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 - 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...

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...