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==Kernel Manipulation== ...2NORAccess) this page describes several attempts to manipulate an existing kernel extension or insert a new one from 1.0.2.

The kernelcache is basically the [[kernel]] itself as well as all of its extensions (AppleImage3NORAccess, IOAESAccel ...rypted kernelcache - including system call and Mach trap addresses (in the kernel) as well as a list of all the KEXTs contained therein and their load addres

The application's Info.plist is modified so that the jailbroken iPhone kernel does not check the application's signature, which is invalidated by the mod ....20090213.html] suggests reading the executable file, and checking for the Mach-O directives for an encrypted section, as FairPlay introduces an encrypted

...k the syscall number to distinguish between POSIX calls (non negative) and Mach traps (negative). Most of these are the same as you would find in the XNU open source kernel, with ARM idiosyncrasies aside (and #372, ledger)

mach-o and ARM: never done before outside apple; we needed to write it ourselves recovery mode sending a ramdisk and kernel can boot the device no matter whats on nand

...he loader is split over several functions, with the main body (LZSSDEC and Mach-O) provided by the function at ROM:5FF120C8. Complete disassembly to follow ...5EAC 0C4 LDR.W R0, =aLoadingKernelCacheAtX___ ; "Loading kernel cache at %#x..."

...by its full name com.apple.driver.AppleMobileFileIntegrity, is an [[iOS]] kernel extension which serves as the corner stone of iOS's code entitlements model ...alization function). The latter function registers a MAC policy (using the kernel exported mac_policy_register), which is used to hook various system operati

...allows untethered userland code execution. The idea is to plant a crafted Mach-O binary on the filesystem and have it loaded early during the boot process ...(gadgets). The endgame is to have the userland code trigger and exploit a kernel vulnerability to achieve the jailbroken state. This is fixed as of iOS 4.3.

...ch is conceptually<ref name="caveat"/> a micro-kernel within the bigger of kernel of XNU, does not support the UNIX/BSD concept of a process. Instead, it han Mach's task APIs are far more powerful than the common POSIX syscalls which deal

...ge along with the different builds, please add the symbols under the right kernel version (i.e. release + device). If not 100% sure about a symbol, indicate Started with [[N81AP|iPod touch (4th generation)]], because this is the main kernel the author has largely (>80%) symbolicated. Please add your own. Even if yo

Mach kernel version: Darwin Kernel Version 15.5.0: Mon Apr 18 16:44:05 PDT 2016; root:xnu-3248.50.21~4/RELEASE

Mach kernel version: Darwin Kernel Version 13.0.0: Sun Aug 19 00:31:06 PDT 2012; root:xnu-2107.2.33~4/RELEASE_

...goal of Kernel ASLR is to prevent an attacker from modifying or utilizing (kernel) data at known (fixed) addresses. The strategy to implement this is two-fol *Randomize the kernel image base

| rowspan="2" | Security fix: kernel payload now restores <code>sysent</code> table<br>Security fix: code fix fo === Mach-O (OS X binary) ===

* [[BPF_STX Kernel Write Exploit]] * [[IOSurface Kernel Exploit]] ({{cve|2010-2973}})

The jailbreak utilizes several of Ian Beer's exploits discovered in the kernel of iOS 10.1. ...ered jailbreak]] for [[tvOS]] 10 and demonstrating the universality of the Mach voucher bug, upon which it was based. This jailbreak was released as [[Libe

...does not contain kernels (mach files) for the [[t8020]] processor, however kernel extensions for [[t8020]] and [[t8027]] are present. This build also contain This firmware has the kernel version <code>Darwin Kernel Version 17.0.0: Fri Aug 11 19:50:52 PDT 2017; root:xnu_development-4570.2.5

* Export kernel base and other useful things for developers (see [https://github.com/sbingn *Introducing kernel patch finder v2 - rewritten from the ground up for sanic speed

- the kernelcache file does not contain a compressed mach-o kernelcache ...the risk of locking the unit up due to a hang while booting the upgrade [[kernel]].

This firmware contains Mach kernels for the following SoCs: [[S5L8960|S5L8960X]], [[T7000]], [[T7001]], This firmware has the kernel version <code>Darwin Kernel Version 15.0.0: Thu Aug 20 13:13:33 PDT 2015; root:xnu_development-3248.1.3