1 # FLASK 2 3 # 4 # Define the security object classes 5 # 6 7 class security 8 class process 9 class system 10 class capability 11 12 # file-related classes 13 class filesystem 14 class file 15 class dir 16 class fd 17 class lnk_file 18 class chr_file 19 class blk_file 20 class sock_file 21 class fifo_file 22 23 # network-related classes 24 class socket 25 class tcp_socket 26 class udp_socket 27 class rawip_socket 28 class node 29 class netif 30 class netlink_socket 31 class packet_socket 32 class key_socket 33 class unix_stream_socket 34 class unix_dgram_socket 35 36 # sysv-ipc-related clases 37 class sem 38 class msg 39 class msgq 40 class shm 41 class ipc 42 43 # FLASK 44 # FLASK 45 46 # 47 # Define initial security identifiers 48 # 49 50 sid kernel 51 52 53 # FLASK 54 # 55 # Define common prefixes for access vectors 56 # 57 # common common_name { permission_name ... } 58 59 60 # 61 # Define a common prefix for file access vectors. 62 # 63 64 common file 65 { 66 ioctl 67 read 68 write 69 create 70 getattr 71 setattr 72 lock 73 relabelfrom 74 relabelto 75 append 76 unlink 77 link 78 rename 79 execute 80 swapon 81 quotaon 82 mounton 83 } 84 85 86 # 87 # Define a common prefix for socket access vectors. 88 # 89 90 common socket 91 { 92 # inherited from file 93 ioctl 94 read 95 write 96 create 97 getattr 98 setattr 99 lock 100 relabelfrom 101 relabelto 102 append 103 # socket-specific 104 bind 105 connect 106 listen 107 accept 108 getopt 109 setopt 110 shutdown 111 recvfrom 112 sendto 113 recv_msg 114 send_msg 115 name_bind 116 } 117 118 # 119 # Define a common prefix for ipc access vectors. 120 # 121 122 common ipc 123 { 124 create 125 destroy 126 getattr 127 setattr 128 read 129 write 130 associate 131 unix_read 132 unix_write 133 } 134 135 # 136 # Define the access vectors. 137 # 138 # class class_name [ inherits common_name ] { permission_name ... } 139 140 141 # 142 # Define the access vector interpretation for file-related objects. 143 # 144 145 class filesystem 146 { 147 mount 148 remount 149 unmount 150 getattr 151 relabelfrom 152 relabelto 153 transition 154 associate 155 quotamod 156 quotaget 157 } 158 159 class dir 160 inherits file 161 { 162 add_name 163 remove_name 164 reparent 165 search 166 rmdir 167 } 168 169 class file 170 inherits file 171 { 172 execute_no_trans 173 entrypoint 174 } 175 176 class lnk_file 177 inherits file 178 179 class chr_file 180 inherits file 181 182 class blk_file 183 inherits file 184 185 class sock_file 186 inherits file 187 188 class fifo_file 189 inherits file 190 191 class fd 192 { 193 use 194 } 195 196 197 # 198 # Define the access vector interpretation for network-related objects. 199 # 200 201 class socket 202 inherits socket 203 204 class tcp_socket 205 inherits socket 206 { 207 connectto 208 newconn 209 acceptfrom 210 } 211 212 class udp_socket 213 inherits socket 214 215 class rawip_socket 216 inherits socket 217 218 class node 219 { 220 tcp_recv 221 tcp_send 222 udp_recv 223 udp_send 224 rawip_recv 225 rawip_send 226 enforce_dest 227 } 228 229 class netif 230 { 231 tcp_recv 232 tcp_send 233 udp_recv 234 udp_send 235 rawip_recv 236 rawip_send 237 } 238 239 class netlink_socket 240 inherits socket 241 242 class packet_socket 243 inherits socket 244 245 class key_socket 246 inherits socket 247 248 class unix_stream_socket 249 inherits socket 250 { 251 connectto 252 newconn 253 acceptfrom 254 } 255 256 class unix_dgram_socket 257 inherits socket 258 259 260 # 261 # Define the access vector interpretation for process-related objects 262 # 263 264 class process 265 { 266 fork 267 transition 268 sigchld # commonly granted from child to parent 269 sigkill # cannot be caught or ignored 270 sigstop # cannot be caught or ignored 271 signull # for kill(pid, 0) 272 signal # all other signals 273 ptrace 274 getsched 275 setsched 276 getsession 277 getpgid 278 setpgid 279 getcap 280 setcap 281 share 282 } 283 284 285 # 286 # Define the access vector interpretation for ipc-related objects 287 # 288 289 class ipc 290 inherits ipc 291 292 class sem 293 inherits ipc 294 295 class msgq 296 inherits ipc 297 { 298 enqueue 299 } 300 301 class msg 302 { 303 send 304 receive 305 } 306 307 class shm 308 inherits ipc 309 { 310 lock 311 } 312 313 314 # 315 # Define the access vector interpretation for the security server. 