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