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platform_system_sepolicy/public/dhcp.te

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Create attribute for moving perms out of domain Motivation: Domain is overly permissive. Start removing permissions from domain and assign them to the domain_deprecated attribute. Domain_deprecated and domain can initially be assigned to all domains. The goal is to not assign domain_deprecated to new domains and to start removing domain_deprecated where it is not required or reassigning the appropriate permissions to the inheriting domain when necessary. Bug: 25433265 Change-Id: I8b11cb137df7bdd382629c98d916a73fe276413c
2015-11-03 18:54:39 +01:00
type dhcp, domain, domain_deprecated;
dhcp policy.
2012-08-15 12:25:14 +02:00
type dhcp_exec, exec_type, file_type;
Revert "Revert "Various minor policy fixes based on CTS."" This reverts commit ba84bf1dec64d745b6efc516799b2c722a672cd9 Hidden dependency resolved. Change-Id: I9f0844f643abfda8405db2c722a36c847882c392
2013-03-26 19:00:13 +01:00
net_domain(dhcp)
Confine dhcp, but leave it permissive for now. Change-Id: I11b185ff539915174bd2da53bfaa2cad87173008 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-10-29 19:42:35 +01:00
allow dhcp cgroup:dir { create write add_name };
allow dhcp self:capability { setgid setuid net_admin net_raw net_bind_service };
Enforce ioctl command whitelisting on all sockets Remove the ioctl permission for most socket types. For others, such as tcp/udp/rawip/unix_dgram/unix_stream set a default unprivileged whitelist that individual domains may extend (except where neverallowed like untrusted_app). Enforce via a neverallowxperm rule. Change-Id: I15548d830f8eff1fd4d64005c5769ca2be8d4ffe
2016-05-17 06:12:17 +02:00
allow dhcp self:packet_socket create_socket_perms_no_ioctl;
Clean up socket rules. Replace * or any permission set containing create with create_socket_perms or create_stream_socket_perms. Add net_domain() to all domains using network sockets and delete rules already covered by domain.te or net.te. For netlink_route_socket, only nlmsg_write needs to be separately granted to specific domains that are permitted to modify the routing table. Clarification: read/write permissions are just ability to perform read/recv() or write/send() on the socket, whereas nlmsg_read/ nlmsg_write permissions control ability to observe or modify the underlying kernel state accessed via the socket. See security/selinux/nlmsgtab.c in the kernel for the mapping of netlink message types to nlmsg_read or nlmsg_write. Delete legacy rule for b/12061011. This change does not touch any rules where only read/write were allowed to a socket created by another domain (inherited across exec or received across socket or binder IPC). We may wish to rewrite some or all of those rules with the rw_socket_perms macro but that is a separate change. Change-Id: Ib0637ab86f6d388043eff928e5d96beb02e5450e Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2014-02-24 21:06:11 +01:00
allow dhcp self:netlink_route_socket nlmsg_write;
Confine dhcp, but leave it permissive for now. Change-Id: I11b185ff539915174bd2da53bfaa2cad87173008 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-10-29 19:42:35 +01:00
allow dhcp shell_exec:file rx_file_perms;
allow dhcp system_file:file rx_file_perms;
drop dhcp auditallow toolbox_exec is executed by dhcpcd-run-hooks. Addresses the following auditallow log spam: avc: granted { read open } for comm="dhcpcd-run-hook" path="/system/bin/toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { read } for comm="setprop" name="toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { execute } for comm="dhcpcd-run-hook" name="toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { execute_no_trans } for comm="dhcpcd-run-hook" path="/system/bin/toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { read execute } for comm="setprop" path="/system/bin/toybox" dev="dm-0" ino=639 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file Change-Id: Ib83c291961a5573397830032a67a2f6861ae2e71
2016-01-14 01:37:20 +01:00
