policy/modules/services/clamav.te

   1
   2 policy_module(clamav, 1.8.0)
   3
   4 ## <desc>
   5 ## <p>
   6 ## Allow clamd to use JIT compiler
   7 ## </p>
   8 ## </desc>
   9 gen_tunable(clamd_use_jit, false)
  10
  11 ########################################
  12 #
  13 # Declarations
  14 #
  15
  16 # Main clamd domain
  17 type clamd_t;
  18 type clamd_exec_t;
  19 init_daemon_domain(clamd_t, clamd_exec_t)
  20
  21 # configuration files
  22 type clamd_etc_t;
  23 files_config_file(clamd_etc_t)
  24
  25 type clamd_initrc_exec_t;
  26 init_script_file(clamd_initrc_exec_t)
  27
  28 # tmp files
  29 type clamd_tmp_t;
  30 files_tmp_file(clamd_tmp_t)
  31
  32 # log files
  33 type clamd_var_log_t;
  34 logging_log_file(clamd_var_log_t)
  35
  36 # var/lib files
  37 type clamd_var_lib_t;
  38 files_type(clamd_var_lib_t)
  39
  40 # pid files
  41 type clamd_var_run_t;
  42 files_pid_file(clamd_var_run_t)
  43 typealias clamd_var_run_t alias clamd_sock_t;
  44
  45 type clamscan_t;
  46 type clamscan_exec_t;
  47 init_daemon_domain(clamscan_t, clamscan_exec_t)
  48
  49 # tmp files
  50 type clamscan_tmp_t;
  51 files_tmp_file(clamscan_tmp_t)
  52
  53 type freshclam_t;
  54 type freshclam_exec_t;
  55 init_daemon_domain(freshclam_t, freshclam_exec_t)
  56
  57 # log files
  58 type freshclam_var_log_t;
  59 logging_log_file(freshclam_var_log_t)
  60
  61 ########################################
  62 #
  63 # clamd local policy
  64 #
  65
  66 allow clamd_t self:capability { kill setgid setuid dac_override };
  67 dontaudit clamd_t self:capability sys_tty_config;
  68 allow clamd_t self:fifo_file rw_fifo_file_perms;
  69 allow clamd_t self:unix_stream_socket { create_stream_socket_perms connectto };
  70 allow clamd_t self:unix_dgram_socket create_socket_perms;
  71 allow clamd_t self:tcp_socket { listen accept };
  72
  73 # configuration files
  74 allow clamd_t clamd_etc_t:dir list_dir_perms;
  75 read_files_pattern(clamd_t, clamd_etc_t, clamd_etc_t)
  76 read_lnk_files_pattern(clamd_t, clamd_etc_t, clamd_etc_t)
  77
  78 # tmp files
  79 manage_dirs_pattern(clamd_t, clamd_tmp_t, clamd_tmp_t)
  80 manage_files_pattern(clamd_t, clamd_tmp_t, clamd_tmp_t)
  81 files_tmp_filetrans(clamd_t, clamd_tmp_t, { file dir })
  82
  83 # var/lib files for clamd
  84 manage_dirs_pattern(clamd_t, clamd_var_lib_t, clamd_var_lib_t)
  85 manage_files_pattern(clamd_t, clamd_var_lib_t, clamd_var_lib_t)
  86
  87 # log files
  88 manage_dirs_pattern(clamd_t, clamd_var_log_t, clamd_var_log_t)
  89 manage_files_pattern(clamd_t, clamd_var_log_t, clamd_var_log_t)
  90 logging_log_filetrans(clamd_t, clamd_var_log_t, { dir file })
  91
  92 # pid file
  93 manage_dirs_pattern(clamd_t, clamd_var_log_t, clamd_var_log_t)
  94 manage_files_pattern(clamd_t, clamd_var_run_t, clamd_var_run_t)
  95 manage_sock_files_pattern(clamd_t, clamd_var_run_t, clamd_var_run_t)
  96 files_pid_filetrans(clamd_t, clamd_var_run_t, { file dir })
  97
  98 kernel_dontaudit_list_proc(clamd_t)
