| 1 | /* $NetBSD: secmodel_suser.c,v 1.42 2015/08/17 06:16:03 knakahara Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (c) 2006 Elad Efrat <elad@NetBSD.org> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * This file contains kauth(9) listeners needed to implement the traditional |
| 31 | * NetBSD superuser access restrictions. |
| 32 | * |
| 33 | * There are two main resources a request can be issued to: user-owned and |
| 34 | * system owned. For the first, traditional Unix access checks are done, as |
| 35 | * well as superuser checks. If needed, the request context is examined before |
| 36 | * a decision is made. For the latter, usually only superuser checks are done |
| 37 | * as normal users are not allowed to access system resources. |
| 38 | */ |
| 39 | |
| 40 | #include <sys/cdefs.h> |
| 41 | __KERNEL_RCSID(0, "$NetBSD: secmodel_suser.c,v 1.42 2015/08/17 06:16:03 knakahara Exp $" ); |
| 42 | |
| 43 | #include <sys/types.h> |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/kauth.h> |
| 46 | |
| 47 | #include <sys/mutex.h> |
| 48 | #include <sys/mount.h> |
| 49 | #include <sys/socketvar.h> |
| 50 | #include <sys/sysctl.h> |
| 51 | #include <sys/vnode.h> |
| 52 | #include <sys/proc.h> |
| 53 | #include <sys/module.h> |
| 54 | |
| 55 | #include <secmodel/secmodel.h> |
| 56 | #include <secmodel/suser/suser.h> |
| 57 | |
| 58 | MODULE(MODULE_CLASS_SECMODEL, suser, NULL); |
| 59 | |
| 60 | static kauth_listener_t l_generic, l_system, l_process, l_network, l_machdep, |
| 61 | l_device, l_vnode; |
| 62 | |
| 63 | static secmodel_t suser_sm; |
| 64 | static struct sysctllog *suser_sysctl_log; |
| 65 | |
| 66 | void |
| 67 | sysctl_security_suser_setup(struct sysctllog **clog) |
| 68 | { |
| 69 | const struct sysctlnode *rnode; |
| 70 | |
| 71 | sysctl_createv(clog, 0, NULL, &rnode, |
| 72 | CTLFLAG_PERMANENT, |
| 73 | CTLTYPE_NODE, "models" , NULL, |
| 74 | NULL, 0, NULL, 0, |
| 75 | CTL_SECURITY, CTL_CREATE, CTL_EOL); |
| 76 | |
| 77 | sysctl_createv(clog, 0, &rnode, &rnode, |
| 78 | CTLFLAG_PERMANENT, |
| 79 | CTLTYPE_NODE, "suser" , NULL, |
| 80 | NULL, 0, NULL, 0, |
| 81 | CTL_CREATE, CTL_EOL); |
| 82 | |
| 83 | sysctl_createv(clog, 0, &rnode, NULL, |
| 84 | CTLFLAG_PERMANENT, |
| 85 | CTLTYPE_STRING, "name" , NULL, |
| 86 | NULL, 0, __UNCONST(SECMODEL_SUSER_NAME), 0, |
| 87 | CTL_CREATE, CTL_EOL); |
| 88 | } |
| 89 | |
| 90 | void |
| 91 | secmodel_suser_init(void) |
| 92 | { |
| 93 | |
| 94 | } |
| 95 | |
| 96 | void |
| 97 | secmodel_suser_start(void) |
| 98 | { |
| 99 | l_generic = kauth_listen_scope(KAUTH_SCOPE_GENERIC, |
| 100 | secmodel_suser_generic_cb, NULL); |
| 101 | l_system = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, |
| 102 | secmodel_suser_system_cb, NULL); |
| 103 | l_process = kauth_listen_scope(KAUTH_SCOPE_PROCESS, |
| 104 | secmodel_suser_process_cb, NULL); |
| 105 | l_network = kauth_listen_scope(KAUTH_SCOPE_NETWORK, |
| 106 | secmodel_suser_network_cb, NULL); |
| 107 | l_machdep = kauth_listen_scope(KAUTH_SCOPE_MACHDEP, |
| 108 | secmodel_suser_machdep_cb, NULL); |
| 109 | l_device = kauth_listen_scope(KAUTH_SCOPE_DEVICE, |
| 110 | secmodel_suser_device_cb, NULL); |
