Add a unit test for CVE-2019-0221

Author: dsoumis

test/org/apache/tomcat/security/TestSecurity2019.java

@@ -0,0 +1,108 @@
+/*
+ * 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.tomcat.security;
+
+import java.io.File;
+import java.io.FileWriter;
+
+import jakarta.servlet.http.HttpServletResponse;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.apache.catalina.Context;
+import org.apache.catalina.servlets.DefaultServlet;
+import org.apache.catalina.ssi.SSIFilter;
+import org.apache.catalina.ssi.SSIServlet;
+import org.apache.catalina.startup.Tomcat;
+import org.apache.catalina.startup.TomcatBaseTest;
+import org.apache.tomcat.util.buf.ByteChunk;
+import org.apache.tomcat.util.descriptor.web.FilterDef;
+import org.apache.tomcat.util.descriptor.web.FilterMap;
+
+public class TestSecurity2019 extends TomcatBaseTest {
+
+    // https://www.cve.org/CVERecord?id=CVE-2019-0221
+    @Test
+    public void testCVE_2019_0221_01() throws Exception {
+        Tomcat tomcat = getTomcatInstance();
+
+        File appDir = new File(getTemporaryDirectory(), "ssitest");
+        Assert.assertTrue(appDir.mkdirs());
+        addDeleteOnTearDown(appDir);
+
+        File shtml = new File(appDir, "printenv.shtml");
+        try (FileWriter fw = new FileWriter(shtml)) {
+            fw.write("<!--#printenv -->");
+        }
+
+        Context ctx = tomcat.addContext("", appDir.getAbsolutePath());
+
+        Tomcat.addServlet(ctx, "ssi", new SSIServlet());
+        ctx.addServletMappingDecoded("*.shtml", "ssi");
+
+        ctx.setPrivileged(true);
+
+        tomcat.start();
+
+        ByteChunk res = new ByteChunk();
+        int rc = getUrl("http://localhost:" + getPort() + "/printenv.shtml?%3Ch1%3EXSS%3C/h1%3E", res, null);
+        Assert.assertEquals(HttpServletResponse.SC_OK, rc);
+        Assert.assertFalse("SSI printenv should not render unescaped HTML ", res.toString().contains("<h1>"));
+
+    }
+
+    @Test
+    public void testCVE_2019_0221_02() throws Exception {
+        Tomcat tomcat = getTomcatInstance();
+
+        File appDir = new File(getTemporaryDirectory(), "ssitest");
+        Assert.assertTrue(appDir.mkdirs());
+        addDeleteOnTearDown(appDir);
+
+        File shtml = new File(appDir, "printenv.shtml");
+        try (FileWriter fw = new FileWriter(shtml)) {
+            fw.write("<!--#printenv -->");
+        }
+
+        Context ctx = tomcat.addContext("", appDir.getAbsolutePath());
+
+        FilterDef filterDef = new FilterDef();
+        filterDef.setFilterClass(SSIFilter.class.getName());
+        filterDef.setFilterName("ssi");
+        ctx.addFilterDef(filterDef);
+
+        FilterMap filterMap = new FilterMap();
+        filterMap.setFilterName("ssi");
+        filterMap.addURLPatternDecoded("*.shtml");
+        ctx.addFilterMap(filterMap);
+
+        Tomcat.addServlet(ctx, "default", new DefaultServlet());
+        ctx.addServletMappingDecoded("/", "default");
+        ctx.addMimeMapping("shtml", "text/x-server-parsed-html");
+
+        ctx.setPrivileged(true);
+
+        tomcat.start();
+
+        ByteChunk res = new ByteChunk();
+        int rc = getUrl("http://localhost:" + getPort() + "/printenv.shtml?%3Ch1%3EXSS%3C/h1%3E", res, null);
+        Assert.assertEquals(HttpServletResponse.SC_OK, rc);
+        Assert.assertFalse("SSI printenv should not render unescaped HTML ", res.toString().contains("<h1>"));
+    }
+}