mDNSMacOSX/mDNSResponder.sb

   1 ; -*- Mode: Scheme; tab-width: 4 -*-
   2 ;
   3 ; Copyright (c) 2007 Apple Inc. All rights reserved.
   4 ;
   5 ; Redistribution and use in source and binary forms, with or without
   6 ; modification, are permitted provided that the following conditions are met:
   7 ;
   8 ; 1.  Redistributions of source code must retain the above copyright notice,
   9 ;     this list of conditions and the following disclaimer.
  10 ; 2.  Redistributions in binary form must reproduce the above copyright notice,
  11 ;     this list of conditions and the following disclaimer in the documentation
  12 ;     and/or other materials provided with the distribution.
  13 ; 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of its
  14 ;     contributors may be used to endorse or promote products derived from this
  15 ;     software without specific prior written permission.
  16 ;
  17 ; THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18 ; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 ; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 ; DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21 ; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22 ; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23 ; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24 ; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25 ; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  26 ; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 ;
  28 ; $Log: mDNSResponder.sb,v $
  29 ; Revision 1.38  2009/04/16 16:03:08  mcguire
  30 ; <rdar://problem/6792024> abort() causes high CPU usage instead of crash & restart
  31 ;
  32 ; Revision 1.37  2009/04/02 22:21:17  mcguire
  33 ; <rdar://problem/6577409> Adopt IOPM APIs
  34 ;
  35 ; Revision 1.36  2009/03/02 01:32:20  mcguire
  36 ; <rdar://problem/6623264> Seatbelt: Add rule to allow raw sockets
  37 ;
  38 ; Revision 1.35  2009/02/07 02:51:10  cheshire
  39 ; <rdar://problem/6084043> Sleep Proxy: Need to adopt IOPMConnection
  40 ; Allow mDNSResponder to access IOPMConnection API
  41 ;
  42 ; Revision 1.34  2008/11/11 00:55:08  mcguire
  43 ; <rdar://problem/6357957> sandbox: need to allow Mach port com.apple.system.DirectoryService.membership_v1
  44 ;
  45 ; Revision 1.33  2008/10/24 02:03:30  cheshire
  46 ; So we can watch for Internet Sharing changes, allow read access to
  47 ; /Library/Preferences/SystemConfiguration/com.apple.nat.plist
  48 ;
  49 ; Revision 1.32  2008/10/07 23:06:58  mcguire
  50 ; <rdar://problem/6276444> Seatbelt: Policy denied Mach service lookup: com.apple.system.logger
  51 ;
  52 ; Revision 1.31  2008/09/24 23:57:27  mcguire
  53 ; <rdar://problem/6227808> need read access to /private/var/db/crls/crlcache.db
  54 ;
  55 ; Revision 1.30  2008/09/11 22:01:51  mcguire
  56 ; re-add accidentally removed log comment
  57 ;
  58 ; Revision 1.29  2008/09/11 20:46:08  mcguire
  59 ; <rdar://problem/6208848> can't write to -Caches-
  60 ;
  61 ; Revision 1.28  2008/09/11 20:04:14  mcguire
  62 ; <rdar://problem/6211355> Instances of \. in regex exprs don't do what is intended
  63 ;
  64 ; Revision 1.27  2008/07/24 21:18:14  cheshire
  65 ; <rdar://problem/3988320> Should use randomized source ports and transaction IDs to avoid DNS cache poisoning
  66 ; Need to allow access to /dev/urandom
  67 ;
  68 ; Revision 1.26  2008/06/03 01:21:12  mcguire
  69 ; <rdar://problem/5902470> add /var/db/mds to sb profile
  70 ;
  71 ; Revision 1.25  2008/03/17 18:04:41  mcguire
  72 ; <rdar://problem/5800476> SC now reads preference file
  73 ;
  74 ; Revision 1.24  2007/09/20 22:33:17  cheshire
  75 ; Tidied up inconsistent and error-prone naming -- used to be mDNSResponderHelper in
  76 ; some places and mDNSResponder.helper in others; now mDNSResponderHelper everywhere
  77 ;
  78 ; Revision 1.23  2007/09/04 22:26:18  mcguire
  79 ; <rdar://problem/5442826> Seatbelt: mDNSResponder needs to be allowed to access "/Library/Security/Trust Settings/" etc.