| 111 | l_vnode = kauth_listen_scope(KAUTH_SCOPE_VNODE, |
| 112 | secmodel_suser_vnode_cb, NULL); |
| 113 | } |
| 114 | |
| 115 | void |
| 116 | secmodel_suser_stop(void) |
| 117 | { |
| 118 | kauth_unlisten_scope(l_generic); |
| 119 | kauth_unlisten_scope(l_system); |
| 120 | kauth_unlisten_scope(l_process); |
| 121 | kauth_unlisten_scope(l_network); |
| 122 | kauth_unlisten_scope(l_machdep); |
| 123 | kauth_unlisten_scope(l_device); |
| 124 | kauth_unlisten_scope(l_vnode); |
| 125 | } |
| 126 | |
| 127 | static bool |
| 128 | suser_isroot(kauth_cred_t cred) |
| 129 | { |
| 130 | return kauth_cred_geteuid(cred) == 0; |
| 131 | } |
| 132 | |
| 133 | static int |
| 134 | suser_eval(const char *what, void *arg, void *ret) |
| 135 | { |
| 136 | int error = 0; |
| 137 | |
| 138 | if (strcasecmp(what, "is-root" ) == 0) { |
| 139 | kauth_cred_t cred = arg; |
| 140 | bool *bp = ret; |
| 141 | |
| 142 | *bp = suser_isroot(cred); |
| 143 | } else { |
| 144 | error = ENOENT; |
| 145 | } |
| 146 | |
| 147 | return error; |
| 148 | } |
| 149 | |
| 150 | static int |
| 151 | suser_modcmd(modcmd_t cmd, void *arg) |
| 152 | { |
| 153 | int error = 0; |
| 154 | |
| 155 | switch (cmd) { |
| 156 | case MODULE_CMD_INIT: |
| 157 | error = secmodel_register(&suser_sm, |
| 158 | SECMODEL_SUSER_ID, SECMODEL_SUSER_NAME, |
| 159 | NULL, suser_eval, NULL); |
| 160 | if (error != 0) |
| 161 | printf("suser_modcmd::init: secmodel_register " |
| 162 | "returned %d\n" , error); |
| 163 | |
| 164 | secmodel_suser_init(); |
| 165 | secmodel_suser_start(); |
| 166 | sysctl_security_suser_setup(&suser_sysctl_log); |
| 167 | break; |
| 168 | |
| 169 | case MODULE_CMD_FINI: |
| 170 | sysctl_teardown(&suser_sysctl_log); |
| 171 | secmodel_suser_stop(); |
| 172 | |
| 173 | error = secmodel_deregister(suser_sm); |
| 174 | if (error != 0) |
| 175 | printf("suser_modcmd::fini: secmodel_deregister " |
| 176 | "returned %d\n" , error); |
| 177 | |
| 178 | break; |
| 179 | |
| 180 | case MODULE_CMD_AUTOUNLOAD: |
| 181 | error = EPERM; |
| 182 | break; |
| 183 | |
| 184 | default: |
| 185 | error = ENOTTY; |
| 186 | break; |
| 187 | } |
| 188 | |
| 189 | return (error); |
| 190 | } |
| 191 | |
| 192 | /* |
| 193 | * kauth(9) listener |
| 194 | * |
| 195 | * Security model: Traditional NetBSD |
| 196 | * Scope: Generic |
| 197 | * Responsibility: Superuser access |
| 198 | */ |
| 199 | int |
| 200 | secmodel_suser_generic_cb(kauth_cred_t cred, kauth_action_t action, |
| 201 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 202 | { |
| 203 | bool isroot; |
| 204 | int result; |
| 205 | |
| 206 | isroot = suser_isroot(cred); |
| 207 | result = KAUTH_RESULT_DEFER; |
| 208 | |
| 209 | switch (action) { |
| 210 | case KAUTH_GENERIC_ISSUSER: |
| 211 | if (isroot) |
| 212 | result = KAUTH_RESULT_ALLOW; |
| 213 | break; |
| 214 | |
| 215 | default: |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | return (result); |
| 220 | } |
| 221 | |
| 222 | /* |
| 223 | * kauth(9) listener |
| 224 | * |
| 225 | * Security model: Traditional NetBSD |
| 226 | * Scope: System |
| 227 | * Responsibility: Superuser access |
| 228 | */ |
| 229 | int |
