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Check DISALLOW_APPS_CONTROL before performing reset app preferences

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When DISALLOW_APPS_CONTROL restriction is enabled, users should not be
able to enable/disable apps, clear app caches and clear app data.

The function of reset app preferences will re-enable the disabled apps,
it can let users bypass DISALLOW_APPS_CONTROL to enable an app disabled
by IT admin to see sensitive information.

To fix this vulnerability, we add a check for DISALLOW_APPS_CONTROL
restriction before users reset app preferences. Once the restriction is
enabled, it will show dialog “Blocked by your IT admin” instead.

Bug: 238745070
Test: Verify change by turning on/off DISALLOW_APPS_CONTROL with TestDPC.
Change-Id: Iffee73cf4952b686a78b4c7aaa54747971337d03
(cherry picked from commit 4356c9c653)
This commit is contained in:
Yanting Yang
2022-08-03 02:02:10 +08:00
parent 0077129094
commit ea6a06c8e8
1 changed files with 14 additions and 1 deletions
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13
src/com/android/settings/applications/manageapplications/ManageApplications.java
View File

@@ -126,6 +126,8 @@ import com.android.settings.notification.app.AppNotificationSettings;
import com.android.settings.widget.LoadingViewController; import com.android.settings.widget.LoadingViewController;
import com.android.settings.wifi.AppStateChangeWifiStateBridge; import com.android.settings.wifi.AppStateChangeWifiStateBridge;
import com.android.settings.wifi.ChangeWifiStateDetails; import com.android.settings.wifi.ChangeWifiStateDetails;
import com.android.settingslib.RestrictedLockUtils;
import com.android.settingslib.RestrictedLockUtilsInternal;
import com.android.settingslib.applications.AppIconCacheManager; import com.android.settingslib.applications.AppIconCacheManager;
import com.android.settingslib.applications.AppUtils; import com.android.settingslib.applications.AppUtils;
import com.android.settingslib.applications.ApplicationsState; import com.android.settingslib.applications.ApplicationsState;
@@ -776,7 +778,18 @@ public class ManageApplications extends InstrumentedFragment
mShowSystem = !mShowSystem; mShowSystem = !mShowSystem;
mApplications.rebuild(); mApplications.rebuild();
} else if (i == R.id.reset_app_preferences) { } else if (i == R.id.reset_app_preferences) {
final boolean appsControlDisallowedBySystem =
RestrictedLockUtilsInternal.hasBaseUserRestriction(getActivity(),
UserManager.DISALLOW_APPS_CONTROL, UserHandle.myUserId());
final RestrictedLockUtils.EnforcedAdmin appsControlDisallowedAdmin =
RestrictedLockUtilsInternal.checkIfRestrictionEnforced(getActivity(),
UserManager.DISALLOW_APPS_CONTROL, UserHandle.myUserId());
if (appsControlDisallowedAdmin != null && !appsControlDisallowedBySystem) {
RestrictedLockUtils.sendShowAdminSupportDetailsIntent(
getActivity(), appsControlDisallowedAdmin);
} else {
mResetAppsHelper.buildResetDialog(); mResetAppsHelper.buildResetDialog();
}
return true; return true;
} else if (i == R.id.advanced) { } else if (i == R.id.advanced) {
if (mListType == LIST_TYPE_NOTIFICATION) { if (mListType == LIST_TYPE_NOTIFICATION) {