mDNSMacOSX/mDNSResponder.sb

   1 ; -*- Mode: Scheme; tab-width: 4 -*-
   2 ;
   3 ; Copyright (c) 2012-2015 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 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 ;############################################################################
  29
  30
  31 ; WARNING: The sandbox rule capabilities and syntax used in this file are currently an
  32 ; Apple SPI (System Private Interface) and are subject to change at any time without notice.
  33
  34 (version 1)
  35 ; When mDNSResponder is denied access, we want to avoid symoblification of mDNSResponder
  36 ; to get the stack trace as that can get into deadlock. no-callout will prevent
  37 ; symbolification.
  38 (deny default (with no-callout))
  39
  40 (import "system.sb")
  41
  42 ; Baseline
  43 (allow file-read-metadata ipc-posix-shm)
  44
  45 ; Mach communications
  46 ; These are needed for things like getpwnam, hostname changes, & keychain
  47 (allow mach-lookup
  48        (global-name "com.apple.analyticsd")
  49        (global-name "com.apple.awdd")
  50        (global-name "com.apple.bsd.dirhelper")
  51        (global-name "com.apple.CoreServices.coreservicesd")
  52        (global-name "com.apple.coreservices.quarantine-resolver")
  53        (global-name "com.apple.distributed_notifications.2")
  54        (global-name "com.apple.distributed_notifications@1v3")
  55        (global-name "com.apple.lsd.mapdb")
  56        (global-name "com.apple.ocspd")
  57        (global-name "com.apple.PowerManagement.control")
  58        (global-name "com.apple.mDNSResponderHelper")
  59        (global-name "com.apple.mDNSResponder_Helper")
  60        (global-name "com.apple.SecurityServer")
  61        (global-name "com.apple.SystemConfiguration.configd")
  62        (global-name "com.apple.SystemConfiguration.SCNetworkReachability")
  63        (global-name "com.apple.SystemConfiguration.DNSConfiguration")
  64        (global-name "com.apple.SystemConfiguration.NetworkInformation")
  65        (global-name "com.apple.system.notification_center")
  66        (global-name "com.apple.system.logger")
  67        (global-name "com.apple.usymptomsd")
  68        (global-name "com.apple.webcontentfilter.dns")
  69        (global-name "com.apple.server.bluetooth")
  70        (global-name "com.apple.server.bluetooth.le.att.xpc")
  71        (global-name "com.apple.awacs")
  72        (global-name "com.apple.networkd")
  73        (global-name "com.apple.securityd")
  74        (global-name "com.apple.wifi.manager")
  75        ; "com.apple.blued" is the name used in pre Lobo builds,
  76        ; leave it in place while still running roots on pre Lobo targets
  77        (global-name "com.apple.blued")
  78        (global-name "com.apple.bluetoothd")
  79        (global-name "com.apple.mobilegestalt.xpc")
  80        (global-name "com.apple.ReportCrash.SimulateCrash")
  81        (global-name "com.apple.snhelper"))
  82
  83 (allow mach-register
  84        (global-name "com.apple.d2d.ipc"))
  85
  86 ; Networking, including Unix Domain Sockets
  87 (allow network*)
  88
  89 ; Raw sockets
  90 (if (defined? 'system-socket)
  91     (allow system-socket))
  92
  93 ; Hardware model information
  94 (allow sysctl-read)
  95
  96 ; Syslog early in the boot process
  97 (allow file-read-data file-write-data (literal "/dev/console"))
  98
  99 (allow file-read-data
 100        ; /etc/hosts support
 101        (literal "/private/etc/hosts")
 102        (literal "/private/etc"))
 103
 104 ; Our socket
 105 (allow file-read* file-write* (literal "/private/var/run/mDNSResponder"))
 106
 107 ; BPF control for sleep proxy server
 108 (allow file-ioctl (prefix "/dev/bpf"))
 109
 110 ; Used by CoreCrypto AES routines.
 111 (allow file-read* file-write-data file-ioctl
 112            (literal "/dev/aes_0"))
 113
 114 ; System version, settings, and other miscellaneous necessary file system accesses
 115 (allow file-read-data
 116        ; Needed for CFCopyVersionDictionary()
 117        (literal "/usr/sbin")
 118        (literal "/usr/sbin/mDNSResponder")
 119
 120        (literal "/Library/Preferences/com.apple.mDNSResponder.plist")
 121        (literal "/Library/Preferences/SystemConfiguration/preferences.plist")
 122        (literal "/Library/Preferences/SystemConfiguration/com.apple.nat.plist")
 123        (regex #"^/Library/Preferences/(ByHost/)?\.GlobalPreferences\.")
 124        (literal "/Library/Preferences/com.apple.crypto.plist")
 125        (literal "/Library/Security/Trust Settings/Admin.plist")
 126        (regex #"^/Library/Preferences/com\.apple\.security\.")
 127        (literal "/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist")
 128        (literal "/private/var/preferences/SystemConfiguration/preferences.plist")
 129        (subpath "/System/Library/Preferences/Logging")
 130        (subpath "/AppleInternal/Library/Preferences/Logging")
 131        (subpath "/private/var/preferences/Logging/Subsystems")
 132        (subpath "/private/var/db/timezone")
 133        (subpath "/Library/Preferences/Logging"))
 134
 135
 136 ; For MAC Address
 137 (allow system-info (info-type "net.link.addr"))
 138
 139 ; We just need access to System.keychain. But we don't want errors logged if other keychains are
 140 ; accessed under /Library/Keychains. Other keychains may be accessed as part of setting up an SSL
 141 ; connection. Instead of adding access to it here (to things which we don't need), we disable any
 142 ; logging that might happen during the access
 143 (deny file-read-data (regex #"^/Library/Keychains/") (with no-log))
 144 (allow file-read-data (literal "/Library/Keychains/System.keychain"))
 145
 146
 147 ; Our Module Directory Services cache
 148 (allow file-read-data
 149        (subpath "/private/var/tmp/mds")
 150        (subpath "/private/var/db/mds"))
 151
 152 (allow file-read* file-write*
 153        (regex #"^/private/var/tmp/mds/[0-9]+(/|$)")
 154        (regex #"^/private/var/db/mds/[0-9]+(/|$)")
 155        (regex #"^/private/var/folders/[^/]+/[^/]+/C/mds(/|$)")
 156
 157        ; Required on 10.5 and 10.6
 158        (regex #"^/private/var/folders/[^/]+/[^/]+/-Caches-/mds(/|$)"))
 159
 160 ; CRL Cache for SSL/TLS connections
 161 (allow file-read-data (literal "/private/var/db/crls/crlcache.db"))
 162
 163 ; For mDNS sleep proxy offload and IOPMConnectionCreate
 164 (if (defined? 'iokit-open)
 165    (begin
 166      (allow iokit-open
 167         (iokit-user-client-class "NVEthernetUserClientMDNS")
 168         (iokit-user-client-class "mDNSOffloadUserClient")
 169         (iokit-user-client-class "wlDNSOffloadUserClient")
 170         (iokit-user-client-class "RootDomainUserClient")
 171         (iokit-user-client-class "AppleMobileFileIntegrityUserClient"))))
 172
 173 ; Internal builds only
 174 (with-filter (system-attribute apple-internal)
 175     (allow sysctl-read sysctl-write
 176         (sysctl-name "vm.footprint_suspend"))) ; dyld performance reporting
 177