| 230 | secmodel_suser_system_cb(kauth_cred_t cred, kauth_action_t action, |
| 231 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 232 | { |
| 233 | bool isroot; |
| 234 | int result; |
| 235 | enum kauth_system_req req; |
| 236 | |
| 237 | isroot = suser_isroot(cred); |
| 238 | result = KAUTH_RESULT_DEFER; |
| 239 | req = (enum kauth_system_req)arg0; |
| 240 | |
| 241 | switch (action) { |
| 242 | case KAUTH_SYSTEM_CPU: |
| 243 | switch (req) { |
| 244 | case KAUTH_REQ_SYSTEM_CPU_SETSTATE: |
| 245 | if (isroot) |
| 246 | result = KAUTH_RESULT_ALLOW; |
| 247 | |
| 248 | break; |
| 249 | |
| 250 | default: |
| 251 | break; |
| 252 | } |
| 253 | |
| 254 | break; |
| 255 | |
| 256 | case KAUTH_SYSTEM_DEVMAPPER: |
| 257 | if (isroot) |
| 258 | result = KAUTH_RESULT_ALLOW; |
| 259 | |
| 260 | break; |
| 261 | |
| 262 | case KAUTH_SYSTEM_FS_QUOTA: |
| 263 | switch (req) { |
| 264 | case KAUTH_REQ_SYSTEM_FS_QUOTA_GET: |
| 265 | case KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF: |
| 266 | case KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE: |
| 267 | case KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT: |
| 268 | if (isroot) |
| 269 | result = KAUTH_RESULT_ALLOW; |
| 270 | break; |
| 271 | |
| 272 | default: |
| 273 | break; |
| 274 | } |
| 275 | |
| 276 | break; |
| 277 | |
| 278 | case KAUTH_SYSTEM_SYSVIPC: |
| 279 | switch (req) { |
| 280 | case KAUTH_REQ_SYSTEM_SYSVIPC_BYPASS: |
| 281 | case KAUTH_REQ_SYSTEM_SYSVIPC_SHM_LOCK: |
| 282 | case KAUTH_REQ_SYSTEM_SYSVIPC_SHM_UNLOCK: |
| 283 | case KAUTH_REQ_SYSTEM_SYSVIPC_MSGQ_OVERSIZE: |
| 284 | if (isroot) |
| 285 | result = KAUTH_RESULT_ALLOW; |
| 286 | |
| 287 | break; |
| 288 | |
| 289 | default: |
| 290 | break; |
| 291 | } |
| 292 | |
| 293 | break; |
| 294 | |
| 295 | case KAUTH_SYSTEM_MOUNT: |
| 296 | switch (req) { |
| 297 | case KAUTH_REQ_SYSTEM_MOUNT_DEVICE: |
| 298 | case KAUTH_REQ_SYSTEM_MOUNT_GET: |
| 299 | case KAUTH_REQ_SYSTEM_MOUNT_NEW: |
| 300 | case KAUTH_REQ_SYSTEM_MOUNT_UNMOUNT: |
| 301 | case KAUTH_REQ_SYSTEM_MOUNT_UPDATE: |
| 302 | case KAUTH_REQ_SYSTEM_MOUNT_UMAP: |
| 303 | if (isroot) { |
| 304 | result = KAUTH_RESULT_ALLOW; |
| 305 | break; |
| 306 | } |
| 307 | |
| 308 | break; |
| 309 | |
| 310 | default: |
| 311 | break; |
| 312 | } |
| 313 | |
| 314 | break; |
| 315 | |
| 316 | case KAUTH_SYSTEM_MQUEUE: |
| 317 | if (isroot) |
| 318 | result = KAUTH_RESULT_ALLOW; |
| 319 | |
| 320 | break; |
| 321 | |
| 322 | case KAUTH_SYSTEM_PSET: |
| 323 | switch (req) { |
| 324 | case KAUTH_REQ_SYSTEM_PSET_ASSIGN: |
| 325 | case KAUTH_REQ_SYSTEM_PSET_BIND: |
| 326 | case KAUTH_REQ_SYSTEM_PSET_CREATE: |
| 327 | case KAUTH_REQ_SYSTEM_PSET_DESTROY: |
| 328 | if (isroot) |
| 329 | result = KAUTH_RESULT_ALLOW; |
| 330 | |
| 331 | break; |
| 332 | |
| 333 | default: |
| 334 | break; |
| 335 | } |
| 336 | |
| 337 | break; |
| 338 | |
| 339 | case KAUTH_SYSTEM_TIME: |
| 340 | switch (req) { |
| 341 | case KAUTH_REQ_SYSTEM_TIME_ADJTIME: |
| 342 | case KAUTH_REQ_SYSTEM_TIME_NTPADJTIME: |
| 343 | case KAUTH_REQ_SYSTEM_TIME_TIMECOUNTERS: |
| 344 | case KAUTH_REQ_SYSTEM_TIME_SYSTEM: |
| 345 | case KAUTH_REQ_SYSTEM_TIME_RTCOFFSET: |
| 346 | if (isroot) |
