Merge "Ensure calling package name and uid are matched" into sc-qpr1-dev am: e93efb6f96
Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/15618365
Change-Id: Ia3c730176ac21b90c2b44ad1cd56304d6b85ac4f
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index e34c064..418e9e3 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -2361,6 +2361,26 @@
return false;
}
+ private int getAppUid(final String app, final UserHandle user) {
+ final PackageManager pm =
+ mContext.createContextAsUser(user, 0 /* flags */).getPackageManager();
+ final long token = Binder.clearCallingIdentity();
+ try {
+ return pm.getPackageUid(app, 0 /* flags */);
+ } catch (PackageManager.NameNotFoundException e) {
+ return -1;
+ } finally {
+ Binder.restoreCallingIdentity(token);
+ }
+ }
+
+ private void verifyCallingUidAndPackage(String packageName, int callingUid) {
+ final UserHandle user = UserHandle.getUserHandleForUid(callingUid);
+ if (getAppUid(packageName, user) != callingUid) {
+ throw new SecurityException(packageName + " does not belong to uid " + callingUid);
+ }
+ }
+
/**
* Ensure that a network route exists to deliver traffic to the specified
* host via the specified network interface.
@@ -2376,6 +2396,7 @@
if (disallowedBecauseSystemCaller()) {
return false;
}
+ verifyCallingUidAndPackage(callingPackageName, mDeps.getCallingUid());
enforceChangePermission(callingPackageName, callingAttributionTag);
if (mProtectedNetworks.contains(networkType)) {
enforceConnectivityRestrictedNetworksPermission();
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index 10b7e14..b900169 100644
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -13941,4 +13941,11 @@
mDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
}
+
+ @Test
+ public void testRequestRouteToHostAddress_PackageDoesNotBelongToCaller() {
+ assertThrows(SecurityException.class, () -> mService.requestRouteToHostAddress(
+ ConnectivityManager.TYPE_NONE, null /* hostAddress */, "com.not.package.owner",
+ null /* callingAttributionTag */));
+ }
}