  80 ;
  81 ; Revision 1.22  2007/08/24 22:01:56  mcguire
  82 ; <rdar://problem/5141606> BTMM: Task: Change mDNSResponder Seatbelt settings to "deny default" instead of "signal FPE" just prior to GM candidate
  83 ;
  84 ; Revision 1.21  2007/08/18 01:02:03  mcguire
  85 ; <rdar://problem/5415593> No Bonjour services are getting registered at boot
  86 ;
  87 ; Revision 1.20  2007/08/08 22:34:59  mcguire
  88 ; <rdar://problem/5197869> Security: Run mDNSResponder as user id mdnsresponder instead of root
  89 ;
  90 ; Revision 1.19  2007/07/02 23:37:50  cheshire
  91 ; <rdar://problem/5267615> Need to list of allowed mach-lookup operations explicitly in mDNSResponder.sb
  92 ;
  93 ; Revision 1.18  2007/06/28 20:43:35  cheshire
  94 ; <rdar://problem/5298202> Seatbelt: mDNSResponder needs to be able to access /dev/autofs_nowait
  95 ;
  96 ; Revision 1.17  2007/06/28 20:34:45  cheshire
  97 ; Updated comments to reflect new seatbelt language syntax
  98 ;
  99 ; Revision 1.16  2007/05/29 23:32:46  cheshire
 100 ; Rearrange file so SPI warning isn't deleted when CVS history is trimmed from installed copy
 101 ;
 102 ; Revision 1.15  2007/05/25 22:45:17  jvidrine
 103 ; <rdar://problem/5227658> Update mDNSResponder.sb to Seatbelt Profile Language version 1
 104 ;
 105 ; Revision 1.14  2007/05/23 17:40:08  cheshire
 106 ; <rdar://problem/5221397> Seatbelt killed mDNSResponder trying to read X509Anchors and X509Certificates
 107 ;
 108 ; Revision 1.13  2007/05/23 01:47:59  cheshire
 109 ; Need to list fs_read_data permission explicitly --
 110 ; unlike fs_read/fs_write, fs_read_data does NOT automatically inherit from fs_write_data
 111 ;
 112 ; Revision 1.12  2007/05/21 23:52:27  cheshire
 113 ; <rdar://problem/5216638> Seatbelt killed mDNSResponder generating Module Directory Services cache
 114 ;
 115 ; Revision 1.11  2007/05/20 16:29:06  cheshire
 116 ; <rdar://problem/5213725> Seatbelt killed mDNSResponder trying to access /usr/share/icu/icudt36l.dat
 117 ;
 118 ; Revision 1.10  2007/05/15 00:21:39  cheshire
 119 ; <rdar://problem/5202374> Seatbelt killed mDNSResponder reading /private/var/root/Library/Preferences/com.apple.security.plist
 120 ;
 121 ; Revision 1.9  2007/05/14 22:08:26  cheshire
 122 ; <rdar://problem/5200986> Seatbelt: Need to escape literal dots in filename patterns
 123 ;
 124 ; Revision 1.8  2007/05/14 19:39:31  cheshire
 125 ; <rdar://problem/5198345> Seatbelt killed mDNSResponder in CFTimeZoneCopyDefault
 126 ; <rdar://problem/5199456> Seatbelt killed mDNSResponder in SecKeychainOpen
 127 ;
 128 ; Revision 1.7  2007/05/12 01:57:56  cheshire
 129 ; <rdar://problem/5197938> Seatbelt: mDNSResponder needs to be able to access preferences.plist-lock
 130 ;
 131 ; Revision 1.6  2007/05/10 21:12:14  cheshire
 132 ; <rdar://problem/5149833> Start using "debug deny" mode in Seatbelt
 133 ;
 134 ; Revision 1.5  2007/05/10 19:41:25  cheshire
 135 ; <rdar://problem/5182549> Have to use "deny mach_lookup_default" because "signal" doesn't work
 136 ;
 137 ; Revision 1.4  2007/04/27 20:46:31  cheshire
 138 ; Additional requirements: allow mDNSResponder to read /dev/random and /System/Library/Keychains/System.*
 139 ;
 140 ; Revision 1.3  2007/04/20 19:42:14  cheshire
 141 ; Condense rules a bit to bring file under Seatbelt's 4K limit
 142 ;
 143 ; Revision 1.2  2007/04/19 01:47:49  cheshire
 144 ; Refinements to sandbox profile, e.g. allow writing to /dev/console early in the boot process
 145 ;
 146 ; Revision 1.1  2007/04/18 00:50:47  cheshire
 147 ; <rdar://problem/5141540> Sandbox mDNSResponder
 148 ;
 149 ;############################################################################
 150
 151 ; WARNING! SEATBELT CURRENTLY CAN'T HANDLE PROFILES LARGER THAN 16K
 152 ; MAKE SURE THE SIZE OF THIS FILE FROM "version" TO THE END DOESN'T EXCEED 16K
 153
 154 (version 1)
 155
 156 ; WARNING: The sandbox rule capabilities and syntax used in this file are currently an
 157 ; Apple SPI (System Private Interface) and are subject to change at any time without notice.
 158 ; Apple may in future announce an official public supported sandbox API, but until then Developers
 159 ; are cautioned not to build products that use or depend on the sandbox facilities illustrated here.
 160
 161 ; Use "debug all" to log all operations examined by seatbelt, whether allowed or not.
 162 ; Use "debug deny" to log only operations that are denied by seatbelt
 163 ; to discover what specific attempted operation is causing an exception.
 164
 165 ;(debug all)
 166 (debug deny)
 167
 168 ; To help debugging, "with send-signal SIGFPE" will trigger a fake floating-point exception,
 169 ; which will crash the process and show the call stack leading to the offending operation.
 170 ; For the shipping version "deny" is probably better because it vetoes the operation
 171 ; without killing the process.
