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Apple XNU Kernel - Memory Corruption due to Integer Overflow in __offsetof Usage in posix_spawn on 32-bit Platforms
posix_spawn is a complex syscall which takes a lot of arguments from userspace. The third argument
is a pointer to a further arguments descriptor in userspace with the following...
Apple macOS/iOS - Multiple Kernel Use-After-Frees due to Incorrect IOKit Object Lifetime Management in IOTimeSyncClockManagerUserClient
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1377
IOTimeSyncClockManagerUserClient provides the userspace interface for the...
Apple macOS - 'getrusage' Stack Leak Through struct Padding
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1405
For 64-bit processes, the getrusage() syscall handler converts a `struct rusage` to a `struct user64_rusage` using `munge_user64_rusage()`, then copies the...
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...
Apple macOS XNU Kernel - Memory Disclosure due to bug in Kernel API for Detecting Kernel Memory Disclosures
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1372
the kernel libproc API proc_list_uptrs has the following comment in it's userspace header:
/*
* Enumerate...
Apple macOS - 'necp_get_socket_attributes' so_pcb Type Confusion
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1392&desc=2
When getsockopt() [edited; original report said "setsockopt"] is called on any socket with level SOL_SOCKET and optname SO_NECP_ATTRIBUTES...