  99 kernel_read_sysctl(clamd_t)
 100 kernel_read_kernel_sysctls(clamd_t)
 101 kernel_read_system_state(clamd_t)
 102
 103 corecmd_exec_shell(clamd_t)
 104
 105 corenet_all_recvfrom_unlabeled(clamd_t)
 106 corenet_all_recvfrom_netlabel(clamd_t)
 107 corenet_tcp_sendrecv_generic_if(clamd_t)
 108 corenet_tcp_sendrecv_generic_node(clamd_t)
 109 corenet_tcp_sendrecv_all_ports(clamd_t)
 110 corenet_tcp_sendrecv_clamd_port(clamd_t)
 111 corenet_tcp_bind_generic_node(clamd_t)
 112 corenet_tcp_bind_clamd_port(clamd_t)
 113 corenet_tcp_bind_generic_port(clamd_t)
 114 corenet_tcp_connect_generic_port(clamd_t)
 115 corenet_sendrecv_clamd_server_packets(clamd_t)
 116
 117 dev_read_rand(clamd_t)
 118 dev_read_urand(clamd_t)
 119
 120 domain_use_interactive_fds(clamd_t)
 121
 122 files_read_etc_files(clamd_t)
 123 files_read_etc_runtime_files(clamd_t)
 124 files_search_spool(clamd_t)
 125
 126 auth_use_nsswitch(clamd_t)
 127
 128 logging_send_syslog_msg(clamd_t)
 129
 130 miscfiles_read_localization(clamd_t)
 131
 132 cron_use_fds(clamd_t)
 133 cron_use_system_job_fds(clamd_t)
 134 cron_rw_pipes(clamd_t)
 135
 136 mta_read_config(clamd_t)
 137 mta_send_mail(clamd_t)
 138
 139 optional_policy(`
 140         amavis_read_lib_files(clamd_t)
 141         amavis_read_spool_files(clamd_t)
 142         amavis_spool_filetrans(clamd_t, clamd_var_run_t, sock_file)
 143         amavis_create_pid_files(clamd_t)
 144 ')
 145
 146 optional_policy(`
 147         exim_read_spool_files(clamd_t)
 148 ')
 149
 150 ########################################
 151 #
 152 # Freshclam local policy
 153 #
 154
 155 allow freshclam_t self:capability { setgid setuid dac_override };
 156 allow freshclam_t self:fifo_file rw_fifo_file_perms;
 157 allow freshclam_t self:unix_stream_socket create_stream_socket_perms;
 158 allow freshclam_t self:unix_dgram_socket create_socket_perms;
 159 allow freshclam_t self:tcp_socket { listen accept };
 160
 161 # configuration files
 162 allow freshclam_t clamd_etc_t:dir list_dir_perms;
 163 read_files_pattern(freshclam_t, clamd_etc_t, clamd_etc_t)
 164 read_lnk_files_pattern(freshclam_t, clamd_etc_t, clamd_etc_t)
 165
 166 # var/lib files together with clamd
 167 manage_dirs_pattern(freshclam_t, clamd_var_lib_t, clamd_var_lib_t)
 168 manage_files_pattern(freshclam_t, clamd_var_lib_t, clamd_var_lib_t)
 169
 170 # pidfiles- var/run together with clamd
 171 manage_files_pattern(freshclam_t, clamd_var_run_t, clamd_var_run_t)
 172 manage_sock_files_pattern(freshclam_t, clamd_var_run_t, clamd_var_run_t)
 173 files_pid_filetrans(freshclam_t, clamd_var_run_t, file)
 174
 175 # log files (own logfiles only)
 176 manage_files_pattern(freshclam_t, freshclam_var_log_t, freshclam_var_log_t)
 177 allow freshclam_t freshclam_var_log_t:dir setattr;
 178 allow freshclam_t clamd_var_log_t:dir search_dir_perms;
 179 logging_log_filetrans(freshclam_t, freshclam_var_log_t, file)
 180
 181 corenet_all_recvfrom_unlabeled(freshclam_t)
