Ban setuid or setgid tcpdump on devices.
Disallow a setuid or setgid tcpdump from appearing on devices.
tcpdump can be used by programs to monitor all traffic into and out
of the phone, potentially compromising private data.
Change-Id: Icb59d1382984138929d66e19f84659e13ee6093c
diff --git a/tests/tests/security/src/android/security/cts/BannedFilesTest.java b/tests/tests/security/src/android/security/cts/BannedFilesTest.java
new file mode 100644
index 0000000..7a9c761
--- /dev/null
+++ b/tests/tests/security/src/android/security/cts/BannedFilesTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed 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 android.security.cts;
+
+import android.os.cts.FileUtils;
+
+import junit.framework.TestCase;
+
+public class BannedFilesTest extends TestCase {
+
+ /**
+ * setuid or setgid tcpdump can be used maliciously to monitor
+ * all traffic in and out of the device.
+ */
+ public void testNoSetuidTcpdump() {
+ assertNotSetugid("/system/bin/tcpdump");
+ assertNotSetugid("/system/bin/tcpdump-arm");
+ assertNotSetugid("/system/xbin/tcpdump");
+ assertNotSetugid("/system/xbin/tcpdump-arm");
+ }
+
+ private static void assertNotSetugid(String file) {
+ FileUtils.FileStatus fs = new FileUtils.FileStatus();
+ if (!FileUtils.getFileStatus(file, fs, false)) {
+ return;
+ }
+ assertTrue((fs.mode & FileUtils.S_ISUID) == 0);
+ assertTrue((fs.mode & FileUtils.S_ISGID) == 0);
+ }
+}
