untrusted_app_29: add new targetSdk domain
Enforce new requirements on app with targetSdkVersion=30 including:
- No bind() on netlink route sockets.
- No RTM_GETLINK on netlink route sockets.
Remove some of the repetitive descriptions in each untrusted_app_N.te
file, and instead refer to the description in
public/untrusted_app.te.
Bug: 141455849
Test: CtsSelinuxTargetSdkCurrentTestCases
Change-Id: Iad4d142c0c13615b4710d378bc1feca4d125b6cc
diff --git a/private/app_neverallows.te b/private/app_neverallows.te
index 6248cab..3747a52 100644
--- a/private/app_neverallows.te
+++ b/private/app_neverallows.te
@@ -9,6 +9,7 @@
untrusted_app
untrusted_app_25
untrusted_app_27
+ untrusted_app_29
untrusted_app_all
}')
# Receive or send uevent messages.
@@ -111,6 +112,14 @@
alg_socket nfc_socket vsock_socket kcm_socket qipcrtr_socket smc_socket xdp_socket
} *;
+# Disallow calling bind() and sending RTM_GETLINK messages on netlink sockets.
+neverallow {
+ all_untrusted_apps
+ -untrusted_app_25
+ -untrusted_app_27
+ -untrusted_app_29
+} domain:netlink_route_socket { bind nlmsg_readpriv };
+
# Do not allow untrusted apps access to /cache
neverallow { all_untrusted_apps -mediaprovider } { cache_file cache_recovery_file }:dir ~{ r_dir_perms };
neverallow { all_untrusted_apps -mediaprovider } { cache_file cache_recovery_file }:file ~{ read getattr };
diff --git a/private/compat/29.0/29.0.ignore.cil b/private/compat/29.0/29.0.ignore.cil
index 3a5be19..9c9cc12 100644
--- a/private/compat/29.0/29.0.ignore.cil
+++ b/private/compat/29.0/29.0.ignore.cil
@@ -69,6 +69,7 @@
system_unsolzygote_socket
tethering_service
timezonedetector_service
+ untrusted_app_29
usb_serial_device
userspace_reboot_prop
userspace_reboot_config_prop
diff --git a/private/seapp_contexts b/private/seapp_contexts
index 3838578..fed4325 100644
--- a/private/seapp_contexts
+++ b/private/seapp_contexts
@@ -163,7 +163,8 @@
user=_app isPrivApp=true name=com.google.android.gms domain=gmscore_app type=privapp_data_file levelFrom=user
user=_app isPrivApp=true name=com.google.android.gms.* domain=gmscore_app type=privapp_data_file levelFrom=user
user=_app isPrivApp=true name=com.google.android.gms:* domain=gmscore_app type=privapp_data_file levelFrom=user
-user=_app minTargetSdkVersion=29 domain=untrusted_app type=app_data_file levelFrom=all
+user=_app minTargetSdkVersion=30 domain=untrusted_app type=app_data_file levelFrom=all
+user=_app minTargetSdkVersion=29 domain=untrusted_app_29 type=app_data_file levelFrom=all
user=_app minTargetSdkVersion=28 domain=untrusted_app_27 type=app_data_file levelFrom=all
user=_app minTargetSdkVersion=26 domain=untrusted_app_27 type=app_data_file levelFrom=user
user=_app domain=untrusted_app_25 type=app_data_file levelFrom=user
diff --git a/private/untrusted_app.te b/private/untrusted_app.te
index c15fa22..6e7a99c 100644
--- a/private/untrusted_app.te
+++ b/private/untrusted_app.te
@@ -1,20 +1,11 @@
###
### Untrusted apps.
###
-### This file defines the rules for untrusted apps.
-### Apps are labeled based on mac_permissions.xml (maps signer and
-### optionally package name to seinfo value) and seapp_contexts (maps UID
-### and optionally seinfo value to domain for process and type for data
-### directory). The untrusted_app domain is the default assignment in
-### seapp_contexts for any app with UID between APP_AID (10000)
-### and AID_ISOLATED_START (99000) if the app has no specific seinfo
-### value as determined from mac_permissions.xml. In current AOSP, this
-### domain is assigned to all non-system apps as well as to any system apps
-### that are not signed by the platform key. To move
-### a system app into a specific domain, add a signer entry for it to
-### mac_permissions.xml and assign it one of the pre-existing seinfo values
-### or define and use a new seinfo value in both mac_permissions.xml and
-### seapp_contexts.