| 347 | result = KAUTH_RESULT_ALLOW; |
| 348 | break; |
| 349 | |
| 350 | default: |
| 351 | break; |
| 352 | } |
| 353 | break; |
| 354 | |
| 355 | case KAUTH_SYSTEM_SEMAPHORE: |
| 356 | if (isroot) |
| 357 | result = KAUTH_RESULT_ALLOW; |
| 358 | |
| 359 | break; |
| 360 | |
| 361 | case KAUTH_SYSTEM_SYSCTL: |
| 362 | switch (req) { |
| 363 | case KAUTH_REQ_SYSTEM_SYSCTL_ADD: |
| 364 | case KAUTH_REQ_SYSTEM_SYSCTL_DELETE: |
| 365 | case KAUTH_REQ_SYSTEM_SYSCTL_DESC: |
| 366 | case KAUTH_REQ_SYSTEM_SYSCTL_MODIFY: |
| 367 | case KAUTH_REQ_SYSTEM_SYSCTL_PRVT: |
| 368 | if (isroot) |
| 369 | result = KAUTH_RESULT_ALLOW; |
| 370 | break; |
| 371 | |
| 372 | default: |
| 373 | break; |
| 374 | } |
| 375 | |
| 376 | break; |
| 377 | |
| 378 | case KAUTH_SYSTEM_SWAPCTL: |
| 379 | case KAUTH_SYSTEM_ACCOUNTING: |
| 380 | case KAUTH_SYSTEM_REBOOT: |
| 381 | case KAUTH_SYSTEM_CHROOT: |
| 382 | case KAUTH_SYSTEM_FILEHANDLE: |
| 383 | case KAUTH_SYSTEM_MKNOD: |
| 384 | case KAUTH_SYSTEM_SETIDCORE: |
| 385 | case KAUTH_SYSTEM_MODULE: |
| 386 | case KAUTH_SYSTEM_FS_RESERVEDSPACE: |
| 387 | case KAUTH_SYSTEM_MAP_VA_ZERO: |
| 388 | case KAUTH_SYSTEM_FS_EXTATTR: |
| 389 | case KAUTH_SYSTEM_FS_SNAPSHOT: |
| 390 | if (isroot) |
| 391 | result = KAUTH_RESULT_ALLOW; |
| 392 | break; |
| 393 | |
| 394 | case KAUTH_SYSTEM_DEBUG: |
| 395 | switch (req) { |
| 396 | case KAUTH_REQ_SYSTEM_DEBUG_IPKDB: |
| 397 | if (isroot) |
| 398 | result = KAUTH_RESULT_ALLOW; |
| 399 | |
| 400 | break; |
| 401 | |
| 402 | default: |
| 403 | break; |
| 404 | } |
| 405 | |
| 406 | break; |
| 407 | |
| 408 | case KAUTH_SYSTEM_CHSYSFLAGS: |
| 409 | /* Deprecated. */ |
| 410 | if (isroot) |
| 411 | result = KAUTH_RESULT_ALLOW; |
| 412 | |
| 413 | break; |
| 414 | |
| 415 | case KAUTH_SYSTEM_VERIEXEC: |
| 416 | switch (req) { |
| 417 | case KAUTH_REQ_SYSTEM_VERIEXEC_ACCESS: |
| 418 | case KAUTH_REQ_SYSTEM_VERIEXEC_MODIFY: |
| 419 | if (isroot) |
| 420 | result = KAUTH_RESULT_ALLOW; |
| 421 | |
| 422 | break; |
| 423 | |
| 424 | default: |
| 425 | break; |
| 426 | } |
| 427 | |
| 428 | break; |
| 429 | |
| 430 | case KAUTH_SYSTEM_LFS: |
| 431 | switch (req) { |
| 432 | case KAUTH_REQ_SYSTEM_LFS_MARKV: |
| 433 | case KAUTH_REQ_SYSTEM_LFS_BMAPV: |
| 434 | case KAUTH_REQ_SYSTEM_LFS_SEGCLEAN: |
| 435 | case KAUTH_REQ_SYSTEM_LFS_SEGWAIT: |
| 436 | case KAUTH_REQ_SYSTEM_LFS_FCNTL: |
| 437 | if (isroot) |
| 438 | result = KAUTH_RESULT_ALLOW; |
| 439 | |
| 440 | default: |
| 441 | break; |
| 442 | } |
| 443 | |
| 444 | break; |
| 445 | |
| 446 | case KAUTH_SYSTEM_INTR: |
| 447 | switch (req) { |
| 448 | case KAUTH_REQ_SYSTEM_INTR_AFFINITY: |
| 449 | if (isroot) |
| 450 | result = KAUTH_RESULT_ALLOW; |
| 451 | |
| 452 | break; |
| 453 | |
| 454 | default: |
| 455 | break; |
| 456 | } |
| 457 | |
| 458 | break; |
| 459 | |
| 460 | default: |
| 461 | break; |
| 462 | } |
| 463 | |
| 464 | return (result); |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * kauth(9) listener |
| 469 | * |
| 470 | * Security model: Traditional NetBSD |
| 471 | * Scope: Process |
| 472 | * Responsibility: Superuser access |
| 473 | */ |
| 474 | int |
| 475 | secmodel_suser_process_cb(kauth_cred_t cred, kauth_action_t action, |
