Merge "CTS test for Android Security b/200682135" into qt-dev

1 files changed, 71 insertions, 0 deletions

diff --git a/tests/tests/security/src/android/security/cts/CVE_2021_39663.java b/tests/tests/security/src/android/security/cts/CVE_2021_39663.java
new file mode 100644
index 00000000000..965deb031c3
--- /dev/null
+++ b/tests/tests/security/src/android/security/cts/CVE_2021_39663.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 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 static android.system.OsConstants.F_GETFL;
+import static android.system.OsConstants.O_NOFOLLOW;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assume.assumeNoException;
+import static org.junit.Assume.assumeNotNull;
+import static org.junit.Assume.assumeTrue;
+
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.platform.test.annotations.AppModeFull;
+import android.platform.test.annotations.AsbSecurityTest;
+import android.provider.MediaStore;
+import android.system.ErrnoException;
+import android.system.Os;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+@AppModeFull
+@RunWith(AndroidJUnit4.class)
+public class CVE_2021_39663 {
+
+    @Test
+    @AsbSecurityTest(cveBugId = 200682135)
+    public void testPocCVE_2021_39663() {
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        ContentResolver contentResolver = context.getContentResolver();
+        try {
+            Uri uri = contentResolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI,
+                    new ContentValues());
+            ParcelFileDescriptor pfd = context.getContentResolver().openFileDescriptor(uri, "rw");
+            assumeNotNull(pfd);
+            FileDescriptor fd = pfd.getFileDescriptor();
+            int flags = Os.fcntlInt(fd, F_GETFL, 0);
+            pfd.close();
+            contentResolver.delete(uri, null, null);
+            assumeTrue("Unable to read file status flags", flags > 0);
+            assertEquals("Vulnerable to b/200682135!! O_NOFOLLOW flag not used.", O_NOFOLLOW,
+                    flags & O_NOFOLLOW);
+        } catch (ErrnoException | IOException e) {
+            assumeNoException(e);
+        }
+    }
+}