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Added Tomcat HTTP and AJP Weak Credentials Testers
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...s/credentials/genericweakcredentialdetector/testers/tomcat/TomcatAjpCredentialTester.java
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| /* | ||
| * Copyright 2023 Google LLC | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package com.google.tsunami.plugins.detectors.credentials.genericweakcredentialdetector.testers.tomcat; | ||
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| import static com.google.common.base.Preconditions.checkNotNull; | ||
| import static com.google.common.collect.ImmutableList.toImmutableList; | ||
| import static java.nio.charset.StandardCharsets.UTF_8; | ||
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| import com.doyensec.ajp13.AjpMessage; | ||
| import com.doyensec.ajp13.AjpReader; | ||
| import com.doyensec.ajp13.ForwardRequestMessage; | ||
| import com.doyensec.ajp13.Pair; | ||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.flogger.GoogleLogger; | ||
| import com.google.tsunami.common.data.NetworkEndpointUtils; | ||
| import com.google.tsunami.common.data.NetworkServiceUtils; | ||
| import com.google.tsunami.plugins.detectors.credentials.genericweakcredentialdetector.provider.TestCredential; | ||
| import com.google.tsunami.plugins.detectors.credentials.genericweakcredentialdetector.tester.CredentialTester; | ||
| import com.google.tsunami.proto.NetworkService; | ||
| import java.io.DataInputStream; | ||
| import java.io.DataOutputStream; | ||
| import java.io.IOException; | ||
| import java.net.Socket; | ||
| import java.sql.Timestamp; | ||
| import java.util.Base64; | ||
| import java.util.Date; | ||
| import java.util.LinkedList; | ||
| import java.util.List; | ||
| import javax.inject.Inject; | ||
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| /** Credential tester for Tomcat using AJP. */ | ||
| public final class TomcatAjpCredentialTester extends CredentialTester { | ||
| private static final GoogleLogger logger = GoogleLogger.forEnclosingClass(); | ||
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| private static final String AJP13_SERVICE = "ajp13"; | ||
| private static final String TOMCAT_COOKIE_SET = "set-cookie: JSESSIONID"; | ||
| private static final String TOMCAT_AUTH_HEADER = "Basic realm=\"Tomcat Manager Application\""; | ||
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| @Inject | ||
| TomcatAjpCredentialTester() { | ||
| } | ||
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| @Override | ||
| public String name() { | ||
| return "TomcatAjpCredentialTester"; | ||
| } | ||
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| @Override | ||
| public boolean batched() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public String description() { | ||
| return "Tomcat AJP credential tester."; | ||
| } | ||
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| @Override | ||
| public boolean canAccept(NetworkService networkService) { | ||
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| var uriAuthority = NetworkEndpointUtils.toUriAuthority(networkService.getNetworkEndpoint()); | ||
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| boolean canAcceptByNmapReport = | ||
| NetworkServiceUtils.getWebServiceName(networkService).equals(AJP13_SERVICE); | ||
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| if (canAcceptByNmapReport) { | ||
| return true; | ||
| } | ||
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| boolean canAcceptByCustomFingerprint = false; | ||
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| String[] uriParts = uriAuthority.split(":"); | ||
| String host = uriParts[0]; | ||
| int port = Integer.parseInt(uriParts[1]); | ||
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| // Check if the server response indicates a redirection to /manager/html. | ||
| // This typically means that the Tomcat Manager is active and automatically | ||
| // redirects users to the management interface when accessing the base manager URL. | ||
| try { | ||
| logger.atInfo().log("probing Tomcat manager - custom fingerprint phase using AJP"); | ||
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| List<Pair<String, String>> headers = new LinkedList<>(); | ||
| List<Pair<String, String>> attributes = new LinkedList<>(); | ||
| AjpMessage request = new ForwardRequestMessage( | ||
| 2, "HTTP/1.1", "/manager/html", host, host, host, port, true, headers, attributes); | ||
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| byte[] response = sendAndReceive(host, port, request.getBytes()); | ||
| AjpMessage responseMessage = AjpReader.parseMessage(response); | ||
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| canAcceptByCustomFingerprint = responseMessage.getDescription() | ||
| .toLowerCase().contains(TOMCAT_AUTH_HEADER.toLowerCase()); | ||
