1###
2### Untrusted_app_25
3###
4### This file defines the rules for untrusted apps running with
5### targetSdkVersion <= 25.
6###
7### Apps are labeled based on mac_permissions.xml (maps signer and
8### optionally package name to seinfo value) and seapp_contexts (maps UID
9### and optionally seinfo value to domain for process and type for data
10### directory).  The untrusted_app domain is the default assignment in
11### seapp_contexts for any app with UID between APP_AID (10000)
12### and AID_ISOLATED_START (99000) if the app has no specific seinfo
13### value as determined from mac_permissions.xml.  In current AOSP, this
14### domain is assigned to all non-system apps as well as to any system apps
15### that are not signed by the platform key.  To move
16### a system app into a specific domain, add a signer entry for it to
17### mac_permissions.xml and assign it one of the pre-existing seinfo values
18### or define and use a new seinfo value in both mac_permissions.xml and
19### seapp_contexts.
20###
21
22typeattribute untrusted_app_25 coredomain;
23
24app_domain(untrusted_app_25)
25untrusted_app_domain(untrusted_app_25)
26net_domain(untrusted_app_25)
27bluetooth_domain(untrusted_app_25)
28
29# b/34115651, b/33308258 - net.dns* properties read
30# This will go away in a future Android release
31get_prop(untrusted_app_25, net_dns_prop)
32auditallow untrusted_app_25 net_dns_prop:file read;
33
34# b/35917228 - /proc/misc access
35# This will go away in a future Android release
36allow untrusted_app_25 proc_misc:file r_file_perms;
37
38# Access to /proc/tty/drivers, to allow apps to determine if they
39# are running in an emulated environment.
40# b/33214085 b/33814662 b/33791054 b/33211769
41# https://github.com/strazzere/anti-emulator/blob/master/AntiEmulator/src/diff/strazzere/anti/emulator/FindEmulator.java
42# This will go away in a future Android release
43allow untrusted_app_25 proc_tty_drivers:file r_file_perms;
44
45# Text relocation support for API < 23. This is now disallowed for targetSdkVersion>=Q.
46# https://android.googlesource.com/platform/bionic/+/master/android-changes-for-ndk-developers.md#text-relocations-enforced-for-api-level-23
47allow untrusted_app_25 { apk_data_file app_data_file asec_public_file }:file execmod;
48
49# The ability to call exec() on files in the apps home directories
50# for targetApi<=25. This is also allowed for targetAPIs 26, 27,
51# and 28 in untrusted_app_27.te.
52allow untrusted_app_25 app_data_file:file execute_no_trans;
53auditallow untrusted_app_25 app_data_file:file { execute execute_no_trans };
54
55# The ability to invoke dex2oat. Historically required by ART, now only
56# allowed for targetApi<=28 for compat reasons.
57allow untrusted_app_25 dex2oat_exec:file rx_file_perms;
58userdebug_or_eng(`auditallow untrusted_app_25 dex2oat_exec:file rx_file_perms;')
59
60# The ability to talk to /dev/ashmem directly. targetApi>=29 must use
61# ASharedMemory instead.
62allow untrusted_app_25 ashmem_device:chr_file rw_file_perms;
63auditallow untrusted_app_25 ashmem_device:chr_file open;
64