5fd175fa45
The implementation for NETLINK_FIREWALL and NETLINK_IP6_FW protocols was removed from the kernel in commit d16cf20e2f2f13411eece7f7fb72c17d141c4a84 ("netfilter: remove ip_queue support") circa Linux 3.5. Consequently, kernels >= 3.5 should never perform permission checks on these classes although they remained defined in the SELinux kernel classmap until the netlink classes were updated by https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6c6d2e9bde1c1c87a7ead806f8f5e2181d41a652 circa Linux v4.2. Removing these class definitions would break legacy userspace that relies upon stable values for the userspace security class definitions since it will perturb those values by removing classes that preceded them. dbus-daemon in particular is known to break if its dbus class changes at runtime, which could occur upon a policy reload that removes these classes. Fixing this requires ensuring that dbus-daemon looks up the appropriate class value on each use or upon policy reload, via userspace interfaces such as selinux_check_access(), string_to_security_class(), and/or selinux_set_callback(SELINUX_CB_POLICYLOAD, ...) with a callback function that remaps the class value if needed. Other userspace policy enforcers are believed to have been updated in recent versions but older versions may break upon such a change. Hence, this change renames these classes with obsolete_ prefixes and removes all rules referencing them from refpolicy, thereby preserving the class numbering for subsequent classes while making it clear that these classses are no longer meaningful for modern kernels. This change does however create a potential compatibility break for kernels < 3.5, since the policy will cease to define the kernel class names and therefore the kernel will handle permission checks on the class based on the handle_unknown setting in policy. For most Linux distributions, this will default to allow and therefore avoid breaking userspace but will fail open. For kernels < 2.6.33 (i.e. the dynamic class/perm discovery support), the presence of a class in policy with the same number but a different name than the kernel class will cause the policy load to fail entirely. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
1044 lines
11 KiB
Plaintext
1044 lines
11 KiB
Plaintext
#
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# Define common prefixes for access vectors
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#
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# common common_name { permission_name ... }
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#
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# Define a common prefix for file access vectors.
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#
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common file
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{
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ioctl
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read
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write
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create
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getattr
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setattr
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lock
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relabelfrom
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relabelto
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append
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map
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unlink
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link
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rename
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execute
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quotaon
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mounton
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audit_access
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open
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execmod
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watch
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watch_mount
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watch_sb
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watch_with_perm
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watch_reads
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}
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#
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# Define a common prefix for socket access vectors.
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#
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common socket
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{
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# inherited from file
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ioctl
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read
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write
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create
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getattr
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setattr
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lock
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relabelfrom
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relabelto
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append
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map
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# socket-specific
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bind
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connect
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listen
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accept
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getopt
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setopt
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shutdown
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recvfrom
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sendto
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name_bind
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}
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#
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# Define a common prefix for ipc access vectors.
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#
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common ipc
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{
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create
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destroy
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getattr
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setattr
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read
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write
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associate
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unix_read
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unix_write
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}
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#
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# Define a common prefix for userspace database object access vectors.
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#
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common database
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{
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create
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drop
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getattr
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setattr
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relabelfrom
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relabelto
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}
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#
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# Define a common prefix for pointer and keyboard access vectors.
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#
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common x_device
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{
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getattr
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setattr
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use
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read
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write
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getfocus
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setfocus
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bell
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force_cursor
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freeze
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grab
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manage
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list_property
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get_property
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set_property
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add
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remove
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create
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destroy
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}
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#
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# Define a common for capability access vectors.
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#
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common cap
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{
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# The capabilities are defined in include/linux/capability.h
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# Capabilities >= 32 are defined in the cap2 common.
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# Care should be taken to ensure that these are consistent with
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# those definitions. (Order matters)
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chown
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dac_override
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dac_read_search
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fowner
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fsetid
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kill
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setgid
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setuid
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setpcap
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linux_immutable
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net_bind_service
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net_broadcast
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net_admin
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net_raw
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ipc_lock
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ipc_owner
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sys_module
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sys_rawio
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sys_chroot
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sys_ptrace
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sys_pacct
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sys_admin
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sys_boot
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sys_nice
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sys_resource
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sys_time
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sys_tty_config
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mknod
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lease
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audit_write
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audit_control
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setfcap
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}
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common cap2
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{
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mac_override # unused by SELinux
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mac_admin
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syslog
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wake_alarm
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block_suspend
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audit_read
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}
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#
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# Define the access vectors.
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#
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# class class_name [ inherits common_name ] { permission_name ... }
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#
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# Define the access vector interpretation for file-related objects.
