Disable http trace method in jetty (#369)

carapace-server/src/main/java/org/carapaceproxy/core/HttpProxyServer.java

@@ -20,7 +20,9 @@
 package org.carapaceproxy.core;
 
 import com.google.common.annotations.VisibleForTesting;
+import io.netty.handler.codec.http.HttpMethod;
 import io.prometheus.client.exporter.MetricsServlet;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.lang.reflect.InvocationTargetException;
@@ -38,6 +40,7 @@
 import java.util.logging.Logger;
 import javax.naming.ConfigurationException;
 import javax.servlet.DispatcherType;
+
 import org.apache.bookkeeper.stats.*;
 import org.apache.commons.configuration.PropertiesConfiguration;
 import org.carapaceproxy.server.mapper.EndpointMapper;
@@ -47,9 +50,11 @@
 import org.carapaceproxy.cluster.GroupMembershipHandler;
 import org.carapaceproxy.cluster.impl.NullGroupMembershipHandler;
 import org.carapaceproxy.cluster.impl.ZooKeeperGroupMembershipHandler;
+
 import static org.carapaceproxy.cluster.impl.ZooKeeperGroupMembershipHandler.PROPERTY_PEER_ADMIN_SERVER_HOST;
 import static org.carapaceproxy.cluster.impl.ZooKeeperGroupMembershipHandler.PROPERTY_PEER_ADMIN_SERVER_PORT;
 import static org.carapaceproxy.cluster.impl.ZooKeeperGroupMembershipHandler.PROPERTY_PEER_ADMIN_SERVER_HTTPS_PORT;
+
 import org.carapaceproxy.configstore.CertificateData;
 import org.carapaceproxy.configstore.ConfigurationStore;
 import org.carapaceproxy.configstore.HerdDBConfigurationStore;
@@ -62,23 +67,23 @@
 import org.carapaceproxy.server.config.NetworkListenerConfiguration;
 import org.carapaceproxy.server.config.RequestFilterConfiguration;
 import org.carapaceproxy.server.config.SSLCertificateConfiguration;
+
 import static org.carapaceproxy.server.filters.RequestFilterFactory.buildRequestFilter;
+
 import org.carapaceproxy.user.SimpleUserRealm;
 import org.carapaceproxy.user.UserRealm;
-import org.eclipse.jetty.server.HttpConfiguration;
-import org.eclipse.jetty.server.HttpConnectionFactory;
-import org.eclipse.jetty.server.NCSARequestLog;
-import org.eclipse.jetty.server.SecureRequestCustomizer;
-import org.eclipse.jetty.server.Server;
-import org.eclipse.jetty.server.ServerConnector;
-import org.eclipse.jetty.server.SslConnectionFactory;
+import org.eclipse.jetty.security.ConstraintMapping;
+import org.eclipse.jetty.security.ConstraintSecurityHandler;
+import org.eclipse.jetty.server.*;
 import org.eclipse.jetty.server.handler.ContextHandlerCollection;
 import org.eclipse.jetty.server.handler.RequestLogHandler;
 import org.eclipse.jetty.servlet.ServletContextHandler;
 import org.eclipse.jetty.servlet.ServletHolder;
+import org.eclipse.jetty.util.security.Constraint;
 import org.eclipse.jetty.util.ssl.SslContextFactory;
 import org.eclipse.jetty.webapp.WebAppContext;
 import org.glassfish.jersey.servlet.ServletContainer;
+
 import static org.glassfish.jersey.servlet.ServletProperties.JAXRS_APPLICATION_CLASS;
 import static reactor.netty.Metrics.ACTIVE_CONNECTIONS;
 import static reactor.netty.Metrics.CONNECTION_PROVIDER_PREFIX;
@@ -87,15 +92,18 @@
 import static reactor.netty.Metrics.PENDING_CONNECTIONS;
 import static reactor.netty.Metrics.REMOTE_ADDRESS;
 import static reactor.netty.Metrics.TOTAL_CONNECTIONS;
+
 import io.micrometer.core.instrument.Measurement;
 import io.micrometer.core.instrument.Meter;
 import io.micrometer.core.instrument.Metrics;
 import io.micrometer.core.instrument.config.MeterFilter;
 import io.micrometer.prometheus.PrometheusConfig;
 import io.micrometer.prometheus.PrometheusMeterRegistry;
 import io.micrometer.prometheus.PrometheusRenameFilter;
+
 import java.util.Collections;
 import java.util.Objects;
+
 import lombok.Data;
 import lombok.Getter;
 import lombok.Setter;
@@ -301,7 +309,7 @@ public void startAdminInterface() throws Exception {
         }
 
         ContextHandlerCollection contexts = new ContextHandlerCollection();
-        adminserver.setHandler(contexts);
+        adminserver.setHandler(constrainTraceMethod(contexts));
 
         File webUi = new File(basePath, "web/ui");
         if (webUi.isDirectory()) {
@@ -366,6 +374,34 @@ public void startAdminInterface() throws Exception {
 
     }
 
+    /**
+     * Add constrain to disable http TRACE method
+     *
+     * @param handler
+     */
+    private Handler constrainTraceMethod(Handler handler) {
+        Constraint constraint = new Constraint();
+        constraint.setAuthenticate(true);
+
+        ConstraintMapping constraintMapping = new ConstraintMapping();
+        constraintMapping.setConstraint(constraint);
+        constraintMapping.setMethod(String.valueOf(HttpMethod.TRACE));
+        constraintMapping.setPathSpec("/*");
+
+        Constraint omissionConstraint = new Constraint();
+        ConstraintMapping omissionMapping = new ConstraintMapping();
+        omissionMapping.setConstraint(omissionConstraint);
+        omissionMapping.setMethod("*");
+        omissionMapping.setPathSpec("/");
+
+        ConstraintSecurityHandler securityHandler = new ConstraintSecurityHandler();
+        securityHandler.addConstraintMapping(constraintMapping);
+        securityHandler.addConstraintMapping(omissionMapping);
+
+        securityHandler.setHandler(handler);
+        return securityHandler;
+    }
+
     public void start() throws InterruptedException, ConfigurationNotValidException {
         try {
             started = true;

carapace-server/src/test/java/org/carapaceproxy/core/JettyHttpTraceMethodTest.java

@@ -0,0 +1,25 @@
+package org.carapaceproxy.core;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.carapaceproxy.api.UseAdminServer;
+import org.junit.Test;
+
+import javax.servlet.http.HttpServletResponse;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import static org.junit.Assert.assertEquals;
+
+public class JettyHttpTraceMethodTest extends UseAdminServer {
+
+    @Test
+    public void httpTraceMethodTest() throws Exception {
+        startAdmin();
+        String URL = "http://localhost:8761";
+        URL url = new URL(URL);
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod(String.valueOf(HttpMethod.TRACE));
+        int code = conn.getResponseCode();
+        assertEquals(HttpServletResponse.SC_FORBIDDEN, code);
+    }
+}