| 476 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 477 | { |
| 478 | bool isroot; |
| 479 | int result; |
| 480 | |
| 481 | isroot = suser_isroot(cred); |
| 482 | result = KAUTH_RESULT_DEFER; |
| 483 | |
| 484 | switch (action) { |
| 485 | case KAUTH_PROCESS_SIGNAL: |
| 486 | case KAUTH_PROCESS_KTRACE: |
| 487 | case KAUTH_PROCESS_PROCFS: |
| 488 | case KAUTH_PROCESS_PTRACE: |
| 489 | case KAUTH_PROCESS_SCHEDULER_GETPARAM: |
| 490 | case KAUTH_PROCESS_SCHEDULER_SETPARAM: |
| 491 | case KAUTH_PROCESS_SCHEDULER_GETAFFINITY: |
| 492 | case KAUTH_PROCESS_SCHEDULER_SETAFFINITY: |
| 493 | case KAUTH_PROCESS_SETID: |
| 494 | case KAUTH_PROCESS_KEVENT_FILTER: |
| 495 | case KAUTH_PROCESS_NICE: |
| 496 | case KAUTH_PROCESS_FORK: |
| 497 | case KAUTH_PROCESS_CORENAME: |
| 498 | case KAUTH_PROCESS_STOPFLAG: |
| 499 | if (isroot) |
| 500 | result = KAUTH_RESULT_ALLOW; |
| 501 | |
| 502 | break; |
| 503 | |
| 504 | case KAUTH_PROCESS_CANSEE: { |
| 505 | unsigned long req; |
| 506 | |
| 507 | req = (unsigned long)arg1; |
| 508 | |
| 509 | switch (req) { |
| 510 | case KAUTH_REQ_PROCESS_CANSEE_ARGS: |
| 511 | case KAUTH_REQ_PROCESS_CANSEE_ENTRY: |
| 512 | case KAUTH_REQ_PROCESS_CANSEE_OPENFILES: |
| 513 | if (isroot) { |
| 514 | result = KAUTH_RESULT_ALLOW; |
| 515 | break; |
| 516 | } |
| 517 | |
| 518 | break; |
| 519 | |
| 520 | case KAUTH_REQ_PROCESS_CANSEE_ENV: |
| 521 | if (isroot) |
| 522 | result = KAUTH_RESULT_ALLOW; |
| 523 | |
| 524 | break; |
| 525 | |
| 526 | default: |
| 527 | break; |
| 528 | } |
| 529 | |
| 530 | break; |
| 531 | } |
| 532 | |
| 533 | case KAUTH_PROCESS_RLIMIT: { |
| 534 | enum kauth_process_req req; |
| 535 | |
| 536 | req = (enum kauth_process_req)(unsigned long)arg1; |
| 537 | |
| 538 | switch (req) { |
| 539 | case KAUTH_REQ_PROCESS_RLIMIT_SET: |
| 540 | case KAUTH_REQ_PROCESS_RLIMIT_GET: |
| 541 | case KAUTH_REQ_PROCESS_RLIMIT_BYPASS: |
| 542 | if (isroot) |
| 543 | result = KAUTH_RESULT_ALLOW; |
| 544 | |
| 545 | break; |
| 546 | |
| 547 | default: |
| 548 | break; |
| 549 | } |
| 550 | |
| 551 | break; |
| 552 | } |
| 553 | |
| 554 | default: |
| 555 | break; |
| 556 | } |
| 557 | |
| 558 | return (result); |
| 559 | } |
| 560 | |
| 561 | /* |
| 562 | * kauth(9) listener |
| 563 | * |
| 564 | * Security model: Traditional NetBSD |
| 565 | * Scope: Network |
| 566 | * Responsibility: Superuser access |
| 567 | */ |
| 568 | int |
| 569 | secmodel_suser_network_cb(kauth_cred_t cred, kauth_action_t action, |
| 570 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 571 | { |
| 572 | bool isroot; |
| 573 | int result; |
| 574 | enum kauth_network_req req; |
| 575 | |
| 576 | isroot = suser_isroot(cred); |
| 577 | result = KAUTH_RESULT_DEFER; |
| 578 | req = (enum kauth_network_req)arg0; |
| 579 | |
| 580 | switch (action) { |
| 581 | case KAUTH_NETWORK_ALTQ: |
| 582 | switch (req) { |
| 583 | case KAUTH_REQ_NETWORK_ALTQ_AFMAP: |
| 584 | case KAUTH_REQ_NETWORK_ALTQ_BLUE: |
| 585 | case KAUTH_REQ_NETWORK_ALTQ_CBQ: |
| 586 | case KAUTH_REQ_NETWORK_ALTQ_CDNR: |
| 587 | case KAUTH_REQ_NETWORK_ALTQ_CONF: |
| 588 | case KAUTH_REQ_NETWORK_ALTQ_FIFOQ: |
