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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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test/jdk/java/net/ProxySelector/LoopbackAddresses.java Normal file
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/*
* Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4924226
* @key intermittent
* @summary PIT: Can no launch jnlp application via 127.0.0.1 address on the web server.
* This test might fail intermittently as it needs a server that
* binds to the wildcard address.
* @library /test/lib
* @compile LoopbackAddresses.java
* @run main/othervm LoopbackAddresses
*/
import java.io.IOException;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.concurrent.Executors;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import jdk.test.lib.net.URIBuilder;
/**
* Our default proxy selector should bypass localhost and loopback
* addresses when selecting proxies. This is the existing behaviour.
*/
public class LoopbackAddresses {
static HttpServer server;
public static void main(String[] args) {
try {
InetAddress loopback = InetAddress.getLoopbackAddress();
// This server needs to bind to the wildcard address as we want it
// to answer both for the loopback and "localhost".
// Though "localhost" usually point to the loopback there is no
// hard guarantee.
server = HttpServer.create(new InetSocketAddress(loopback, 0), 10, "/", new LoopbackAddressesHandler());
server.setExecutor(Executors.newSingleThreadExecutor());
server.start();
ProxyServer pserver = new ProxyServer(InetAddress.getByName("localhost"), server.getAddress().getPort());
// start proxy server
new Thread(pserver).start();
System.setProperty("http.proxyHost", loopback.getHostAddress());
System.setProperty("http.proxyPort", pserver.getPort()+"");
URL url = new URL("http://localhost:"+server.getAddress().getPort());
try {
HttpURLConnection urlc = (HttpURLConnection)url.openConnection ();
int respCode = urlc.getResponseCode();
urlc.disconnect();
} catch (IOException ioex) {
throw new RuntimeException("direct connection should succeed :"+ioex.getMessage());
}
try {
url = URIBuilder.newBuilder()
.scheme("http")
.host(loopback.getHostAddress())
.port(server.getAddress().getPort())
.toURL();
HttpURLConnection urlc = (HttpURLConnection)url.openConnection ();
int respCode = urlc.getResponseCode();
urlc.disconnect();
} catch (IOException ioex) {
throw new RuntimeException("direct connection should succeed :"+ioex.getMessage());
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
if (server != null) {
server.stop(1);
}
}
}
private static class ProxyServer extends Thread {
private static ServerSocket ss = null;
// client requesting for a tunnel
private Socket clientSocket = null;
/*
* Origin server's address and port that the client
* wants to establish the tunnel for communication. */
private InetAddress serverInetAddr;
private int serverPort;
public ProxyServer(InetAddress server, int port) throws IOException {
serverInetAddr = server;
serverPort = port;
ss = new ServerSocket();
ss.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
}
public void run() {
try {
clientSocket = ss.accept();
throw new RuntimeException("loopback addresses shouldn't go through the proxy "+clientSocket);
} catch (IOException e) {
System.out.println("Proxy Failed: " + e);
e.printStackTrace();
} finally {
try {
ss.close();
}
catch (IOException excep) {
System.out.println("ProxyServer close error: " + excep);
excep.printStackTrace();
}
}
}
/**
***************************************************************
* helper methods follow
***************************************************************
*/
public int getPort() {
return ss.getLocalPort();
}
}
}
class LoopbackAddressesHandler implements HttpHandler {
@Override
public void handle(HttpExchange exchange) throws IOException {
try {
exchange.sendResponseHeaders(200, 0);
} catch (IOException e) {
e.printStackTrace();
}
try(PrintWriter pw = new PrintWriter(exchange.getResponseBody(), false, Charset.forName("UTF-8"))) {
pw.print("Hello .");
}
}
}