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/awt/Headless/HeadlessMalfunctionAgent.java
+++ b/test/jdk/java/awt/Headless/HeadlessMalfunctionAgent.java
@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2024, 2025, 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.
+ */
+
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.MethodModel;
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.Instrumentation;
+import java.security.ProtectionDomain;
+
+/**
+ * This agent removes the isHeadless method from java.awt.GraphicsEnvironment.
+ */
+public class HeadlessMalfunctionAgent {
+
+    public static void premain(String agentArgs, Instrumentation inst) {
+        inst.addTransformer(new ClassFileTransformer() {
+            @Override
+            public byte[] transform(ClassLoader loader,
+                                    String className,
+                                    Class<?> classBeingRedefined,
+                                    ProtectionDomain pd,
+                                    byte[] cb) {
+                if (!"java/awt/GraphicsEnvironment".equals(className)) {
+                    return null;
+                }
+                System.out.println("Transforming java.awt.GraphicsEnvironment.");
+                try {
+                    return ClassFile.of().transformClass(ClassFile.of().parse(cb), (classBuilder, element) -> {
+                        if (element instanceof MethodModel method) {
+                            if ("isHeadless".equals(method.methodName().stringValue()) &&
+                                    "()Z".equals(method.methodType().stringValue())) {
+                                System.out.println("isHeadless removed from java.awt.GraphicsEnvironment.");
+                                return;
+                            }
+                        }
+                        classBuilder.with(element);
+                    });
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    return null;
+                }
+            }
+        });
+    }
+}