fix: crash when analyzing node package with a local dependency

core/src/main/java/org/owasp/dependencycheck/analyzer/NodePackageAnalyzer.java

@@ -386,6 +386,13 @@ private void processDependencies(JsonObject json, File baseDir, File rootFile,
 
                 if (entry.getValue() instanceof JsonObject) {
                     jo = (JsonObject) entry.getValue();
+
+                    // Ignore/skip linked entries (as they don't have "version" and
+                    // later logic will crash)
+                    if (jo.getBoolean("link", false)) {
+                        continue;
+                    }
+
                     version = jo.getString("version");
                     optional = jo.getBoolean("optional", false);
                     isDev = jo.getBoolean("dev", false);

core/src/test/java/org/owasp/dependencycheck/analyzer/NodePackageAnalyzerTest.java

@@ -309,4 +309,26 @@ public void testPackageLockV3() throws AnalysisException, InvalidSettingExceptio
         analyzer.analyze(packageLockJson, engine);
         assertEquals("Expected 1 dependencies", 6, engine.getDependencies().length);
     }
+
+    /**
+     * Test of analysis of package with a local package as a dependency.
+     *
+     * This test crashes with an NPE if issue #1947 isn't resolved.
+     *
+     * @throws AnalysisException if there was a problem with the analysis
+     */
+    @Test
+    public void testLocalPackageDependency() throws AnalysisException, InvalidSettingException {
+        Assume.assumeThat(getSettings().getBoolean(Settings.KEYS.ANALYZER_NODE_PACKAGE_ENABLED), is(true));
+        final Dependency packageJson = new Dependency(BaseTest.getResourceAsFile(this,
+                "nodejs/local_package/package.json"));
+        final Dependency packageLockJson = new Dependency(BaseTest.getResourceAsFile(this,
+                "nodejs/local_package/package-lock.json"));
+        engine.addDependency(packageJson);
+        engine.addDependency(packageLockJson);
+        analyzer.analyze(packageJson, engine);
+        assertEquals("Expected 1 dependencies", 1, engine.getDependencies().length);
+        analyzer.analyze(packageLockJson, engine);
+        assertEquals("Expected 2 dependencies", 2, engine.getDependencies().length);
+    }
 }

core/src/test/resources/nodejs/local_package/mypackage/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "mypackage",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+  }
+}

core/src/test/resources/nodejs/local_package/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "local_package",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "mypackage": "file:./mypackage"
+  }
+}