[refpolicy] [RFC/PATCH 1/1] Policy for Bacula

[cpebenito@tresys.com (Christopher J. PeBenito)]

On 12/28/11 14:05, Sven Vermeulen wrote:
> This adds a new SELinux module "bacula" for the bacula backup application. Directly mapping bacula on the existing backup
> module was not feasible (partially because it uses both a general domain and an administrative client domain).
> 
> Policy provided by Stan Sander through https://bugs.gentoo.org/show_bug.cgi?id=396241
> 
> Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
> ---
>  bacula.fc |   20 ++++++++++
>  bacula.if |   45 +++++++++++++++++++++++
>  bacula.te |  117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 182 insertions(+), 0 deletions(-)
>  create mode 100644 bacula.fc
>  create mode 100644 bacula.if
>  create mode 100644 bacula.te
> 
> diff --git a/bacula.fc b/bacula.fc
> new file mode 100644
> index 0000000..b44c547
> --- /dev/null
> +++ b/bacula.fc
> @@ -0,0 +1,20 @@
> +#
> +# /usr
> +#
> +/usr/sbin/bacula-(.*)?	--	gen_context(system_u:object_r:bacula_exec_t,s0)
> +/usr/sbin/bat			gen_context(system_u:object_r:bacula_admin_exec_t,s0)
> +/usr/sbin/bconsole		gen_context(system_u:object_r:bacula_admin_exec_t,s0)
> +
> +#
> +# /etc
> +#
> +/etc/bacula(/.*)?	--	gen_context(system_u:object_r:bacula_conf_t,s0)
> +
> +# 
> +# /var
> +#
> +/var/lib/bacula(/.*)?		gen_context(system_u:object_r:bacula_var_lib_t,s0)
> +
> +# A separate disk for backups mounted at /bacula or beginning with
> +# /bacula also matches a restore directory like /bacula-restores
> +/bacula(.*)?			gen_context(system_u:object_r:bacula_store_t,s0)
> diff --git a/bacula.if b/bacula.if
> new file mode 100644
> index 0000000..d7f695c
> --- /dev/null
> +++ b/bacula.if
> @@ -0,0 +1,45 @@
> +## <summary>bacula backup program</summary>
> +
> +########################################
> +## <summary>
> +##	Execute user interfaces in the bacula_admin domain.
> +## </summary>
> +## <param name="domain">
> +##	<summary>
> +##	Domain allowed to transition.
> +##	</summary>
> +## </param>
> +#
> +interface(`bacula_admin_domtrans',`

Should be bacula_domtrans_admin.

> +	gen_require(`
> +		type bacula_admin_t, bacula_admin_exec_t;
> +	')
> +
> +	domtrans_pattern($1, bacula_admin_exec_t, bacula_admin_t)
> +')
> +
> +########################################
> +## <summary>
> +##	Execute user interfaces in the bacula_admin domain, and
> +##	allow the specified role to transition to the bacula_admin domain.
> +## </summary>
> +## <param name="domain">
> +##	<summary>
> +##	Domain allowed to transition.
> +##	</summary>
> +## </param>
> +## <param name="role">
> +##	<summary>
> +##	Role allowed access.
> +##	</summary>
> +## </param>
> +## <rolecap/>
> +#
> +interface(`bacula_admin_run',`

Should be bacula_run_admin.

> +	gen_require(`
> +		type bacula_admin_t;
> +	')
> +
> +	bacula_admin_domtrans($1)
> +	role $2 types bacula_admin_t;
> +')
> diff --git a/bacula.te b/bacula.te
> new file mode 100644
> index 0000000..77e6ff1
> --- /dev/null
> +++ b/bacula.te
> @@ -0,0 +1,117 @@
> +policy_module(bacula, 1.0.0)
> +
> +########################################
> +#
> +# Declarations
> +#
> +
> +type bacula_t;
> +type bacula_exec_t;
> +init_daemon_domain(bacula_t, bacula_exec_t)
> +
> +type bacula_store_t;
> +files_type(bacula_store_t)
> +files_mountpoint(bacula_store_t)
> +
> +type bacula_var_lib_t;
> +files_type(bacula_var_lib_t)
> +
> +type bacula_var_run_t;
> +files_pid_file(bacula_var_run_t)
> +
> +type bacula_admin_t;
> +type bacula_admin_exec_t;
> +application_domain(bacula_admin_t, bacula_admin_exec_t)
> +
> +########################################
> +#
> +# Local policy - bacula daemon
> +#
> +
> +allow bacula_t self:capability { dac_read_search dac_override chown fowner fsetid};
> +allow bacula_t self:process signal;
> +allow bacula_t self:fifo_file rw_fifo_file_perms;
> +allow bacula_t self:tcp_socket create_stream_socket_perms;
> +allow bacula_t self:udp_socket create_socket_perms;
> +allow bacula_t self:netlink_route_socket create_netlink_socket_perms;
> +
> +allow bacula_t bacula_store_t:file setattr;

