d33a9a194b
Create an event_log_tags_file label and use it for /dev/event-log-tags. Only trusted system log readers are allowed direct read access to this file, no write access. Untrusted domain requests lack direct access, and are thus checked for credentials via the "plan b" long path socket to the event log tag service. Test: gTest logd-unit-tests, liblog-unit-tests and logcat-unit-tests Bug: 31456426 Bug: 30566487 Change-Id: Ib9b71ca225d4436d764c9bc340ff7b1c9c252a9e
156 lines
5.7 KiB
Text
156 lines
5.7 KiB
Text
###
|
|
### A domain for further sandboxing privileged apps.
|
|
###
|
|
|
|
app_domain(priv_app)
|
|
|
|
# Access the network.
|
|
net_domain(priv_app)
|
|
# Access bluetooth.
|
|
bluetooth_domain(priv_app)
|
|
|
|
# Allow the allocation and use of ptys
|
|
# Used by: https://play.privileged.com/store/apps/details?id=jackpal.androidterm
|
|
create_pty(priv_app)
|
|
|
|
# webview crash handling depends on self ptrace (b/27697529, b/20150694, b/19277529#comment7)
|
|
allow priv_app self:process ptrace;
|
|
|
|
# Some apps ship with shared libraries that they write out
|
|
# to their sandbox directory and then dlopen().
|
|
allow priv_app app_data_file:file execute;
|
|
|
|
allow priv_app audioserver_service:service_manager find;
|
|
allow priv_app cameraserver_service:service_manager find;
|
|
allow priv_app drmserver_service:service_manager find;
|
|
allow priv_app mediacodec_service:service_manager find;
|
|
allow priv_app mediametrics_service:service_manager find;
|
|
allow priv_app mediadrmserver_service:service_manager find;
|
|
allow priv_app mediaextractor_service:service_manager find;
|
|
allow priv_app mediaserver_service:service_manager find;
|
|
allow priv_app nfc_service:service_manager find;
|
|
allow priv_app radio_service:service_manager find;
|
|
allow priv_app surfaceflinger_service:service_manager find;
|
|
allow priv_app app_api_service:service_manager find;
|
|
allow priv_app system_api_service:service_manager find;
|
|
allow priv_app persistent_data_block_service:service_manager find;
|
|
allow priv_app recovery_service:service_manager find;
|
|
|
|
# Write to /cache.
|
|
allow priv_app { cache_file cache_recovery_file }:dir create_dir_perms;
|
|
allow priv_app { cache_file cache_recovery_file }:file create_file_perms;
|
|
# /cache is a symlink to /data/cache on some devices. Allow reading the link.
|
|
allow priv_app cache_file:lnk_file r_file_perms;
|
|
|
|
# Write to /data/ota_package for OTA packages.
|
|
allow priv_app ota_package_file:dir rw_dir_perms;
|
|
allow priv_app ota_package_file:file create_file_perms;
|
|
|
|
# Access to /data/media.
|
|
allow priv_app media_rw_data_file:dir create_dir_perms;
|
|
allow priv_app media_rw_data_file:file create_file_perms;
|
|
|
|
# Used by Finsky / Android "Verify Apps" functionality when
|
|
# running "adb install foo.apk".
|
|
allow priv_app shell_data_file:file r_file_perms;
|
|
allow priv_app shell_data_file:dir r_dir_perms;
|
|
|
|
# Allow verifier to access staged apks.
|
|
allow priv_app { apk_tmp_file apk_private_tmp_file }:dir r_dir_perms;
|
|
allow priv_app { apk_tmp_file apk_private_tmp_file }:file r_file_perms;
|
|
|
|
# b/18504118: Allow reads from /data/anr/traces.txt
|
|
allow priv_app anr_data_file:file r_file_perms;
