230 lines
6.2 KiB
Plaintext
230 lines
6.2 KiB
Plaintext
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policy_module(ssh,1.0)
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########################################
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#
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# Declarations
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#
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# Allow ssh logins as sysadm_r:sysadm_t
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bool ssh_sysadm_login false;
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# Allow ssh to run from inetd instead of as a daemon.
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bool run_ssh_inetd false;
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# Type for the ssh-agent executable.
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type ssh_agent_exec_t;
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files_file_type(ssh_agent_exec_t)
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# ssh client executable.
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type ssh_exec_t;
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files_file_type(ssh_exec_t)
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type ssh_keygen_t;
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type ssh_keygen_exec_t;
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init_daemon_domain(ssh_keygen_t,ssh_keygen_exec_t)
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role system_r types ssh_keygen_t;
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# ssh server executable
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type sshd_exec_t;
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files_file_type(sshd_exec_t)
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type sshd_key_t;
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files_file_type(sshd_key_t)
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type sshd_tmp_t;
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files_tmp_file(sshd_tmp_t)
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#################################
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#
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# sshd local policy
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#
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# sshd_t is the domain for the sshd program.
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#
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sshd_program_domain(sshd)
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allow sshd_t sshd_tmp_t:dir create_dir_perms;
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allow sshd_t sshd_tmp_t:file create_file_perms;
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allow sshd_t sshd_tmp_t:sock_file create_file_perms;
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files_create_tmp_files(sshd_t, sshd_tmp_t, { dir file sock_file })
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# for X forwarding
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corenet_tcp_bind_xserver_port(sshd_t)
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auth_exec_pam(sshd_t)
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seutil_read_config(sshd_t)
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ifdef(`TODO',`
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if (ssh_sysadm_login) {
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userdom_spec_domtrans_all_users(sshd_t)
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userdom_signal_all_users(sshd_t)
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ifdef(`xauth.te',`
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domain_trans(sshd_t, xauth_exec_t, userdomain)
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')
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# Relabel and access ptys created by sshd
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# ioctl is necessary for logout() processing for utmp entry and for w to
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# display the tty.
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# some versions of sshd on the new SE Linux require setattr
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allow sshd_t ptyfile:chr_file { relabelto read write getattr ioctl setattr };
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# inheriting stream sockets is needed for "ssh host command" as no pty
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# is allocated
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allow userdomain sshd_t:unix_stream_socket rw_stream_socket_perms;
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} else {
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userdom_spec_domtrans_unpriv_users(sshd_t)
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userdom_signal_unpriv_users(sshd_t)
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ifdef(`xauth.te',`
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domain_trans(sshd_t, xauth_exec_t, unpriv_userdomain)
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')
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# Relabel and access ptys created by sshd
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# ioctl is necessary for logout() processing for utmp entry and for w to
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# display the tty.
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# some versions of sshd on the new SE Linux require setattr
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allow sshd_t userpty_type:chr_file { relabelto read write getattr ioctl setattr };
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# inheriting stream sockets is needed for "ssh host command" as no pty
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# is allocated
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allow userdomain sshd_t:unix_stream_socket rw_stream_socket_perms;
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}
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# for when the network connection breaks after running newrole -r sysadm_r
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dontaudit sshd_t sysadm_devpts_t:chr_file setattr;
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# Allow checking users mail at login
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allow sshd_t { var_spool_t mail_spool_t }:dir search;
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allow sshd_t mail_spool_t:lnk_file read;
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allow sshd_t mail_spool_t:file getattr;
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') dnl endif TODO
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#################################
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#
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# sshd_extern local policy
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#
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# sshd_extern_t is the domain for ssh from outside our network
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#
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ifdef(`TODO',`
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sshd_program_domain(sshd_extern)
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domain_trans(sshd_extern_t, shell_exec_t, user_mini_domain)
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# Signal the user domains.
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allow sshd_extern_t user_mini_domain:process signal;
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ifdef(`xauth.te', `
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domain_trans(sshd_extern_t, xauth_exec_t, user_mini_domain)
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')
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# Relabel and access ptys created by sshd
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# ioctl is necessary for logout() processing for utmp entry and for w to
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# display the tty.
