mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-27 00:19:26 -05:00
86 lines
4.3 KiB
Diff
86 lines
4.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Edgar Wang <edgarwang@google.com>
|
|
Date: Thu, 6 Jan 2022 20:53:48 +0800
|
|
Subject: [PATCH] Fix bypass CALL_PRIVILEGED permission in
|
|
AppRestrictionsFragment
|
|
|
|
In onReceive of AppRestrictionsFragment.java, there is a possible way to
|
|
start a phone call without permissions due to a confused deputy.
|
|
This could lead to local escalation of privilege with no additional
|
|
execution privileges needed.
|
|
|
|
We should not allow the restrictionsIntent to startActivity simply
|
|
because it resolves to multiple activities.
|
|
Instead, we should call resolveActivity and check the result's package
|
|
name is same as current package name, then it is safe to startActivity.
|
|
|
|
Bug: 200688991
|
|
Test: manual verify
|
|
Change-Id: Iaa2d3a9497c3266babe0789961befc9776a4db7a
|
|
Merged-In: Iaa2d3a9497c3266babe0789961befc9776a4db7a
|
|
(cherry picked from commit 359512cd9553c940af3c9045b856647b7529731a)
|
|
(cherry picked from commit f57d75f127fe96e91250585208a339763f1a2253)
|
|
Merged-In:Iaa2d3a9497c3266babe0789961befc9776a4db7a
|
|
---
|
|
.../users/AppRestrictionsFragment.java | 24 +++++++++++++------
|
|
1 file changed, 17 insertions(+), 7 deletions(-)
|
|
|
|
diff --git a/src/com/android/settings/users/AppRestrictionsFragment.java b/src/com/android/settings/users/AppRestrictionsFragment.java
|
|
index f72bf9e97bf..ee2114219e7 100644
|
|
--- a/src/com/android/settings/users/AppRestrictionsFragment.java
|
|
+++ b/src/com/android/settings/users/AppRestrictionsFragment.java
|
|
@@ -17,6 +17,7 @@
|
|
package com.android.settings.users;
|
|
|
|
import android.app.Activity;
|
|
+import android.content.ActivityNotFoundException;
|
|
import android.content.BroadcastReceiver;
|
|
import android.content.Context;
|
|
import android.content.Intent;
|
|
@@ -44,6 +45,7 @@ import android.support.v7.preference.Preference.OnPreferenceChangeListener;
|
|
import android.support.v7.preference.Preference.OnPreferenceClickListener;
|
|
import android.support.v7.preference.PreferenceGroup;
|
|
import android.support.v7.preference.PreferenceViewHolder;
|
|
+import android.util.EventLog;
|
|
import android.util.Log;
|
|
import android.view.View;
|
|
import android.view.View.OnClickListener;
|
|
@@ -634,7 +636,15 @@ public class AppRestrictionsFragment extends SettingsPreferenceFragment implemen
|
|
} else if (restrictionsIntent != null) {
|
|
preference.setRestrictions(restrictions);
|
|
if (invokeIfCustom && AppRestrictionsFragment.this.isResumed()) {
|
|
- assertSafeToStartCustomActivity(restrictionsIntent);
|
|
+ try {
|
|
+ assertSafeToStartCustomActivity(restrictionsIntent);
|
|
+ } catch (ActivityNotFoundException | SecurityException e) {
|
|
+ // return without startActivity
|
|
+ Log.e(TAG, "Cannot start restrictionsIntent " + e);
|
|
+ EventLog.writeEvent(0x534e4554, "200688991", -1 /* UID */, "");
|
|
+ return;
|
|
+ }
|
|
+
|
|
int requestCode = generateCustomActivityRequestCode(
|
|
RestrictionsResultReceiver.this.preference);
|
|
AppRestrictionsFragment.this.startActivityForResult(
|
|
@@ -648,14 +658,14 @@ public class AppRestrictionsFragment extends SettingsPreferenceFragment implemen
|
|
if (intent.getPackage() != null && intent.getPackage().equals(packageName)) {
|
|
return;
|
|
}
|
|
- // Activity can be started if intent resolves to multiple activities
|
|
- List<ResolveInfo> resolveInfos = AppRestrictionsFragment.this.mPackageManager
|
|
- .queryIntentActivities(intent, 0 /* no flags */);
|
|
- if (resolveInfos.size() != 1) {
|
|
- return;
|
|
+ ResolveInfo resolveInfo = mPackageManager.resolveActivity(
|
|
+ intent, PackageManager.MATCH_DEFAULT_ONLY);
|
|
+
|
|
+ if (resolveInfo == null) {
|
|
+ throw new ActivityNotFoundException("No result for resolving " + intent);
|
|
}
|
|
// Prevent potential privilege escalation
|
|
- ActivityInfo activityInfo = resolveInfos.get(0).activityInfo;
|
|
+ ActivityInfo activityInfo = resolveInfo.activityInfo;
|
|
if (!packageName.equals(activityInfo.packageName)) {
|
|
throw new SecurityException("Application " + packageName
|
|
+ " is not allowed to start activity " + intent);
|