| 589 | case KAUTH_REQ_NETWORK_ALTQ_HFSC: |
| 590 | case KAUTH_REQ_NETWORK_ALTQ_JOBS: |
| 591 | case KAUTH_REQ_NETWORK_ALTQ_PRIQ: |
| 592 | case KAUTH_REQ_NETWORK_ALTQ_RED: |
| 593 | case KAUTH_REQ_NETWORK_ALTQ_RIO: |
| 594 | case KAUTH_REQ_NETWORK_ALTQ_WFQ: |
| 595 | if (isroot) |
| 596 | result = KAUTH_RESULT_ALLOW; |
| 597 | break; |
| 598 | |
| 599 | default: |
| 600 | break; |
| 601 | } |
| 602 | |
| 603 | break; |
| 604 | |
| 605 | case KAUTH_NETWORK_BIND: |
| 606 | switch (req) { |
| 607 | case KAUTH_REQ_NETWORK_BIND_PORT: |
| 608 | case KAUTH_REQ_NETWORK_BIND_PRIVPORT: |
| 609 | if (isroot) |
| 610 | result = KAUTH_RESULT_ALLOW; |
| 611 | break; |
| 612 | |
| 613 | default: |
| 614 | break; |
| 615 | } |
| 616 | break; |
| 617 | |
| 618 | case KAUTH_NETWORK_FIREWALL: |
| 619 | switch (req) { |
| 620 | case KAUTH_REQ_NETWORK_FIREWALL_FW: |
| 621 | case KAUTH_REQ_NETWORK_FIREWALL_NAT: |
| 622 | if (isroot) |
| 623 | result = KAUTH_RESULT_ALLOW; |
| 624 | |
| 625 | break; |
| 626 | |
| 627 | default: |
| 628 | break; |
| 629 | } |
| 630 | break; |
| 631 | |
| 632 | case KAUTH_NETWORK_FORWSRCRT: |
| 633 | case KAUTH_NETWORK_ROUTE: |
| 634 | if (isroot) |
| 635 | result = KAUTH_RESULT_ALLOW; |
| 636 | |
| 637 | break; |
| 638 | |
| 639 | case KAUTH_NETWORK_INTERFACE: |
| 640 | switch (req) { |
| 641 | case KAUTH_REQ_NETWORK_INTERFACE_GET: |
| 642 | case KAUTH_REQ_NETWORK_INTERFACE_SET: |
| 643 | case KAUTH_REQ_NETWORK_INTERFACE_GETPRIV: |
| 644 | case KAUTH_REQ_NETWORK_INTERFACE_SETPRIV: |
| 645 | case KAUTH_REQ_NETWORK_INTERFACE_FIRMWARE: |
| 646 | if (isroot) |
| 647 | result = KAUTH_RESULT_ALLOW; |
| 648 | break; |
| 649 | |
| 650 | default: |
| 651 | break; |
| 652 | } |
| 653 | break; |
| 654 | |
| 655 | case KAUTH_NETWORK_INTERFACE_BRIDGE: |
| 656 | switch (req) { |
| 657 | case KAUTH_REQ_NETWORK_INTERFACE_BRIDGE_GETPRIV: |
| 658 | case KAUTH_REQ_NETWORK_INTERFACE_BRIDGE_SETPRIV: |
| 659 | if (isroot) |
| 660 | result = KAUTH_RESULT_ALLOW; |
| 661 | break; |
| 662 | |
| 663 | default: |
| 664 | break; |
| 665 | } |
| 666 | |
| 667 | break; |
| 668 | |
| 669 | case KAUTH_NETWORK_INTERFACE_PPP: |
| 670 | switch (req) { |
| 671 | case KAUTH_REQ_NETWORK_INTERFACE_PPP_ADD: |
| 672 | if (isroot) |
| 673 | result = KAUTH_RESULT_ALLOW; |
| 674 | break; |
| 675 | |
| 676 | default: |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | break; |
| 681 | |
| 682 | case KAUTH_NETWORK_INTERFACE_PVC: |
| 683 | switch (req) { |
| 684 | case KAUTH_REQ_NETWORK_INTERFACE_PVC_ADD: |
| 685 | if (isroot) |
| 686 | result = KAUTH_RESULT_ALLOW; |
| 687 | |
| 688 | break; |
| 689 | |
| 690 | default: |
| 691 | break; |
| 692 | } |
| 693 | |
| 694 | break; |
| 695 | |
| 696 | case KAUTH_NETWORK_INTERFACE_SLIP: |
| 697 | switch (req) { |
| 698 | case KAUTH_REQ_NETWORK_INTERFACE_SLIP_ADD: |
| 699 | if (isroot) |
| 700 | result = KAUTH_RESULT_ALLOW; |
| 701 | break; |
| 702 | |
| 703 | default: |
| 704 | break; |
| 705 | } |
| 706 | |
| 707 | break; |
| 708 | |
| 709 | case KAUTH_NETWORK_INTERFACE_STRIP: |
| 710 | switch (req) { |
| 711 | case KAUTH_REQ_NETWORK_INTERFACE_STRIP_ADD: |
| 712 | if (isroot) |
| 713 | result = KAUTH_RESULT_ALLOW; |
