Dynamic (#77)

tests/dynamic_fixtures/java/static_method/Benign.java

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+// Phase 14 — plain static method, benign.
+//
+// Invokes a fixed shell command and discards the user input — the `;`
+// in a vuln payload cannot escape because the payload is never passed
+// to a shell-interpreted argv slot.
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+
+public class Benign {
+    public static void processInput(String input) throws Exception {
+        System.out.print("__NYX_SINK_HIT__\n");
+        // No-op echo of a fixed string — `input` is dropped.
+        String[] cmd = {"/bin/sh", "-c", "echo hello"};
+        Process p = Runtime.getRuntime().exec(cmd);
+        BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
+        String line;
+        while ((line = reader.readLine()) != null) {
+            System.out.println(line);
+        }
+        p.waitFor();
+    }
+}

tests/dynamic_fixtures/java/static_method/Vuln.java

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+// Phase 14 — plain static method, vulnerable.
+//
+// JDK-only.  Passes user input through `/bin/sh -c` so a `;` in the
+// payload escapes into a new command (CMDI oracle marker fires).
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+
+public class Vuln {
+    public static void processInput(String input) throws Exception {
+        System.out.print("__NYX_SINK_HIT__\n");
+        String[] cmd = {"/bin/sh", "-c", "echo hello " + input};
+        Process p = Runtime.getRuntime().exec(cmd);
+        BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
+        String line;
+        while ((line = reader.readLine()) != null) {
+            System.out.println(line);
+        }
+        p.waitFor();
+    }
+}

tests/dynamic_fixtures/java/static_method/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Phase 14 fixture pom.xml — pins JDK 17 for materialize_java parity.
+     Not consumed by prepare_java (which shells out to `javac` directly);
+     present so the Phase 09 Track D.2 dep-emission path has a reference. -->
+<project xmlns="http://maven.apache.org/POM/4.0.0">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>nyx</groupId>
+  <artifactId>static-method-fixture</artifactId>
+  <version>0.0.1</version>
+  <properties>
+    <maven.compiler.source>17</maven.compiler.source>
+    <maven.compiler.target>17</maven.compiler.target>
+  </properties>
+</project>