 172
 173 (deny default)
 174 ;(deny default (with send-signal SIGFPE))
 175
 176 ; Special exception: "send-signal" command does not apply to the mach-* operations,
 177 ; so for those we have to use a plain unadorned "deny" instead
 178 ; (which means we may not get any notification of unintentional mach-* denials)
 179 (deny mach-lookup)
 180 (deny mach-priv-host-port)
 181
 182 ; Mach communications
 183 ; These are needed for things like getpwnam, hostname changes, & keychain
 184 (allow mach-lookup (global-name
 185                                         "com.apple.bsd.dirhelper"
 186                                         "com.apple.distributed_notifications.2"
 187                                         "com.apple.ocspd"
 188                                         "com.apple.PowerManagement.control"
 189                                         "com.apple.mDNSResponderHelper"
 190                                         "com.apple.SecurityServer"
 191                                         "com.apple.SystemConfiguration.configd"
 192                                         "com.apple.system.DirectoryService.libinfo_v1"
 193                                         "com.apple.system.DirectoryService.membership_v1"
 194                                         "com.apple.system.notification_center"
 195                                         "com.apple.system.logger"))
 196
 197 ; Rules to allow the operations mDNSResponder needs start here
 198
 199 (allow signal (target self))
 200 (allow network*)                        ; Allow networking, including Unix Domain Sockets
 201 (if (defined? 'system-socket)
 202     (allow system-socket))  ; To create raw sockets
 203 (allow sysctl-read)                     ; To get hardware model information
 204 (allow file-read-metadata)      ; Needed for dyld to work
 205 (allow ipc-posix-shm)           ; Needed for POSIX shared memory
 206
 207 (allow file-read-data                 (regex #"^/dev/random$"))
 208 (allow file-read-data file-write-data (regex #"^/dev/console$"))                ; Needed for syslog early in the boot process
 209 (allow file-read-data                 (regex #"^/dev/autofs_nowait$"))  ; Used by CF to circumvent automount triggers
 210
 211 ; Allow us to read and write our socket
 212 (allow file-read*     file-write*     (regex #"^/private/var/run/mDNSResponder$"))
 213
 214 ; Allow us to read system version, settings, and other miscellaneous necessary file system accesses
 215 (allow file-read-data                 (regex #"^/dev/urandom$"))
 216 (allow file-read-data                 (regex #"^/usr/sbin(/mDNSResponder)?$"))          ; Needed for CFCopyVersionDictionary()
 217 (allow file-read-data                 (regex #"^/usr/share/icu/.*$"))
 218 (allow file-read-data                 (regex #"^/usr/share/zoneinfo/.*$"))
 219 (allow file-read-data                 (regex #"^/Library/Preferences/SystemConfiguration/preferences\.plist$"))
 220 (allow file-read-data                 (regex #"^/Library/Preferences/SystemConfiguration/com\.apple\.nat\.plist$"))
 221 (allow file-read-data                 (regex #"^/Library/Preferences/(ByHost/)?\.GlobalPreferences.*\.plist$"))
 222 (allow file-read-data                 (regex #"^/Library/Preferences/com\.apple\.security.*\.plist$"))
 223 (allow file-read-data                 (regex #"^/Library/Preferences/com\.apple\.crypto\.plist$"))
 224 (allow file-read-data                 (regex #"^/Library/Security/Trust Settings/Admin\.plist$"))
 225 (allow file-read-data                 (regex #"^/System/Library/CoreServices/SystemVersion.*$"))
 226 (allow file-read-data                 (regex #"^/System/Library/Preferences/com\.apple\.security.*\.plist$"))
 227 (allow file-read-data                 (regex #"^/System/Library/Preferences/com\.apple\.crypto\.plist$"))
 228 (allow file-read-data                 (regex #"^/System/Library/SystemConfiguration/PowerManagement\.bundle(/|$)"))
 229 (allow file-read-data                 (regex #"^/Library/Preferences/SystemConfiguration/com\.apple\.PowerManagement\.plist$"))
 230
 231 ; Allow access to System Keychain
 232 (allow file-read-data                 (regex #"^/System/Library/Security$"))
 233 (allow file-read-data                 (regex #"^/System/Library/Keychains/.*$"))
 234 (allow file-read-data                 (regex #"^/Library/Keychains/System\.keychain$"))
 235 ; Our Module Directory Services cache
 236 (allow file-read-data                 (regex #"^/private/var/tmp/mds/"))
 237 (allow file-read* file-write*         (regex #"^/private/var/tmp/mds/[0-9]+(/|$)"))
 238 (allow file-read-data                 (regex #"^/private/var/db/mds/"))
 239 (allow file-read* file-write*         (regex #"^/private/var/db/mds/[0-9]+(/|$)"))
 240 (allow file-read* file-write*         (regex #"^/private/var/folders/[^/]+/[^/]+/-Caches-/mds(/|$)"))
 241 ; CRL Cache for SSL/TLS connections
 242 (allow file-read-data                 (regex #"^/private/var/db/crls/crlcache\.db$"))