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| } catch (Exception e) { | ||
| // This catch block will catch both IOException and NullPointerException | ||
| logger.atWarning().withCause(e).log("Unable to query '%s'.", uriAuthority); | ||
| return false; | ||
| } | ||
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| return canAcceptByCustomFingerprint; | ||
| } | ||
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| @Override | ||
| public ImmutableList<TestCredential> testValidCredentials( | ||
| NetworkService networkService, List<TestCredential> credentials) { | ||
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| return credentials.stream() | ||
| .filter(cred -> isTomcatAccessible(networkService, cred)) | ||
| .collect(toImmutableList()); | ||
| } | ||
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| private boolean isTomcatAccessible(NetworkService networkService, TestCredential credential) { | ||
| var uriAuthority = NetworkEndpointUtils.toUriAuthority(networkService.getNetworkEndpoint()); | ||
| String[] uriParts = uriAuthority.split(":"); | ||
| String host = uriParts[0]; | ||
| int port = Integer.parseInt(uriParts[1]); | ||
| var url = String.format("http://%s/%s", uriAuthority, "manager/html"); | ||
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| logger.atInfo().log("uriAuthority: %s", uriAuthority); | ||
| try { | ||
| logger.atInfo().log( | ||
| "url: %s, username: %s, password: %s", | ||
| url, credential.username(), credential.password().orElse("")); | ||
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| String authorization = "Basic " + Base64.getEncoder() | ||
| .encodeToString((credential.username() + ":" + credential.password().orElse("")) | ||
| .getBytes(UTF_8)); | ||
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| List<Pair<String, String>> headers = new LinkedList<>(); | ||
| headers.add(Pair.make("Authorization", authorization)); | ||
| List<Pair<String, String>> attributes = new LinkedList<>(); | ||
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| AjpMessage request = new ForwardRequestMessage( | ||
| 2, "HTTP/1.1", "/manager/html", host, host, host, port, true, headers, attributes); | ||
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| byte[] response = sendAndReceive(host, port, request.getBytes()); | ||
| AjpMessage responseMessage = AjpReader.parseMessage(response); | ||
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| return headersContainsSuccessfulLoginElements(responseMessage); | ||
| } catch (IOException e) { | ||
| logger.atWarning().withCause(e).log("Unable to query '%s'.", url); | ||
| return false; | ||
| } | ||
| } | ||
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| // This methods send the AjpMessage generated via sockets and return the response from the server | ||
| private byte[] sendAndReceive(String host, int port, byte[] data) throws IOException { | ||
| try (Socket socket = new Socket(host, port)) { | ||
| DataOutputStream os = new DataOutputStream(socket.getOutputStream()); | ||
| DataInputStream is = new DataInputStream(socket.getInputStream()); | ||
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| os.write(data); | ||
| os.flush(); | ||
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| byte[] buffReply = new byte[8192]; | ||
| int bytesRead = is.read(buffReply); | ||
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| if (bytesRead > 0) { | ||
| byte[] fullReply = new byte[bytesRead]; | ||
| System.arraycopy(buffReply, 0, fullReply, 0, bytesRead); | ||
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| return fullReply; | ||
| } | ||
| return new byte[0]; | ||
| } catch (IOException e) { | ||
| logger.atSevere().withCause(e).log("Error sendind the AjpMessage"); | ||
| throw e; | ||
| } | ||
| } | ||
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| // This method checks if the response headers contain elements indicative of a Tomcat manager | ||
| // page. Specifically, it examines the cookies set rather than body elements to improve the | ||
| // efficiency and speed of the plugin. By focusing on headers, the plugin can quickly identify | ||
| // successful logins without parsing potentially large and variable body content. | ||
| private static boolean headersContainsSuccessfulLoginElements(AjpMessage responseMessage) { | ||
| try { | ||
| String responseHeaders = responseMessage.getDescription().toLowerCase(); | ||
| if (responseHeaders.contains(TOMCAT_COOKIE_SET.toLowerCase())) { | ||
| logger.atInfo().log( | ||
| "Found Tomcat endpoint (TOMCAT_COOKIE_SET string present in the page)"); | ||
| return true; | ||
| } else { | ||
| return false; | ||
| } | ||
| } catch (Exception e) { | ||
| logger.atWarning().withCause(e).log( | ||
| "An error occurred in headersContainsSuccessfulLoginElements"); | ||
| return false; | ||
| } | ||
| } | ||
| } |
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