create pdf or png accordingly
   if (reportFormat === FORMAT.pdf) {
     const scrollHeight = await page.evaluate(