Looks like a redundant rule, though the below bacula_store_rules should be here.

> +allow bacula_t bacula_var_run_t:file { create_file_perms write_file_perms unlink};
> +
> +files_pid_filetrans(bacula_t, bacula_var_run_t, file)
> +files_var_lib_filetrans(bacula_t, bacula_var_lib_t, file)
> +
> +manage_files_pattern(bacula_t, bacula_store_t, bacula_store_t)
> +manage_lnk_files_pattern(bacula_t, bacula_store_t, bacula_store_t)
> +manage_dirs_pattern(bacula_t, bacula_store_t, bacula_store_t)
> +manage_files_pattern(bacula_t, bacula_var_lib_t, bacula_var_lib_t)
> +
> +kernel_read_kernel_sysctls(bacula_t)
> +kernel_read_system_state(bacula_t)
> +
> +corecmd_exec_bin(bacula_t)
> +corecmd_exec_shell(bacula_t)
> +
> +corenet_tcp_bind_generic_node(bacula_t)
> +corenet_udp_bind_generic_node(bacula_t)
> +corenet_tcp_bind_generic_port(bacula_t)
> +corenet_udp_bind_generic_port(bacula_t)
> +corenet_tcp_bind_hplip_port(bacula_t)
> +corenet_udp_bind_hplip_port(bacula_t)
> +corenet_tcp_connect_all_ports(bacula_t)
> +corenet_tcp_connect_smtp_port(bacula_t)
> +# Bacula's default port are listed already under hplip
> +
> +dev_getattr_all_blk_files(bacula_t)
> +dev_getattr_all_chr_files(bacula_t)
> +
> +files_dontaudit_getattr_all_sockets(bacula_t)
> +files_read_all_files(bacula_t)
> +files_read_all_symlinks(bacula_t)
> +
> +fs_getattr_xattr_fs(bacula_t)
> +fs_list_all(bacula_t)
> +
> +auth_read_shadow(bacula_t)
> +
> +logging_send_syslog_msg(bacula_t)
> +
> +optional_policy(`
> +	mysql_stream_connect(bacula_t)
> +	mysql_tcp_connect(bacula_t)
> +')
> +	
> +optional_policy(`
> +	nis_use_ypbind(bacula_t)
> +')
> +
> +optional_policy(`
> +	sysnet_use_ldap(bacula_t)
> +	ldap_stream_connect(bacula_t)
> +')
> +
> +
> +########################################
> +#
> +# Local policy - bacula admin client
> +#
> +allow bacula_admin_t self:process signal;
> +allow bacula_admin_t self:tcp_socket create_stream_socket_perms;
> +allow bacula_admin_t self:dgram_socket_class_set create_socket_perms;
> +
> +corenet_tcp_connect_hplip_port(bacula_admin_t)
> +corenet_udp_sendrecv_hplip_port(bacula_admin_t)
> +
> +domain_use_interactive_fds(bacula_admin_t)
> +
> +files_read_etc_files(bacula_admin_t)
> +
> +miscfiles_read_localization(bacula_admin_t)
> +
> +sysnet_dns_name_resolve(bacula_admin_t)
> +
> +userdom_dontaudit_search_user_home_dirs(bacula_admin_t)
> +userdom_use_user_ptys(bacula_admin_t)

Otherwise it seems ok.

-- 
Chris PeBenito
Tresys Technology, LLC
www.tresys.com | oss.tresys.com