# dhcpcd runs dhcpcd-hooks/*, which runs getprop / setprop (toolbox_exec)
Only allow toolbox exec where /system exec was already allowed. When the toolbox domain was introduced, we allowed all domains to exec it to avoid breakage. However, only domains that were previously allowed the ability to exec /system files would have been able to do this prior to the introduction of the toolbox domain. Remove the rule from domain.te and add rules to all domains that are already allowed execute_no_trans to system_file. Requires coordination with device-specific policy changes with the same Change-Id. Change-Id: Ie46209f0412f9914857dc3d7c6b0917b7031aae5 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2015-08-25 17:38:29 +02:00
allow dhcp toolbox_exec:file rx_file_perms;
drop dhcp auditallow toolbox_exec is executed by dhcpcd-run-hooks. Addresses the following auditallow log spam: avc: granted { read open } for comm="dhcpcd-run-hook" path="/system/bin/toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { read } for comm="setprop" name="toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { execute } for comm="dhcpcd-run-hook" name="toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { execute_no_trans } for comm="dhcpcd-run-hook" path="/system/bin/toybox" dev="dm-0" ino=650 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file avc: granted { read execute } for comm="setprop" path="/system/bin/toybox" dev="dm-0" ino=639 scontext=u:r:dhcp:s0 tcontext=u:object_r:toolbox_exec:s0 tclass=file Change-Id: Ib83c291961a5573397830032a67a2f6861ae2e71
2016-01-14 01:37:20 +01:00
Create proc_net type for /proc/sys/net entries. /proc/sys/net could use its own type to help distinguish among some of the proc access rules. Fix dhcp and netd because of this. Change-Id: I6e16cba660f07bc25f437bf43e1eba851a88d538 Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
2014-01-07 19:46:56 +01:00
# For /proc/sys/net/ipv4/conf/*/promote_secondaries
Revert /proc/net related changes Revert the tightening of /proc/net access. These changes are causing a lot of denials, and I want additional time to figure out a better solution. Addresses the following denials (and many more): avc: denied { read } for comm="SyncAdapterThre" name="stats" dev="proc" ino=X scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:proc_net:s0 tclass=file avc: denied { read } for comm="facebook.katana" name="iface_stat_fmt" dev="proc" ino=X scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:proc_net:s0 tclass=file avc: denied { read } for comm="IntentService[C" name="if_inet6" dev="proc" ino=X scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:proc_net:s0 tclass=file avc: denied { read } for comm="dumpstate" name="iface_stat_all" dev="proc" ino=X scontext=u:r:dumpstate:s0 tcontext=u:object_r:proc_net:s0 tclass=file This reverts commit 0f0324cc826afb9beefda802d496befe823a081e and commit 99940d1af5719f1622fa2a17f8daf6cb21de3ad1 Bug: 9496886 Bug: 19034637 Change-Id: I436a6e3638ac9ed49afbee214e752fe2b0112868
2015-02-25 22:28:40 +01:00
allow dhcp proc_net:file write;
Replace unix_socket_connect() and explicit property sets with macro A common source of mistakes when authoring sepolicy is properly setting up property sets. This is a 3 part step of: 1. Allowing the unix domain connection to the init/property service 2. Allowing write on the property_socket file 3. Allowing the set on class property_service The macro unix_socket_connect() handled 1 and 2, but could be confusing for first time policy authors. 3 had to be explicitly added. To correct this, we introduce a new macros: set_prop(sourcedomain, targetprop) This macro handles steps 1, 2 and 3. No difference in sediff is expected. Change-Id: I630ba0178439c935d08062892990d43a3cc1239e Signed-off-by: William Roberts <william.c.roberts@linux.intel.com>
2015-05-05 03:22:45 +02:00
set_prop(dhcp, dhcp_prop)
set_prop(dhcp, pan_result_prop)
dhcp policy.
2012-08-15 12:25:14 +02:00
Confine dhcp, but leave it permissive for now. Change-Id: I11b185ff539915174bd2da53bfaa2cad87173008 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-10-29 19:42:35 +01:00
allow dhcp dhcp_data_file:dir create_dir_perms;
allow dhcp dhcp_data_file:file create_file_perms;
# PAN connections
allow dhcp netd:fd use;
allow dhcp netd:fifo_file rw_file_perms;
allow dhcp netd:{ dgram_socket_class_set unix_stream_socket } { read write };
allow dhcp netd:{ netlink_kobject_uevent_socket netlink_route_socket netlink_nflog_socket } { read write };
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