316 # 317 318 class security 319 { 320 compute_av 321 transition_sid 322 member_sid 323 sid_to_context 324 context_to_sid 325 load_policy 326 get_sids 327 change_sid 328 get_user_sids 329 } 330 331 332 # 333 # Define the access vector interpretation for system operations. 334 # 335 336 class system 337 { 338 ipc_info 339 avc_toggle 340 nfsd_control 341 bdflush 342 syslog_read 343 syslog_mod 344 syslog_console 345 ichsid 346 } 347 348 # 349 # Define the access vector interpretation for controling capabilies 350 # 351 352 class capability 353 { 354 # The capabilities are defined in include/linux/capability.h 355 # Care should be taken to ensure that these are consistent with 356 # those definitions. (Order matters) 357 358 chown 359 dac_override 360 dac_read_search 361 fowner 362 fsetid 363 kill 364 setgid 365 setuid 366 setpcap 367 linux_immutable 368 net_bind_service 369 net_broadcast 370 net_admin 371 net_raw 372 ipc_lock 373 ipc_owner 374 sys_module 375 sys_rawio 376 sys_chroot 377 sys_ptrace 378 sys_pacct 379 sys_admin 380 sys_boot 381 sys_nice 382 sys_resource 383 sys_time 384 sys_tty_config 385 mknod 386 lease 387 } 388 389 ifdef(`enable_mls',` 390 sensitivity s0; 391 392 # 393 # Define the ordering of the sensitivity levels (least to greatest) 394 # 395 dominance { s0 } 396 397 398 # 399 # Define the categories 400 # 401 # Each category has a name and zero or more aliases. 402 # 403 category c0; category c1; category c2; category c3; 404 category c4; category c5; category c6; category c7; 405 category c8; category c9; category c10; category c11; 406 category c12; category c13; category c14; category c15; 407 category c16; category c17; category c18; category c19; 408 category c20; category c21; category c22; category c23; 409 410 level s0:c0.c23; 411 412 mlsconstrain file { write setattr append unlink link rename ioctl lock execute relabelfrom } 413 ( h1 dom h2 ); 414 ') 415 416 type enable_optional; 417 418 # Alias tests 419 type alias_check_1_t; 420 type alias_check_2_t; 421 type alias_check_3_t; 422 423 typealias alias_check_1_t alias alias_check_1_a; 424 425 optional { 426 require { 427 type alias_check_2_t; 428 } 429 typealias alias_check_2_t alias alias_check_2_a; 430 } 431 432 optional { 433 require { 434 type alias_check_3_a; 435 } 436 allow alias_check_3_a enable_optional:file read; 437 } 438 439 ######## 440 type fs_t; 441 type system_t; 442 type user_t; 443 role system_r; 444 role user_r; 445 role sysadm_r; 446 role system_r types system_t; 447 role user_r types user_t; 448 role sysadm_r types system_t; 449 #################################### 450 # Booleans 451 bool allow_ypbind true; 452 bool secure_mode false; 453 bool allow_execheap false; 454 bool allow_execmem true; 455 bool allow_execmod false; 456 bool allow_execstack true; 457 bool optional_bool_1 true; 458 bool optional_bool_2 false; 459 460 ##################################### 461 # users 462 gen_user(system_u,, system_r, s0, s0 - s0:c0.c23) 463 gen_user(root,, user_r sysadm_r, s0, s0 - s0:c0.c23) 464 gen_user(joe,, user_r, s0, s0 - s0:c0.c23) 465 466 ##################################### 467 # constraints 468 469 470 #################################### 471 #line 1 "initial_sid_contexts" 472 473 sid kernel gen_context(system_u:system_r:system_t, s0) 474 475 476 ############################################ 477 #line 1 "fs_use" 478 # 479 fs_use_xattr ext2 gen_context(system_u:object_r:fs_t, s0); 480 fs_use_xattr ext3 gen_context(system_u:object_r:fs_t, s0); 481 fs_use_xattr reiserfs gen_context(system_u:object_r:fs_t, s0); 482 483 484 genfscon proc / gen_context(system_u:object_r:system_t, s0) 485 486 487 #################################### 488 #line 1 "net_contexts" 489 490 #portcon tcp 21 system_u:object_r:net_foo_t:s0 491 492 #netifcon lo system_u:object_r:net_foo_t system_u:object_r:net_foo_t:s0 493 494 # 495 #nodecon 127.0.0.1 255.255.255.255 system_u:object_r:net_foo_t:s0 496 497 nodecon ::1 FFFF:FFFF:FFFF:FFFF:: gen_context(system_u:object_r:system_t, s0) 498 499 500 501 502
