RH718164, CVE-2011-2513: Home directory path disclosure to untrusted applications

1 files changed, 157 insertions, 0 deletions

diff --git a/netx/net/sourceforge/jnlp/runtime/CachedJarFileCallback.java b/netx/net/sourceforge/jnlp/runtime/CachedJarFileCallback.java
new file mode 100644
index 0000000..ca3f4be
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+++ b/netx/net/sourceforge/jnlp/runtime/CachedJarFileCallback.java
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+/* CachedJarFileCallback.java
+   Copyright (C) 2011 Red Hat, Inc.
+   Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 2.
+
+IcedTea 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.
+*/
+
+package net.sourceforge.jnlp.runtime;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.jar.JarFile;
+
+import net.sourceforge.jnlp.util.UrlUtils;
+
+import sun.net.www.protocol.jar.URLJarFile;
+import sun.net.www.protocol.jar.URLJarFileCallBack;
+
+/**
+ * Invoked by URLJarFile to get a JarFile corresponding to a URL.
+ *
+ * Large parts of this class are based on JarFileFactory and URLJarFile.
+ */
+final class CachedJarFileCallback implements URLJarFileCallBack {
+
+    private static final CachedJarFileCallback INSTANCE = new CachedJarFileCallback();
+
+    public synchronized static CachedJarFileCallback getInstance() {
+        return INSTANCE;
+    }
+
+    /* our managed cache */
+    private final Map<URL, URL> mapping;
+
+    private CachedJarFileCallback() {
+        mapping = new ConcurrentHashMap<URL, URL>();
+    }
+
+    protected void addMapping(URL remoteUrl, URL localUrl) {
+        mapping.put(remoteUrl, localUrl);
+    }
+
+    @Override
+    public JarFile retrieve(URL url) throws IOException {
+        URL localUrl = mapping.get(url);
+
+        if (localUrl == null) {
+            /*
+             * If the jar url is not known, treat it as it would be treated in
+             * general by URLJarFile.
+             */
+            return cacheJarFile(url);
+        }
+
+        if (UrlUtils.isLocalFile(localUrl)) {
+            // if it is known to us, just return the cached file
+            return new JarFile(localUrl.getPath());
+        } else {
+            // throw new IllegalStateException("a non-local file in cache");
+            return null;
+        }
+
+    }
+
+    /*
+     * This method is a copy of URLJarFile.retrieve() without the callback check.
+     */
+    private JarFile cacheJarFile(URL url) throws IOException {
+        JarFile result = null;
+
+        final int BUF_SIZE = 2048;
+
+        /* get the stream before asserting privileges */
+        final InputStream in = url.openConnection().getInputStream();
+
+        try {
+            result =
+                    AccessController.doPrivileged(new PrivilegedExceptionAction<JarFile>() {
+                        @Override
+                        public JarFile run() throws IOException {
+                            OutputStream out = null;
+                            File tmpFile = null;
+                            try {
+                                tmpFile = File.createTempFile("jar_cache", null);
+                                tmpFile.deleteOnExit();
+                                out = new FileOutputStream(tmpFile);
+                                int read = 0;
+                                byte[] buf = new byte[BUF_SIZE];
+                                while ((read = in.read(buf)) != -1) {
+                                    out.write(buf, 0, read);
+                                }
+                                out.close();
+                                out = null;
+                                return new URLJarFile(tmpFile, null);
+                            } catch (IOException e) {
+                                if (tmpFile != null) {
+                                    tmpFile.delete();
+                                }
+                                throw e;
+                            } finally {
+                                if (in != null) {
+                                    in.close();
+                                }
+                                if (out != null) {
+                                    out.close();
+                                }
+                            }
+                        }
+                    });
+        } catch (PrivilegedActionException pae) {
+            throw (IOException) pae.getException();
+        }
+
+        return result;
+    }
+
+}