xref: /aosp_15_r20/system/sepolicy/private/untrusted_app_25.te (revision e4a36f4174b17bbab9dc043f4a65dc8d87377290)

###
### Untrusted_app_25
###
### This file defines the rules for untrusted apps running with
### targetSdkVersion <= 25.
###
### See public/untrusted_app.te for more information about which apps are
### placed in this selinux domain.
###

typeattribute untrusted_app_25 coredomain;

app_domain(untrusted_app_25)
untrusted_app_domain(untrusted_app_25)
net_domain(untrusted_app_25)
bluetooth_domain(untrusted_app_25)

# b/35917228 - /proc/misc access
# This will go away in a future Android release
allow untrusted_app_25 proc_misc:file r_file_perms;

# Access to /proc/tty/drivers, to allow apps to determine if they
# are running in an emulated environment.
# b/33214085 b/33814662 b/33791054 b/33211769
# https://github.com/strazzere/anti-emulator/blob/master/AntiEmulator/src/diff/strazzere/anti/emulator/FindEmulator.java
# This will go away in a future Android release
allow untrusted_app_25 proc_tty_drivers:file r_file_perms;

# Text relocation support for API < 23. This is now disallowed for targetSdkVersion>=Q.
# https://android.googlesource.com/platform/bionic/+/master/android-changes-for-ndk-developers.md#text-relocations-enforced-for-api-level-23
allow untrusted_app_25 { apk_data_file app_data_file asec_public_file }:file execmod;

# The ability to call exec() on files in the apps home directories
# for targetApi<=25. This is also allowed for targetAPIs 26, 27,
# and 28 in untrusted_app_27.te.
allow untrusted_app_25 app_data_file:file execute_no_trans;
auditallow untrusted_app_25 app_data_file:file { execute execute_no_trans };

# The ability to invoke dex2oat. Historically required by ART, now only
# allowed for targetApi<=28 for compat reasons.
allow untrusted_app_25 dex2oat_exec:file rx_file_perms;
userdebug_or_eng(`auditallow untrusted_app_25 dex2oat_exec:file rx_file_perms;')

# The ability to talk to /dev/ashmem directly. targetApi>=29 must use
# ASharedMemory instead.
allow untrusted_app_25 ashmem_device:chr_file rw_file_perms;
auditallow untrusted_app_25 ashmem_device:chr_file open;

# Read /mnt/sdcard symlink.
allow untrusted_app_25 mnt_sdcard_file:lnk_file r_file_perms;

# allow sending RTM_GETNEIGH{TBL} messages.
allow untrusted_app_25 self:netlink_route_socket nlmsg_getneigh;
auditallow untrusted_app_25 self:netlink_route_socket nlmsg_getneigh;

# Connect to mdnsd via mdnsd socket.
unix_socket_connect(untrusted_app_25, mdnsd, mdnsd)
userdebug_or_eng(`
  auditallow untrusted_app_25 mdnsd_socket:sock_file write;
  auditallow untrusted_app_25 mdnsd:unix_stream_socket connectto;
')

# Allow calling inotify on APKs for backwards compatibility. This is disallowed
# for targetSdkVersion>=34 to remove a sidechannel.
allow untrusted_app_25 apk_data_file:dir { watch watch_reads };
allow untrusted_app_25 apk_data_file:file { watch watch_reads };
userdebug_or_eng(`
  auditallow untrusted_app_25 apk_data_file:dir { watch watch_reads };
  auditallow untrusted_app_25 apk_data_file:file { watch watch_reads };
')