|
|
|
|
# Allow GMS core to access perfprofd output, which is stored
|
|
# in /data/misc/perfprofd/. GMS core will need to list all
|
|
# data stored in that directory to process them one by one.
|
|
userdebug_or_eng(`
|
|
allow priv_app perfprofd_data_file:file r_file_perms;
|
|
allow priv_app perfprofd_data_file:dir r_dir_perms;
|
|
')
|
|
|
|
# Allow GMS core to scan executables on the system partition
|
|
allow priv_app exec_type:file { getattr read open };
|
|
|
|
# For AppFuse.
|
|
allow priv_app vold:fd use;
|
|
allow priv_app fuse_device:chr_file { read write };
|
|
|
|
# /sys and /proc access
|
|
r_dir_file(priv_app, sysfs_type)
|
|
r_dir_file(priv_app, proc)
|
|
r_dir_file(priv_app, rootfs)
|
|
|
|
# access the mac address
|
|
allowxperm priv_app self:udp_socket ioctl SIOCGIFHWADDR;
|
|
|
|
# Allow GMS core to communicate with update_engine for A/B update.
|
|
binder_call(priv_app, update_engine)
|
|
allow priv_app update_engine_service:service_manager find;
|
|
|
|
# Allow Phone to read/write cached ringtones (opened by system).
|
|
allow priv_app ringtone_file:file { getattr read write };
|
|
|
|
# Access to /data/preloads
|
|
allow priv_app preloads_data_file:file r_file_perms;
|
|
allow priv_app preloads_data_file:dir r_dir_perms;
|
|
|
|
# TODO: revert this as part of fixing 33574909
|
|
# android.process.media uses /dev/mtp_usb
|
|
allow priv_app mtp_device:chr_file rw_file_perms;
|
|
|
|
# TODO: revert this as part of fixing 33574909
|
|
# MtpServer uses /dev/usb-ffs/mtp
|
|
allow priv_app functionfs:dir search;
|
|
allow priv_app functionfs:file rw_file_perms;
|
|
|
|
# TODO: revert this as part of fixing 33574909
|
|
# Traverse into /mnt/media_rw for bypassing FUSE daemon
|
|
# TODO: narrow this to just MediaProvider
|
|
allow priv_app mnt_media_rw_file:dir search;
|
|
|
|
read_runtime_log_tags(priv_app)
|
|
|
|
###
|
|
### neverallow rules
|
|
###
|
|
|
|
# Receive or send uevent messages.
|
|
neverallow priv_app domain:netlink_kobject_uevent_socket *;
|
|
|
|
# Receive or send generic netlink messages
|
|
neverallow priv_app domain:netlink_socket *;
|
|
|
|
# Too much leaky information in debugfs. It's a security
|
|
# best practice to ensure these files aren't readable.
|
|
neverallow priv_app debugfs:file read;
|
|
|
|
# Do not allow privileged apps to register services.
|
|
# Only trusted components of Android should be registering
|
|
# services.
|
|
neverallow priv_app service_manager_type:service_manager add;
|
|
|
|
# Do not allow privileged apps to connect to the property service
|
|
# or set properties. b/10243159
|
|
neverallow priv_app property_socket:sock_file write;
|
|
neverallow priv_app init:unix_stream_socket connectto;
|
|
neverallow priv_app property_type:property_service set;
|
|
|
|
# Do not allow priv_app to be assigned mlstrustedsubject.
|
|
# This would undermine the per-user isolation model being
|
|
# enforced via levelFrom=user in seapp_contexts and the mls
|
|
# constraints. As there is no direct way to specify a neverallow
|
|
# on attribute assignment, this relies on the fact that fork
|
|
# permission only makes sense within a domain (hence should
|
|
# never be granted to any other domain within mlstrustedsubject)
|
|
# and priv_app is allowed fork permission to itself.
|
|
neverallow priv_app mlstrustedsubject:process fork;
|
|
|
|
# Do not allow priv_app to hard link to any files.
|
|
# In particular, if priv_app links to other app data
|
|
# files, installd will not be able to guarantee the deletion
|
|
# of the linked to file. Hard links also contribute to security
|
|
# bugs, so we want to ensure priv_app never has this
|
|
# capability.
|
|
neverallow priv_app file_type:file link;
|