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#
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class filesystem
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{
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mount
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remount
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unmount
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getattr
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relabelfrom
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relabelto
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associate
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quotamod
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quotaget
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watch
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}
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class dir
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inherits file
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{
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add_name
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remove_name
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reparent
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search
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rmdir
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}
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class file
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inherits file
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{
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execute_no_trans
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entrypoint
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}
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class lnk_file
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inherits file
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class chr_file
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inherits file
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class blk_file
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inherits file
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class sock_file
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inherits file
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class fifo_file
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inherits file
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class fd
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{
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use
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}
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#
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# Define the access vector interpretation for network-related objects.
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#
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class socket
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inherits socket
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class tcp_socket
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inherits socket
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{
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node_bind
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name_connect
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}
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class udp_socket
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inherits socket
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{
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node_bind
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}
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class rawip_socket
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inherits socket
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{
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node_bind
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}
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class node
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{
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recvfrom
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sendto
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}
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class netif
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{
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ingress
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egress
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}
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class netlink_socket
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inherits socket
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class packet_socket
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inherits socket
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class key_socket
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inherits socket
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class unix_stream_socket
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inherits socket
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{
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connectto
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}
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class unix_dgram_socket
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inherits socket
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#
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# Define the access vector interpretation for process-related objects
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#
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class process
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{
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fork
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transition
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sigchld # commonly granted from child to parent
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sigkill # cannot be caught or ignored
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sigstop # cannot be caught or ignored
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signull # for kill(pid, 0)
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signal # all other signals
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ptrace
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getsched
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setsched
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getsession
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getpgid
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setpgid
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getcap
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setcap
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share
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getattr
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setexec
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setfscreate
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noatsecure
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siginh
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setrlimit
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rlimitinh
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dyntransition
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setcurrent
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execmem
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execstack
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execheap
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setkeycreate
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setsockcreate
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getrlimit
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}
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class process2
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{
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nnp_transition
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nosuid_transition
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}
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#
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# Define the access vector interpretation for ipc-related objects
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#
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class ipc
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inherits ipc
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class sem
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inherits ipc
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class msgq
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inherits ipc
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{
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enqueue
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}
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class msg
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{
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send
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receive
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}
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class shm
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inherits ipc
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{
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lock
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}
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#
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# Define the access vector interpretation for the security server.
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#
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class security
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{
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compute_av
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compute_create
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compute_member
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check_context
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load_policy
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compute_relabel
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compute_user
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setenforce # was avc_toggle in system class
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setbool
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setsecparam
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setcheckreqprot
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read_policy
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validate_trans
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}
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#
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# Define the access vector interpretation for system operations.
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#
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class system
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{
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ipc_info
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syslog_read
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syslog_mod
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syslog_console
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module_request
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module_load
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# these are overloaded userspace
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# permissions from systemd
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halt
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reboot
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status
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start
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stop
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enable
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disable
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reload
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}
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#
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# Define the access vector interpretation for controlling capabilities
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#
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class capability
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inherits cap
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class capability2
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inherits cap2
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#
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# Define the access vector interpretation for controlling
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# changes to passwd information.
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#
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class passwd
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{
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passwd # change another user passwd
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chfn # change another user finger info
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chsh # change another user shell
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rootok # pam_rootok check (skip auth)
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crontab # crontab on another user
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}
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#
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# SE-X Windows stuff
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#
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class x_drawable
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{
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create
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destroy
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read
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write
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blend
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getattr
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setattr
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list_child
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add_child
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remove_child
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list_property
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get_property
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set_property
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manage
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override
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show
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hide
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send
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receive
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}
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class x_screen
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{
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getattr
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setattr
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hide_cursor
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show_cursor
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saver_getattr
|
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saver_setattr
|
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saver_hide
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saver_show
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|
}
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class x_gc
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{
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create
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destroy
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getattr
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setattr
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use
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}
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class x_font
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{
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create
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destroy
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getattr
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add_glyph
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remove_glyph
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use
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}
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|
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class x_colormap
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{
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create
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destroy
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read
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write
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getattr
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add_color
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remove_color
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install
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uninstall
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use
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}
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class x_property
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{
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create
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destroy
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read
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write
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append
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getattr
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setattr
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}
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class x_selection
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{
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read
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write
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getattr
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setattr
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}
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class x_cursor
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{
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create
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destroy
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read
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write
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getattr
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setattr
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use
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}
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class x_client
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{
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destroy
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getattr
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setattr
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manage
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}
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class x_device
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inherits x_device
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class x_server
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{
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getattr
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setattr
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record
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debug
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grab
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manage
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}
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class x_extension
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{
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query
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use
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}
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class x_resource
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{
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read
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write
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}
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class x_event
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{
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send
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receive
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}
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class x_synthetic_event
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{
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send
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receive
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}
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#
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# Extended Netlink classes
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#
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class netlink_route_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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}
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class obsolete_netlink_firewall_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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}
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|
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class netlink_tcpdiag_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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}
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class netlink_nflog_socket
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inherits socket
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|
|
|
class netlink_xfrm_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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}
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class netlink_selinux_socket
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inherits socket
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|
|
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class netlink_audit_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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nlmsg_relay
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|
nlmsg_readpriv
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|
nlmsg_tty_audit
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}
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|
|
class obsolete_netlink_ip6fw_socket
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inherits socket
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{
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nlmsg_read
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nlmsg_write
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}
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|
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class netlink_dnrt_socket
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inherits socket
|
|
|
|
# Define the access vector interpretation for controlling
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# access and communication through the D-BUS messaging