 182 corenet_all_recvfrom_netlabel(freshclam_t)
 183 corenet_tcp_sendrecv_generic_if(freshclam_t)
 184 corenet_tcp_sendrecv_generic_node(freshclam_t)
 185 corenet_tcp_sendrecv_all_ports(freshclam_t)
 186 corenet_tcp_sendrecv_clamd_port(freshclam_t)
 187 corenet_tcp_connect_http_port(freshclam_t)
 188 corenet_sendrecv_http_client_packets(freshclam_t)
 189
 190 dev_read_rand(freshclam_t)
 191 dev_read_urand(freshclam_t)
 192
 193 domain_use_interactive_fds(freshclam_t)
 194
 195 files_read_etc_files(freshclam_t)
 196 files_read_etc_runtime_files(freshclam_t)
 197
 198 auth_use_nsswitch(freshclam_t)
 199
 200 logging_send_syslog_msg(freshclam_t)
 201
 202 miscfiles_read_localization(freshclam_t)
 203
 204 clamav_stream_connect(freshclam_t)
 205
 206 optional_policy(`
 207         cron_system_entry(freshclam_t, freshclam_exec_t)
 208 ')
 209
 210 ########################################
 211 #
 212 # clamscam local policy
 213 #
 214
 215 allow clamscan_t self:capability { setgid setuid dac_override };
 216 allow clamscan_t self:fifo_file rw_file_perms;
 217 allow clamscan_t self:unix_stream_socket create_stream_socket_perms;
 218 allow clamscan_t self:unix_dgram_socket create_socket_perms;
 219 allow clamscan_t self:tcp_socket create_stream_socket_perms;
 220
 221 # configuration files
 222 allow clamscan_t clamd_etc_t:dir list_dir_perms;
 223 read_files_pattern(clamscan_t, clamd_etc_t, clamd_etc_t)
 224 read_lnk_files_pattern(clamscan_t, clamd_etc_t, clamd_etc_t)
 225
 226 # tmp files
 227 manage_dirs_pattern(clamscan_t, clamscan_tmp_t, clamscan_tmp_t)
 228 manage_files_pattern(clamscan_t, clamscan_tmp_t, clamscan_tmp_t)
 229 files_tmp_filetrans(clamscan_t, clamscan_tmp_t, { file dir })
 230
 231 # var/lib files together with clamd
 232 manage_files_pattern(clamscan_t, clamd_var_lib_t, clamd_var_lib_t)
 233 allow clamscan_t clamd_var_lib_t:dir list_dir_perms;
 234
 235 corenet_all_recvfrom_unlabeled(clamscan_t)
 236 corenet_all_recvfrom_netlabel(clamscan_t)
 237 corenet_tcp_sendrecv_generic_if(clamscan_t)
 238 corenet_tcp_sendrecv_generic_node(clamscan_t)
 239 corenet_tcp_sendrecv_all_ports(clamscan_t)
 240 corenet_tcp_sendrecv_clamd_port(clamscan_t)
 241 corenet_tcp_connect_clamd_port(clamscan_t)
 242
 243 kernel_read_kernel_sysctls(clamscan_t)
 244
 245 files_read_etc_files(clamscan_t)
 246 files_read_etc_runtime_files(clamscan_t)
 247 files_search_var_lib(clamscan_t)
 248
 249 init_read_utmp(clamscan_t)
 250 init_dontaudit_write_utmp(clamscan_t)
 251
 252 miscfiles_read_localization(clamscan_t)
 253 miscfiles_read_public_files(clamscan_t)
 254
 255 clamav_stream_connect(clamscan_t)
 256
 257 mta_send_mail(clamscan_t)
 258
 259 tunable_policy(`clamd_use_jit',`
 260         allow clamd_t self:process execmem;
 261 ', `
 262         dontaudit clamd_t self:process execmem;
 263 ')
 264
 265 optional_policy(`
 266         amavis_read_spool_files(clamscan_t)
 267 ')
 268
 269 optional_policy(`
 270         apache_read_sys_content(clamscan_t)
 271 ')