WW-4432 Fixes access to javax.servlet package

core/src/main/resources/struts-default.xml

@@ -52,7 +52,7 @@
                 ognl.TypeConverter,
                 com.opensymphony.xwork2.ActionContext" />
     <!-- this must be valid regex, each '.' in package name must be escaped! -->
-    <constant name="struts.excludedPackageNamePatterns" value="^java\.lang\..*,^ognl.*,^javax.*" />
+    <constant name="struts.excludedPackageNamePatterns" value="^java\.lang\..*,^ognl.*,^(?!javax\.servlet\..+)(javax\..+)" />
 
     <bean class="com.opensymphony.xwork2.ObjectFactory" name="struts"/>
     <bean type="com.opensymphony.xwork2.factory.ResultFactory" name="struts" class="org.apache.struts2.factory.StrutsResultFactory" />

core/src/test/java/org/apache/struts2/util/SecurityMemberAccessInServletsTest.java

@@ -0,0 +1,81 @@
+/*
+ * $Id$
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.struts2.util;
+
+import com.opensymphony.xwork2.ognl.SecurityMemberAccess;
+import org.apache.struts2.StrutsInternalTestCase;
+import org.apache.struts2.TestAction;
+
+import javax.servlet.jsp.tagext.TagSupport;
+import java.lang.reflect.Member;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Pattern;
+
+public class SecurityMemberAccessInServletsTest extends StrutsInternalTestCase {
+
+    private Map context;
+
+    @Override
+    public void setUp() throws Exception {
+        context = new HashMap();
+    }
+
+    public void testJavaxServletPackageAccess() throws Exception {
+        // given
+        SecurityMemberAccess sma = new SecurityMemberAccess(false);
+
+        Set<Pattern> excluded = new HashSet<Pattern>();
+        excluded.add(Pattern.compile("^(?!javax\\.servlet\\..+)(javax\\..+)"));
+        sma.setExcludedPackageNamePatterns(excluded);
+
+        String propertyName = "value";
+        Member member = TagSupport.class.getMethod("doStartTag");
+
+        // when
+        boolean actual = sma.isAccessible(context, new TestAction(), member, propertyName);
+
+        // then
+        assertTrue("javax.servlet package isn't accessible!", actual);
+    }
+
+    public void testJavaxServletPackageExclusion() throws Exception {
+        // given
+        SecurityMemberAccess sma = new SecurityMemberAccess(false);
+
+        Set<Pattern> excluded = new HashSet<Pattern>();
+        excluded.add(Pattern.compile("^javax\\..+"));
+        sma.setExcludedPackageNamePatterns(excluded);
+
+        String propertyName = "value";
+        Member member = TagSupport.class.getMethod("doStartTag");
+
+        // when
+        boolean actual = sma.isAccessible(context, new TestAction(), member, propertyName);
+
+        // then
+        assertFalse("javax.servlet package is accessible!", actual);
+    }
+
+}