1###
2### Untrusted_app_25
3###
4### This file defines the rules for untrusted apps running with
5### targetSdkVersion <= 25.
6###
7### See public/untrusted_app.te for more information about which apps are
8### placed in this selinux domain.
9###
10
11typeattribute untrusted_app_25 coredomain;
12
13app_domain(untrusted_app_25)
14untrusted_app_domain(untrusted_app_25)
15net_domain(untrusted_app_25)
16bluetooth_domain(untrusted_app_25)
17
18# b/35917228 - /proc/misc access
19# This will go away in a future Android release
20allow untrusted_app_25 proc_misc:file r_file_perms;
21
22# Access to /proc/tty/drivers, to allow apps to determine if they
23# are running in an emulated environment.
24# b/33214085 b/33814662 b/33791054 b/33211769
25# https://github.com/strazzere/anti-emulator/blob/master/AntiEmulator/src/diff/strazzere/anti/emulator/FindEmulator.java
26# This will go away in a future Android release
27allow untrusted_app_25 proc_tty_drivers:file r_file_perms;
28
29# Text relocation support for API < 23. This is now disallowed for targetSdkVersion>=Q.
30# https://android.googlesource.com/platform/bionic/+/master/android-changes-for-ndk-developers.md#text-relocations-enforced-for-api-level-23
31allow untrusted_app_25 { apk_data_file app_data_file asec_public_file }:file execmod;
32
33# The ability to call exec() on files in the apps home directories
34# for targetApi<=25. This is also allowed for targetAPIs 26, 27,
35# and 28 in untrusted_app_27.te.
36allow untrusted_app_25 app_data_file:file execute_no_trans;
37auditallow untrusted_app_25 app_data_file:file { execute execute_no_trans };
38
39# The ability to invoke dex2oat. Historically required by ART, now only
40# allowed for targetApi<=28 for compat reasons.
41allow untrusted_app_25 dex2oat_exec:file rx_file_perms;
42userdebug_or_eng(`auditallow untrusted_app_25 dex2oat_exec:file rx_file_perms;')
43
44# The ability to talk to /dev/ashmem directly. targetApi>=29 must use
45# ASharedMemory instead.
46allow untrusted_app_25 ashmem_device:chr_file rw_file_perms;
47auditallow untrusted_app_25 ashmem_device:chr_file open;
48
49# Read /mnt/sdcard symlink.
50allow untrusted_app_25 mnt_sdcard_file:lnk_file r_file_perms;
51
52# allow sending RTM_GETNEIGH{TBL} messages.
53allow untrusted_app_25 self:netlink_route_socket nlmsg_getneigh;
54auditallow untrusted_app_25 self:netlink_route_socket nlmsg_getneigh;
55
56# Connect to mdnsd via mdnsd socket.
57unix_socket_connect(untrusted_app_25, mdnsd, mdnsd)
58userdebug_or_eng(`
59  auditallow untrusted_app_25 mdnsd_socket:sock_file write;
60  auditallow untrusted_app_25 mdnsd:unix_stream_socket connectto;
61')
62
63# Allow calling inotify on APKs for backwards compatibility. This is disallowed
64# for targetSdkVersion>=34 to remove a sidechannel.
65allow untrusted_app_25 apk_data_file:dir { watch watch_reads };
66allow untrusted_app_25 apk_data_file:file { watch watch_reads };
67userdebug_or_eng(`
68  auditallow untrusted_app_25 apk_data_file:dir { watch watch_reads };
69  auditallow untrusted_app_25 apk_data_file:file { watch watch_reads };
70')
71