| 714 | break; |
| 715 | |
| 716 | default: |
| 717 | break; |
| 718 | } |
| 719 | |
| 720 | break; |
| 721 | |
| 722 | case KAUTH_NETWORK_INTERFACE_TUN: |
| 723 | switch (req) { |
| 724 | case KAUTH_REQ_NETWORK_INTERFACE_TUN_ADD: |
| 725 | if (isroot) |
| 726 | result = KAUTH_RESULT_ALLOW; |
| 727 | break; |
| 728 | |
| 729 | default: |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | break; |
| 734 | |
| 735 | case KAUTH_NETWORK_IPV6: |
| 736 | switch (req) { |
| 737 | case KAUTH_REQ_NETWORK_IPV6_HOPBYHOP: |
| 738 | case KAUTH_REQ_NETWORK_IPV6_JOIN_MULTICAST: |
| 739 | if (isroot) |
| 740 | result = KAUTH_RESULT_ALLOW; |
| 741 | |
| 742 | break; |
| 743 | |
| 744 | default: |
| 745 | break; |
| 746 | } |
| 747 | |
| 748 | break; |
| 749 | |
| 750 | case KAUTH_NETWORK_NFS: |
| 751 | switch (req) { |
| 752 | case KAUTH_REQ_NETWORK_NFS_EXPORT: |
| 753 | case KAUTH_REQ_NETWORK_NFS_SVC: |
| 754 | if (isroot) |
| 755 | result = KAUTH_RESULT_ALLOW; |
| 756 | |
| 757 | break; |
| 758 | |
| 759 | default: |
| 760 | break; |
| 761 | } |
| 762 | break; |
| 763 | |
| 764 | case KAUTH_NETWORK_SMB: |
| 765 | switch (req) { |
| 766 | case KAUTH_REQ_NETWORK_SMB_SHARE_ACCESS: |
| 767 | case KAUTH_REQ_NETWORK_SMB_SHARE_CREATE: |
| 768 | case KAUTH_REQ_NETWORK_SMB_VC_ACCESS: |
| 769 | case KAUTH_REQ_NETWORK_SMB_VC_CREATE: |
| 770 | if (isroot) |
| 771 | result = KAUTH_RESULT_ALLOW; |
| 772 | |
| 773 | break; |
| 774 | |
| 775 | default: |
| 776 | break; |
| 777 | } |
| 778 | |
| 779 | break; |
| 780 | |
| 781 | case KAUTH_NETWORK_SOCKET: |
| 782 | switch (req) { |
| 783 | case KAUTH_REQ_NETWORK_SOCKET_DROP: |
| 784 | case KAUTH_REQ_NETWORK_SOCKET_OPEN: |
| 785 | case KAUTH_REQ_NETWORK_SOCKET_RAWSOCK: |
| 786 | case KAUTH_REQ_NETWORK_SOCKET_SETPRIV: |
| 787 | if (isroot) |
| 788 | result = KAUTH_RESULT_ALLOW; |
| 789 | break; |
| 790 | |
| 791 | case KAUTH_REQ_NETWORK_SOCKET_CANSEE: |
| 792 | if (isroot) { |
| 793 | result = KAUTH_RESULT_ALLOW; |
| 794 | break; |
| 795 | } |
| 796 | |
| 797 | break; |
| 798 | |
| 799 | default: |
| 800 | break; |
| 801 | } |
| 802 | |
| 803 | break; |
| 804 | |
| 805 | case KAUTH_NETWORK_IPSEC: |
| 806 | switch (req) { |
| 807 | case KAUTH_REQ_NETWORK_IPSEC_BYPASS: |
| 808 | if (isroot) |
| 809 | result = KAUTH_RESULT_ALLOW; |
| 810 | |
| 811 | break; |
| 812 | |
| 813 | default: |
| 814 | break; |
| 815 | } |
| 816 | |
| 817 | break; |
| 818 | |
| 819 | default: |
| 820 | break; |
| 821 | } |
| 822 | |
| 823 | return (result); |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * kauth(9) listener |
| 828 | * |
| 829 | * Security model: Traditional NetBSD |
| 830 | * Scope: Machdep |
| 831 | * Responsibility: Superuser access |
| 832 | */ |
| 833 | int |
| 834 | secmodel_suser_machdep_cb(kauth_cred_t cred, kauth_action_t action, |
| 835 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 836 | { |
| 837 | bool isroot; |
| 838 | int result; |
| 839 | |
| 840 | isroot = suser_isroot(cred); |
| 841 | result = KAUTH_RESULT_DEFER; |
| 842 | |
| 843 | switch (action) { |
| 844 | case KAUTH_MACHDEP_CPU_UCODE_APPLY: |
| 845 | case KAUTH_MACHDEP_IOPERM_GET: |
| 846 | case KAUTH_MACHDEP_LDT_GET: |