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# some versions of sshd on the new SE Linux require setattr
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allow sshd_extern_t user_mini_domain:chr_file { relabelto read write getattr ioctl setattr };
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# inheriting stream sockets is needed for "ssh host command" as no pty
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# is allocated
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allow user_mini_domain sshd_extern_t:unix_stream_socket rw_stream_socket_perms;
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optional_policy(`inetd.te',`
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if (run_ssh_inetd) {
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allow inetd_t ssh_port_t:tcp_socket name_bind;
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domain_auto_trans(inetd_t, sshd_exec_t, sshd_t)
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domain_trans(inetd_t, sshd_exec_t, sshd_extern_t)
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} else {
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domain_auto_trans(initrc_t, sshd_exec_t, sshd_t)
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domain_trans(initrc_t, sshd_exec_t, sshd_extern_t)
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dontaudit initrc_t sshd_key_t:file { getattr read };
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}
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',`
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# These rules should match the else block
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# of the run_ssh_inetd conditional directly above
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domain_auto_trans(initrc_t, sshd_exec_t, sshd_t)
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domain_trans(initrc_t, sshd_exec_t, sshd_extern_t)
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dontaudit initrc_t sshd_key_t:file { getattr read };
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')
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ifdef(`direct_sysadm_daemon', `
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# Direct execution by sysadm_r.
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domain_auto_trans(sysadm_t, sshd_exec_t, sshd_t)
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role_transition sysadm_r sshd_exec_t system_r;
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')
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# so a tunnel can point to another ssh tunnel...
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allow sshd_t self:tcp_socket { acceptfrom connectto recvfrom };
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allow sshd_t kernel_t:tcp_socket recvfrom;
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allow sshd_t kernel_t:tcp_socket recvfrom;
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# for port forwarding
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allow userdomain sshd_t:tcp_socket { connectto recvfrom };
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allow sshd_t userdomain:tcp_socket { acceptfrom recvfrom };
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allow userdomain kernel_t:tcp_socket recvfrom;
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allow sshd_t kernel_t:tcp_socket recvfrom;
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') dnl endif TODO
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########################################
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#
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# ssh_keygen local policy
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#
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# ssh_keygen_t is the type of the ssh-keygen program when run at install time
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# and by sysadm_t
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dontaudit ssh_keygen_t self:capability sys_tty_config;
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allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal };
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allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms;
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allow ssh_keygen_t sshd_key_t:file create_file_perms;
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files_create_etc_config(ssh_keygen_t,sshd_key_t,file)
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kernel_read_kernel_sysctl(ssh_keygen_t)
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dev_read_sysfs(ssh_keygen_t)
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dev_read_urand(ssh_keygen_t)
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term_dontaudit_use_console(ssh_keygen_t)
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domain_use_wide_inherit_fd(ssh_keygen_t)
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files_read_generic_etc_files(ssh_keygen_t)
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init_use_fd(ssh_keygen_t)
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init_use_script_pty(ssh_keygen_t)
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libs_use_ld_so(ssh_keygen_t)
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libs_use_shared_libs(ssh_keygen_t)
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logging_send_syslog_msg(ssh_keygen_t)
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allow ssh_keygen_t proc_t:dir r_dir_perms;
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allow ssh_keygen_t proc_t:lnk_file read;
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userdom_use_sysadm_tty(ssh_keygen_t)
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userdom_dontaudit_use_unpriv_user_fd(ssh_keygen_t)
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ifdef(`direct_sysadm_daemon',`
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userdom_dontaudit_use_sysadm_terms(ssh_keygen_t)
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')
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ifdef(`targeted_policy', `
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term_dontaudit_use_unallocated_tty(ssh_keygen_t)
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term_dontaudit_use_generic_pty(ssh_keygen_t)
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files_dontaudit_read_root_file(ssh_keygen_t)
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')
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optional_policy(`rhgb.te', `
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rhgb_domain(ssh_keygen_t)
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')
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optional_policy(`selinux.te',`
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seutil_newrole_sigchld(ssh_keygen_t)
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')
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optional_policy(`udev.te', `
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udev_read_db(ssh_keygen_t)
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')
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ifdef(`TODO',`
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allow ssh_keygen_t autofs_t:dir { search getattr };
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')
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