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

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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/net/URLConnection/HttpContinueStackOverflow.java
+++ b/test/jdk/java/net/URLConnection/HttpContinueStackOverflow.java
@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2000, 2019, 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 4258697
+ * @library /test/lib
+ * @summary Make sure that http CONTINUE status followed by invalid
+ * response doesn't cause HttpClient to recursively loop and
+ * eventually StackOverflow.
+ *
+ */
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.URL;
+import java.net.HttpURLConnection;
+import jdk.test.lib.net.URIBuilder;
+import static java.net.Proxy.NO_PROXY;
+
+public class HttpContinueStackOverflow {
+
+    static class Server implements Runnable {
+        ServerSocket serverSock ;
+
+        Server() throws IOException {
+            serverSock = new ServerSocket(0, 0, InetAddress.getLoopbackAddress());
+        }
+
+        int getLocalPort() {
+            return serverSock.getLocalPort();
+        }
+
+        public void run() {
+            Socket sock = null;
+            try {
+                serverSock.setSoTimeout(10000);
+                sock = serverSock.accept();
+
+                /* setup streams and read http request */
+                BufferedReader in = new BufferedReader(
+                    new InputStreamReader(sock.getInputStream()));
+                PrintStream out = new PrintStream( sock.getOutputStream() );
+                in.readLine();
+
+                /* send continue followed by invalid response */
+                out.println("HTTP/1.1 100 Continue\r");
+                out.println("\r");
+                out.println("junk junk junk");
+                out.flush();
+            } catch (Exception e) {
+                e.printStackTrace();
+            } finally {
+                try { serverSock.close(); } catch (IOException unused) {}
+                try { sock.close(); } catch (IOException unused) {}
+            }
+        }
+    }
+
+    HttpContinueStackOverflow() throws Exception {
+        /* create the server */
+        Server s = new Server();
+        (new Thread(s)).start();
+
+        /* connect to server and get response code */
+        URL url = URIBuilder.newBuilder()
+                .scheme("http")
+                .loopback()
+                .port(s.getLocalPort())
+                .path("/anything.html")
+                .toURL();
+
+        HttpURLConnection conn = (HttpURLConnection)url.openConnection(NO_PROXY);
+        conn.getResponseCode();
+        System.out.println("TEST PASSED");
+    }
+
+    public static void main(String args[]) throws Exception {
+        System.out.println("Testing 100-Continue");
+        new HttpContinueStackOverflow();
+    }
+}