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|
# system.
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|
#
|
|
class dbus
|
|
{
|
|
acquire_svc
|
|
send_msg
|
|
}
|
|
|
|
# Define the access vector interpretation for controlling
|
|
# access through the name service cache daemon (nscd).
|
|
#
|
|
class nscd
|
|
{
|
|
getpwd
|
|
getgrp
|
|
gethost
|
|
getstat
|
|
admin
|
|
shmempwd
|
|
shmemgrp
|
|
shmemhost
|
|
getserv
|
|
shmemserv
|
|
}
|
|
|
|
# Define the access vector interpretation for controlling
|
|
# access to IPSec network data by association
|
|
#
|
|
class association
|
|
{
|
|
sendto
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|
recvfrom
|
|
setcontext
|
|
polmatch
|
|
}
|
|
|
|
# Updated Netlink class for KOBJECT_UEVENT family.
|
|
class netlink_kobject_uevent_socket
|
|
inherits socket
|
|
|
|
class appletalk_socket
|
|
inherits socket
|
|
|
|
class packet
|
|
{
|
|
send
|
|
recv
|
|
relabelto
|
|
forward_in
|
|
forward_out
|
|
}
|
|
|
|
class key
|
|
{
|
|
view
|
|
read
|
|
write
|
|
search
|
|
link
|
|
setattr
|
|
create
|
|
}
|
|
|
|
class context
|
|
{
|
|
unused_perm
|
|
contains
|
|
}
|
|
|
|
class dccp_socket
|
|
inherits socket
|
|
{
|
|
node_bind
|
|
name_connect
|
|
}
|
|
|
|
class memprotect
|
|
{
|
|
mmap_zero
|
|
}
|
|
|
|
class db_database
|
|
inherits database
|
|
{
|
|
access
|
|
install_module
|
|
load_module
|
|
get_param # deprecated
|
|
set_param # deprecated
|
|
}
|
|
|
|
class db_table
|
|
inherits database
|
|
{
|
|
select
|
|
update
|
|
insert
|
|
delete
|
|
lock
|
|
}
|
|
|
|
class db_procedure
|
|
inherits database
|
|
{
|
|
execute
|
|
entrypoint
|
|
install
|
|
}
|
|
|
|
class db_column
|
|
inherits database
|
|
{
|
|
select
|
|
update
|
|
insert
|
|
}
|
|
|
|
class db_tuple
|
|
{
|
|
relabelfrom
|
|
relabelto
|
|
use
|
|
select
|
|
update
|
|
insert
|
|
delete
|
|
}
|
|
|
|
class db_blob
|
|
inherits database
|
|
{
|
|
read
|
|
write
|
|
import
|
|
export
|
|
}
|
|
|
|
class db_exception
|
|
inherits database
|
|
{
|
|
use
|
|
}
|
|
|
|
class db_datatype
|
|
inherits database
|
|
{
|
|
use
|
|
}
|
|
|
|
# network peer labels
|
|
class peer
|
|
{
|
|
recv
|
|
}
|
|
|
|
class x_application_data
|
|
{
|
|
paste
|
|
paste_after_confirm
|
|
copy
|
|
}
|
|
|
|
class kernel_service
|
|
{
|
|
use_as_override
|
|
create_files_as
|
|
}
|
|
|
|
class tun_socket
|
|
inherits socket
|
|
{
|
|
attach_queue
|
|
}
|
|
|
|
class binder
|
|
{
|
|
impersonate
|
|
call
|
|
set_context_mgr
|
|
transfer
|
|
}
|
|
|
|
class netlink_iscsi_socket
|
|
inherits socket
|
|
|
|
class netlink_fib_lookup_socket
|
|
inherits socket
|
|
|
|
class netlink_connector_socket
|
|
inherits socket
|
|
|
|
class netlink_netfilter_socket
|
|
inherits socket
|
|
|
|
class netlink_generic_socket
|
|
inherits socket
|
|
|
|
class netlink_scsitransport_socket
|
|
inherits socket
|
|
|
|
class netlink_rdma_socket
|
|
inherits socket
|
|
|
|
class netlink_crypto_socket
|
|