| 847 | case KAUTH_MACHDEP_LDT_SET: |
| 848 | case KAUTH_MACHDEP_MTRR_GET: |
| 849 | case KAUTH_MACHDEP_CACHEFLUSH: |
| 850 | case KAUTH_MACHDEP_IOPERM_SET: |
| 851 | case KAUTH_MACHDEP_IOPL: |
| 852 | case KAUTH_MACHDEP_MTRR_SET: |
| 853 | case KAUTH_MACHDEP_NVRAM: |
| 854 | case KAUTH_MACHDEP_UNMANAGEDMEM: |
| 855 | case KAUTH_MACHDEP_PXG: |
| 856 | if (isroot) |
| 857 | result = KAUTH_RESULT_ALLOW; |
| 858 | break; |
| 859 | |
| 860 | default: |
| 861 | break; |
| 862 | } |
| 863 | |
| 864 | return (result); |
| 865 | } |
| 866 | |
| 867 | /* |
| 868 | * kauth(9) listener |
| 869 | * |
| 870 | * Security model: Traditional NetBSD |
| 871 | * Scope: Device |
| 872 | * Responsibility: Superuser access |
| 873 | */ |
| 874 | int |
| 875 | secmodel_suser_device_cb(kauth_cred_t cred, kauth_action_t action, |
| 876 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 877 | { |
| 878 | bool isroot; |
| 879 | int result; |
| 880 | |
| 881 | isroot = suser_isroot(cred); |
| 882 | result = KAUTH_RESULT_DEFER; |
| 883 | |
| 884 | switch (action) { |
| 885 | case KAUTH_DEVICE_BLUETOOTH_SETPRIV: |
| 886 | case KAUTH_DEVICE_BLUETOOTH_SEND: |
| 887 | case KAUTH_DEVICE_BLUETOOTH_RECV: |
| 888 | case KAUTH_DEVICE_TTY_OPEN: |
| 889 | case KAUTH_DEVICE_TTY_PRIVSET: |
| 890 | case KAUTH_DEVICE_TTY_STI: |
| 891 | case KAUTH_DEVICE_TTY_VIRTUAL: |
| 892 | case KAUTH_DEVICE_RND_ADDDATA: |
| 893 | case KAUTH_DEVICE_RND_ADDDATA_ESTIMATE: |
| 894 | case KAUTH_DEVICE_RND_GETPRIV: |
| 895 | case KAUTH_DEVICE_RND_SETPRIV: |
| 896 | case KAUTH_DEVICE_WSCONS_KEYBOARD_BELL: |
| 897 | case KAUTH_DEVICE_WSCONS_KEYBOARD_KEYREPEAT: |
| 898 | if (isroot) |
| 899 | result = KAUTH_RESULT_ALLOW; |
| 900 | break; |
| 901 | |
| 902 | case KAUTH_DEVICE_BLUETOOTH_BCSP: |
| 903 | case KAUTH_DEVICE_BLUETOOTH_BTUART: { |
| 904 | enum kauth_device_req req; |
| 905 | |
| 906 | req = (enum kauth_device_req)arg0; |
| 907 | switch (req) { |
| 908 | case KAUTH_REQ_DEVICE_BLUETOOTH_BCSP_ADD: |
| 909 | case KAUTH_REQ_DEVICE_BLUETOOTH_BTUART_ADD: |
| 910 | if (isroot) |
| 911 | result = KAUTH_RESULT_ALLOW; |
| 912 | break; |
| 913 | |
| 914 | default: |
| 915 | break; |
| 916 | } |
| 917 | |
| 918 | break; |
| 919 | } |
| 920 | |
| 921 | case KAUTH_DEVICE_GPIO_PINSET: |
| 922 | /* |
| 923 | * root can access gpio pins, secmodel_securlevel can veto |
| 924 | * this decision. |
| 925 | */ |
| 926 | if (isroot) |
| 927 | result = KAUTH_RESULT_ALLOW; |
| 928 | break; |
| 929 | |
| 930 | default: |
| 931 | break; |
| 932 | } |
| 933 | |
| 934 | return (result); |
| 935 | } |
| 936 | |
| 937 | int |
| 938 | secmodel_suser_vnode_cb(kauth_cred_t cred, kauth_action_t action, |
| 939 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 940 | { |
| 941 | bool isroot; |
| 942 | int result; |
| 943 | |
| 944 | isroot = suser_isroot(cred); |
| 945 | result = KAUTH_RESULT_DEFER; |
| 946 | |
| 947 | if (isroot) { |
| 948 | /* Superuser can execute only if the file's executable. */ |
| 949 | if ((action & KAUTH_VNODE_EXECUTE) == 0 || |
| 950 | (action & KAUTH_VNODE_IS_EXEC)) |
| 951 | result = KAUTH_RESULT_ALLOW; |
| 952 | } |
| 953 | |
| 954 | return (result); |
| 955 | } |
| 956 | |
| 957 | |