| Alex Klyubin | fce60d3 | 2017-01-05 12:27:10 -0800 | [diff] [blame] | 1 | ### |
| 2 | ### Untrusted apps. |
| 3 | ### |
| 4 | ### This file defines the rules for untrusted apps. |
| 5 | ### Apps are labeled based on mac_permissions.xml (maps signer and |
| 6 | ### optionally package name to seinfo value) and seapp_contexts (maps UID |
| 7 | ### and optionally seinfo value to domain for process and type for data |
| 8 | ### directory). The untrusted_app domain is the default assignment in |
| 9 | ### seapp_contexts for any app with UID between APP_AID (10000) |
| 10 | ### and AID_ISOLATED_START (99000) if the app has no specific seinfo |
| 11 | ### value as determined from mac_permissions.xml. In current AOSP, this |
| 12 | ### domain is assigned to all non-system apps as well as to any system apps |
| 13 | ### that are not signed by the platform key. To move |
| 14 | ### a system app into a specific domain, add a signer entry for it to |
| 15 | ### mac_permissions.xml and assign it one of the pre-existing seinfo values |
| 16 | ### or define and use a new seinfo value in both mac_permissions.xml and |
| 17 | ### seapp_contexts. |
| 18 | ### |
| 19 | |
| dcashman | 3e8dbf0 | 2016-12-08 11:23:34 -0800 | [diff] [blame] | 20 | app_domain(untrusted_app) |
| Alex Klyubin | fce60d3 | 2017-01-05 12:27:10 -0800 | [diff] [blame] | 21 | net_domain(untrusted_app) |
| 22 | bluetooth_domain(untrusted_app) |
| dcashman | 2e00e63 | 2016-10-12 14:58:09 -0700 | [diff] [blame] | 23 | |
| 24 | # Allow the allocation and use of ptys |
| 25 | # Used by: https://play.google.com/store/apps/details?id=jackpal.androidterm |
| 26 | create_pty(untrusted_app) |
| Alex Klyubin | fce60d3 | 2017-01-05 12:27:10 -0800 | [diff] [blame] | 27 | |
| 28 | # Legacy text relocations |
| 29 | allow untrusted_app apk_data_file:file execmod; |
| 30 | |
| 31 | # Some apps ship with shared libraries and binaries that they write out |
| 32 | # to their sandbox directory and then execute. |
| 33 | allow untrusted_app app_data_file:file { rx_file_perms execmod }; |
| 34 | |
| 35 | # ASEC |
| 36 | allow untrusted_app asec_apk_file:file r_file_perms; |
| 37 | allow untrusted_app asec_apk_file:dir r_dir_perms; |
| 38 | # Execute libs in asec containers. |
| 39 | allow untrusted_app asec_public_file:file { execute execmod }; |
| 40 | |
| 41 | # Used by Finsky / Android "Verify Apps" functionality when |
| 42 | # running "adb install foo.apk". |
| 43 | # TODO: Long term, we don't want apps probing into shell data files. |
| 44 | # Figure out a way to remove these rules. |
| 45 | allow untrusted_app shell_data_file:file r_file_perms; |
| 46 | allow untrusted_app shell_data_file:dir r_dir_perms; |
| 47 | |
| 48 | # Read and write system app data files passed over Binder. |
| 49 | # Motivating case was /data/data/com.android.settings/cache/*.jpg for |
| 50 | # cropping or taking user photos. |
| 51 | allow untrusted_app system_app_data_file:file { read write getattr }; |
| 52 | |
| 53 | # |
| 54 | # Rules migrated from old app domains coalesced into untrusted_app. |
| 55 | # This includes what used to be media_app, shared_app, and release_app. |
| 56 | # |
| 57 | |
| 58 | # Access to /data/media. |
| 59 | allow untrusted_app media_rw_data_file:dir create_dir_perms; |
| 60 | allow untrusted_app media_rw_data_file:file create_file_perms; |
| 61 | |
| 62 | # Traverse into /mnt/media_rw for bypassing FUSE daemon |
| 63 | # TODO: narrow this to just MediaProvider |
| 64 | allow untrusted_app mnt_media_rw_file:dir search; |
| 65 | |
| 66 | # allow cts to query all services |
| 67 | allow untrusted_app servicemanager:service_manager list; |
| 68 | |
| 69 | allow untrusted_app audioserver_service:service_manager find; |
| 70 | allow untrusted_app cameraserver_service:service_manager find; |
| 71 | allow untrusted_app drmserver_service:service_manager find; |
| 72 | allow untrusted_app mediaserver_service:service_manager find; |
| 73 | allow untrusted_app mediaextractor_service:service_manager find; |
| 74 | allow untrusted_app mediacodec_service:service_manager find; |
| Ray Essick | 3918540 | 2017-01-24 12:53:45 -0800 | [diff] [blame] | 75 | allow untrusted_app mediametrics_service:service_manager find; |
| Alex Klyubin | fce60d3 | 2017-01-05 12:27:10 -0800 | [diff] [blame] | 76 | allow untrusted_app mediadrmserver_service:service_manager find; |
| 77 | allow untrusted_app nfc_service:service_manager find; |
| 78 | allow untrusted_app radio_service:service_manager find; |
| 79 | allow untrusted_app surfaceflinger_service:service_manager find; |
| 80 | allow untrusted_app app_api_service:service_manager find; |
| 81 | |
| 82 | # Allow GMS core to access perfprofd output, which is stored |
| 83 | # in /data/misc/perfprofd/. GMS core will need to list all |
| 84 | # data stored in that directory to process them one by one. |
| 85 | userdebug_or_eng(` |
| 86 | allow untrusted_app perfprofd_data_file:file r_file_perms; |
| 87 | allow untrusted_app perfprofd_data_file:dir r_dir_perms; |
| 88 | ') |
| 89 | |
| 90 | # gdbserver for ndk-gdb ptrace attaches to app process. |
| 91 | allow untrusted_app self:process ptrace; |
| 92 | |
| 93 | # Cts: HwRngTest |
| 94 | allow untrusted_app sysfs_hwrandom:dir search; |
| 95 | allow untrusted_app sysfs_hwrandom:file r_file_perms; |
| 96 | |
| 97 | # Allow apps to view preloaded content |
| 98 | allow untrusted_app preloads_data_file:dir r_dir_perms; |
| 99 | allow untrusted_app preloads_data_file:file r_file_perms; |
| 100 | |
| 101 | # Access to /proc/tty/drivers, to allow apps to determine if they |
| 102 | # are running in an emulated environment. |
| 103 | # b/33214085 b/33814662 b/33791054 b/33211769 |
| 104 | # https://github.com/strazzere/anti-emulator/blob/master/AntiEmulator/src/diff/strazzere/anti/emulator/FindEmulator.java |
| 105 | allow untrusted_app proc_tty_drivers:file r_file_perms; |