inherits socket
|
|
|
|
class x_pointer
|
|
inherits x_device
|
|
|
|
class x_keyboard
|
|
inherits x_device
|
|
|
|
class db_schema
|
|
inherits database
|
|
{
|
|
search
|
|
add_name
|
|
remove_name
|
|
}
|
|
|
|
class db_view
|
|
inherits database
|
|
{
|
|
expand
|
|
}
|
|
|
|
class db_sequence
|
|
inherits database
|
|
{
|
|
get_value
|
|
next_value
|
|
set_value
|
|
}
|
|
|
|
class infiniband_pkey
|
|
{
|
|
access
|
|
}
|
|
|
|
class infiniband_endport
|
|
{
|
|
manage_subnet
|
|
}
|
|
|
|
class db_language
|
|
inherits database
|
|
{
|
|
implement
|
|
execute
|
|
}
|
|
|
|
class service
|
|
{
|
|
start
|
|
stop
|
|
status
|
|
reload
|
|
enable
|
|
disable
|
|
}
|
|
|
|
#
|
|
# Define the access vector interpretation for controlling capabilities
|
|
# in user namespaces
|
|
#
|
|
class cap_userns
|
|
inherits cap
|
|
|
|
class cap2_userns
|
|
inherits cap2
|
|
|
|
#
|
|
# Define the access vector interpretation for the new socket classes
|
|
# enabled by the extended_socket_class policy capability.
|
|
#
|
|
|
|
#
|
|
# The next two classes were previously mapped to rawip_socket and therefore
|
|
# have the same definition as rawip_socket (until further permissions
|
|
# are defined).
|
|
#
|
|
class sctp_socket
|
|
inherits socket
|
|
{
|
|
node_bind
|
|
name_connect
|
|
association
|
|
}
|
|
|
|
class icmp_socket
|
|
inherits socket
|
|
{
|
|
node_bind
|
|
}
|
|
|
|
#
|
|
# The remaining network socket classes were previously
|
|
# mapped to the socket class and therefore have the
|
|
# same definition as socket.
|
|
#
|
|
|
|
class ax25_socket
|
|
inherits socket
|
|
|
|
class ipx_socket
|
|
inherits socket
|
|
|
|
class netrom_socket
|
|
inherits socket
|
|
|
|
class atmpvc_socket
|
|
inherits socket
|
|
|
|
class x25_socket
|
|
inherits socket
|
|
|
|
class rose_socket
|
|
inherits socket
|
|
|
|
class decnet_socket
|
|
inherits socket
|
|
|
|
class atmsvc_socket
|
|
inherits socket
|
|
|
|
class rds_socket
|
|
inherits socket
|
|
|
|
class irda_socket
|
|
inherits socket
|
|
|
|
class pppox_socket
|
|
inherits socket
|
|
|
|
class llc_socket
|
|
inherits socket
|
|
|
|
class can_socket
|
|
inherits socket
|
|
|
|
class tipc_socket
|
|
inherits socket
|
|
|
|
class bluetooth_socket
|
|
inherits socket
|
|
|
|
class iucv_socket
|
|
inherits socket
|
|
|
|
class rxrpc_socket
|
|
inherits socket
|
|
|
|
class isdn_socket
|
|
inherits socket
|
|
|
|
class phonet_socket
|
|
inherits socket
|
|
|
|
class ieee802154_socket
|
|
inherits socket
|
|
|
|
class caif_socket
|
|
inherits socket
|
|
|
|
class alg_socket
|
|
inherits socket
|
|
|
|
class nfc_socket
|
|
inherits socket
|
|
|
|
class vsock_socket
|
|
inherits socket
|
|
|
|
class kcm_socket
|
|
inherits socket
|
|
|
|
class qipcrtr_socket
|
|
inherits socket
|
|
|
|
class smc_socket
|
|
inherits socket
|
|
|
|
class bpf
|
|
{
|
|
map_create
|
|
map_read
|
|
map_write
|
|
prog_load
|
|
prog_run
|
|
}
|
|
|
|
class xdp_socket
|
|
inherits socket
|