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/InterfaceAddress/NetworkPrefixLength.java
+++ b/test/jdk/java/net/InterfaceAddress/NetworkPrefixLength.java
@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2010, 2013, 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 6707289 7107883
+ * @summary InterfaceAddress.getNetworkPrefixLength() does not conform to Javadoc
+ */
+
+import java.net.InetAddress;
+import java.net.Inet4Address;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.util.Enumeration;
+import static java.lang.System.out;
+
+public class NetworkPrefixLength {
+    static boolean passed = true;
+
+    public static void main(String[] args) throws Exception {
+        Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
+
+        while (nics.hasMoreElements()) {
+            NetworkInterface nic = nics.nextElement();
+            for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
+                boolean valid = checkPrefix(iaddr);
+                if (!valid) {
+                    passed = false;
+                    debug(nic.getName(), iaddr);
+                }
+                InetAddress ia = iaddr.getAddress();
+                if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
+                    // assumption: prefix length will always be 8
+                    if (iaddr.getNetworkPrefixLength() != 8) {
+                        out.println("Expected prefix of 8, got " + iaddr);
+                        passed = false;
+                    }
+                }
+            }
+        }
+
+        if (!passed)
+            throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
+    }
+
+    static boolean checkPrefix(InterfaceAddress iaddr) {
+        InetAddress addr = iaddr.getAddress();
+
+        if (addr instanceof Inet4Address)
+            return checkIPv4PrefixLength(iaddr.getNetworkPrefixLength());
+        else
+            return checkIPv6PrefixLength(iaddr.getNetworkPrefixLength());
+    }
+
+    static boolean checkIPv4PrefixLength(int prefix) {
+        if (prefix >=0 && prefix <= 32)
+            return true;
+
+        return false;
+    }
+
+    static boolean checkIPv6PrefixLength(int prefix) {
+        if (prefix >=0 && prefix <= 128)
+            return true;
+
+        return false;
+    }
+
+    static void debug(String nicName, InterfaceAddress iaddr) {
+        out.println("NIC " + nicName + " has an address with an invalid prefix length:\n" + iaddr);
+    }
+}
+