+### This file defines the rules for untrusted apps running with
+### targetSdkVersion >= 30.
+###
+### See public/untrusted_app.te for more information about which apps are
+### placed in this selinux domain.
###
typeattribute untrusted_app coredomain;
diff --git a/private/untrusted_app_25.te b/private/untrusted_app_25.te
index 2091f2e..a1abc41 100644
--- a/private/untrusted_app_25.te
+++ b/private/untrusted_app_25.te
@@ -4,19 +4,8 @@
### This file defines the rules for untrusted apps running with
### targetSdkVersion <= 25.
###
-### Apps are labeled based on mac_permissions.xml (maps signer and
-### optionally package name to seinfo value) and seapp_contexts (maps UID
-### and optionally seinfo value to domain for process and type for data
-### directory). The untrusted_app domain is the default assignment in
-### seapp_contexts for any app with UID between APP_AID (10000)
-### and AID_ISOLATED_START (99000) if the app has no specific seinfo
-### value as determined from mac_permissions.xml. In current AOSP, this
-### domain is assigned to all non-system apps as well as to any system apps
-### that are not signed by the platform key. To move
-### a system app into a specific domain, add a signer entry for it to
-### mac_permissions.xml and assign it one of the pre-existing seinfo values
-### or define and use a new seinfo value in both mac_permissions.xml and
-### seapp_contexts.
+### See public/untrusted_app.te for more information about which apps are
+### placed in this selinux domain.
###
typeattribute untrusted_app_25 coredomain;
@@ -59,3 +48,6 @@
# Read /mnt/sdcard symlink.
allow untrusted_app_25 mnt_sdcard_file:lnk_file r_file_perms;
+
+# allow binding to netlink route sockets and sending RTM_GETLINK messages.
+allow untrusted_app_25 self:netlink_route_socket { bind nlmsg_readpriv };
diff --git a/private/untrusted_app_27.te b/private/untrusted_app_27.te
index 03b3013..b7b6d72 100644
--- a/private/untrusted_app_27.te
+++ b/private/untrusted_app_27.te
@@ -4,20 +4,8 @@
### This file defines the rules for untrusted apps running with
### 25 < targetSdkVersion <= 28.
###
-### This file defines the rules for untrusted apps.
-### Apps are labeled based on mac_permissions.xml (maps signer and
-### optionally package name to seinfo value) and seapp_contexts (maps UID
-### and optionally seinfo value to domain for process and type for data
-### directory). The untrusted_app_27 domain is the default assignment in
-### seapp_contexts for any app with UID between APP_AID (10000)
-### and AID_ISOLATED_START (99000) if the app has no specific seinfo
-### value as determined from mac_permissions.xml. In current AOSP, this
-### domain is assigned to all non-system apps as well as to any system apps
-### that are not signed by the platform key. To move
-### a system app into a specific domain, add a signer entry for it to
-### mac_permissions.xml and assign it one of the pre-existing seinfo values
-### or define and use a new seinfo value in both mac_permissions.xml and
-### seapp_contexts.
+### See public/untrusted_app.te for more information about which apps are
+### placed in this selinux domain.
###
typeattribute untrusted_app_27 coredomain;
@@ -48,3 +36,6 @@
# Read /mnt/sdcard symlink.
allow untrusted_app_27 mnt_sdcard_file:lnk_file r_file_perms;
+
+# allow binding to netlink route sockets and sending RTM_GETLINK messages.
+allow untrusted_app_27 self:netlink_route_socket { bind nlmsg_readpriv };
diff --git a/private/untrusted_app_29.te b/private/untrusted_app_29.te
new file mode 100644
index 0000000..344ae89
--- /dev/null
+++ b/private/untrusted_app_29.te
@@ -0,0 +1,19 @@
+###
+### Untrusted_29.
+###
+### This file defines the rules for untrusted apps running with
+### targetSdkVersion = 29.
+###
+### See public/untrusted_app.te for more information about which apps are
+### placed in this selinux domain.
+###
+
+typeattribute untrusted_app_29 coredomain;
+
+app_domain(untrusted_app_29)
+untrusted_app_domain(untrusted_app_29)
+net_domain(untrusted_app_29)
+bluetooth_domain(untrusted_app_29)
+
+# allow binding to netlink route sockets and sending RTM_GETLINK messages.
+allow untrusted_app_29 self:netlink_route_socket { bind nlmsg_readpriv };