Apple iOS 4 Security Evaluation

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Data EncryptionWhat you need to know about Data Encryption in<strong>iOS</strong> to make informed deployment andconfiguration decisionsFor more internals and implementation details,refer to excellent “iPhone Data Protection inDepth” 1 from HITB Amsterdam 20111 http://esec-lab.sogeti.com/dotclear/public/publications/11-hitbamsterdam-iphonedataprotection.pdf
Encryption LayersEntire filesystem is encrypted using block-based encryption with File SystemKeyFSK is stored on the flash, encrypted using key derived from UID KeyEach file has a unique encryption key stored in an extended attribute,protected by Class KeyClass Keys are stored in the System KeyBagSome Class Keys are protected by a key derived from the user’s passcode(Passcode Key)Certain Class Keys are also protected by the device-specific UID Key that isembedded in hardware and inaccessible to code running on CPU
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Apple iOS 4 Security EvaluationDino
Page 3 and 4:
AcknowledgementsiPhone jailbreak de
Page 5 and 6:
OverviewIntroductionASLRCode Signin
Page 7 and 8:
Security ConcernsSensitive data com
Page 9 and 10:
Persistence Attack GraphPrivileged
Page 11 and 12: Security ConcernsHow hard is it to
Page 13 and 14: ASLR with PIEExecutable Heap Stack
Page 15 and 16: Partial vs. Full ASLRPIEMainExecuta
Page 17 and 18: PIE in Real-World Apps?
Page 19 and 20: Bottom LineAll built-in apps in iOS
Page 21 and 22: Security ConcernsCan this applicati
Page 23 and 24: Mandatory Code SigningCode Signing
Page 25 and 26: Provisioning ProfilesThe Provisioni
Page 28 and 29: Distribution ModelsOn-Device Develo
Page 30 and 31: Code Signing InternalsAppleMobileFi
Page 32 and 33: MAC Hook API Description AMFI Usage
Page 34 and 35: Ad-Hoc Code SignatureExecutable=/De
Page 36 and 37: Code Signing Verificationvnode_chec
Page 38 and 39: Bypassing Code SigningIncomplete Co
Page 40 and 41: csopsint csops(pid_t pid, uint32_t
Page 42: CS Status FlagsFlag Value Descripti
Page 45 and 46: # ldid -e /Applications/MobileSafar
Page 47 and 48: Dynamic Code SigningThe dynamic-cod
Page 49 and 50: Sandboxing
Page 51 and 52: Sandboxing in iOSBased on same core
Page 53 and 54: Built-in Sandbox ProfilesBackground
Page 55 and 56: App Home DirectorySubdirectory.app/
Page 57 and 58: Mach Bootstrap ServersAll Mach task
Page 59 and 60: Bottom LineRemote exploits are most
Page 61: Security ConcernsWhat sensitive dat
Page 65 and 66: Data ProtectionCoverageIn iOS 4, DP
Page 67 and 68: Passcode KeyPasscode Key is derived
Page 69 and 70: Bottom Line6-character alphanumeric
Page 71 and 72: FindingsThird-party applications wi
Page 73 and 74: iOS vs. Android/BlackBerryHow does
Page 75 and 76: On JailbreakingModern jailbreaks re
Page 77 and 78: Hardware AdviceiPhone 3G and earlie
Page 79 and 80: One more thing...
Page 81: previewhobbyOne more thing...
Page 86 and 87: $99
Page 88 and 89: iOS Fuzz Farm• 4 x Apple TVs, swi
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Apple iOS 4 Security Evaluation

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