CVE-2019-8549

Multiple input validation issues existed in MIG generated code. These issues were addressed with improved validation. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. A malicious application may be able to execute arbitrary code with system privileges...

Input validation

Multiple input validation issues existed in MIG generated code. These issues were addressed with improved validation. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. A malicious application may be able to execute arbitrary code with system privileges...

CVE-2019-8549

Multiple input validation issues existed in MIG generated code. These issues were addressed with improved validation. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. A malicious application may be able to execute arbitrary code with system privileges...

PT-2019-19085

Name of the Vulnerable Software and Affected Versions iOS versions prior to 12.2 macOS Mojave versions prior to 10.14.4 tvOS versions prior to 12.2 watchOS versions prior to 5.2 Description The issue involves multiple input validation problems in MIG generated code, which have been resolved with...

CVE-2019-8549: Improper Input Validation

Multiple input validation issues existed in MIG generated code. These issues were addressed with improved validation. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2. A malicious application may be able to execute arbitrary code with system privileges...

voucher_swap: Exploiting MIG reference counting in iOS 12

Posted by Brandon Azad, Project Zero In this post I'll describe how I discovered and exploited CVE-2019-6225, a MIG reference counting vulnerability in XNU's taskswapmachvoucher function. We'll see how to exploit this bug on iOS 12.1.2 to build a fake kernel task port, giving us the ability to re...

iOS / macOS - task_swap_mach_voucher() Use-After-Free Exploit

/ voucherswap-poc.c Brandon Azad / if 0 iOS/macOS: taskswapmachvoucher does not respect MIG semantics leading to use-after-free The dangers of not obeying MIG semantics have been well documented: see issues 926 CVE-2016-7612, 954 CVE-2016-7633, 1417 CVE-2017-13861, asyncwake, 1520 CVE-2018-4139,...

iOS/macOS - 'task_swap_mach_voucher()' Use-After-Free

/ voucherswap-poc.c Brandon Azad / if 0 iOS/macOS: taskswapmachvoucher does not respect MIG semantics leading to use-after-free The dangers of not obeying MIG semantics have been well documented: see issues 926 CVE-2016-7612, 954 CVE-2016-7633, 1417 CVE-2017-13861, asyncwake, 1520 CVE-2018-4139,...

iOSmacOS - task_swap_mach_voucher() Use-After-Free

iOSmacOS - taskswapmachvoucher Use-After-Free / voucherswap-poc.c Brandon Azad / if 0 iOS/macOS: taskswapmachvoucher does not respect MIG semantics leading to use-after-free The dangers of not obeying MIG semantics have been well documented: see issues 926 CVE-2016-7612, 954 CVE-2016-7633, 1417...

Apple iOS/macOS - Sandbox Escape due to Trusted Length Field in Shared Memory used by HID Event Subsystem

iohideventsystem is a MIG service which provides proxy access to various HID devices for untrusted clients. On iOS it's hosted by backboardd and on MacOS by hidd. The actual implementation is in IOKit.framework. I, and also pangu jailbreak team, had previously found a few bugs in the kernel...

Apple iOSmacOS - Sandbox Escape due to Trusted Length Field in Shared Memory used by HID Event Subsystem

Apple iOSmacOS - Sandbox Escape due to Trusted Length Field in Shared Memory used by HID Event Subsystem iohideventsystem is a MIG service which provides proxy access to various HID devices for untrusted clients. On iOS it's hosted by backboardd and on MacOS by hidd. The actual implementation is ...

macOS 10.13.2 - Double mach_port_deallocate in kextd due to Failure to Comply with MIG Ownership Rul

Exploit for macOS platform in category dos / poc Here's a kextd method exposed via MIG com.apple.KernelExtensionServer kernreturnt kextmanagerunlockkextload machportt server, machportt client kernreturnt migresult = KERNFAILURE; if gClientUID != 0 OSKextLog/ kext / NULL, kOSKextLogErrorLevel |...

macOS / iOS - ReportCrash mach port Replacement due to Failure to Respect MIG Ownership Rules

Exploit for multiple platform in category dos / poc / ReportCrash is the daemon responsible for making crash dumps of crashing userspace processes. Most processes can talk to ReportCrash via their exception ports either task or host level. You would normally never send a message yourself to...

Apple macOS 10.13.2 - Double mach_port_deallocate in kextd due to Failure to Comply with MIG Ownership Rules

Apple macOS 10.13.2 - Double machportdeallocate in kextd due to Failure to Comply with MIG Ownership Rules Here's a kextd method exposed via MIG com.apple.KernelExtensionServer kernreturnt kextmanagerunlockkextload machportt server, machportt client kernreturnt migresult = KERNFAILURE; if...

Apple macOS/iOS - ReportCrash mach port Replacement due to Failure to Respect MIG Ownership Rules

/ ReportCrash is the daemon responsible for making crash dumps of crashing userspace processes. Most processes can talk to ReportCrash via their exception ports either task or host level. You would normally never send a message yourself to ReportCrash but the kernel would do it on your behalf whe...

Apple macOS 10.13.2 - Double mach_port_deallocate in kextd due to Failure to Comply with MIG Ownership Rules

Here's a kextd method exposed via MIG com.apple.KernelExtensionServer kernreturnt kextmanagerunlockkextload machportt server, machportt client kernreturnt migresult = KERNFAILURE; if gClientUID != 0 OSKextLog/ kext / NULL, kOSKextLogErrorLevel | kOSKextLogIPCFlag, "Non-root kextutil doesn't need ...

Apple macOSiOS - ReportCrash mach port Replacement due to Failure to Respect MIG Ownership Rules

Apple macOSiOS - ReportCrash mach port Replacement due to Failure to Respect MIG Ownership Rules / ReportCrash is the daemon responsible for making crash dumps of crashing userspace processes. Most processes can talk to ReportCrash via their exception ports either task or host level. You would...

iOS/MacOS kernel double free due to IOSurfaceRootUserClient not respecting MIG ownership rules(CVE-2017-13861)

I have previously detailed the lifetime management paradigms in MIG in the writeups for: CVE-2016-7612 https://bugs.chromium.org/p/project-zero/issues/detail?id=926 and CVE-2016-7633 https://bugs.chromium.org/p/project-zero/issues/detail?id=954 If a MIG method returns KERNSUCCESS it means that th...

Apple macOS/iOS - Kernel Double Free due to IOSurfaceRootUserClient not Respecting MIG Ownership Rules

I have previously detailed the lifetime management paradigms in MIG in the writeups for: CVE-2016-7612 https://bugs.chromium.org/p/project-zero/issues/detail?id=926 and CVE-2016-7633 https://bugs.chromium.org/p/project-zero/issues/detail?id=954 If a MIG method returns KERNSUCCESS it means that th...

Apple macOSiOS - Kernel Double Free due to IOSurfaceRootUserClient not Respecting MIG Ownership Rules

Apple macOSiOS - Kernel Double Free due to IOSurfaceRootUserClient not Respecting MIG Ownership Rules I have previously detailed the lifetime management paradigms in MIG in the writeups for: CVE-2016-7612 https://bugs.chromium.org/p/project-zero/issues/detail?id=926 and CVE-2016-7633...