CVE-2023-32413

macOS LPE CVE-2023-32413 / ZDI-23-845 / Pwn2Own Vancouver 2023 exploit This is the exploit code that has been played at Pwn2Own Vancouver 2023 https://youtu.be/c0cS4R0ja-I?t=180. This code exploits CVE-2023-32413 to gain root rights on any vulnerable macOS. The vulnerability is a logic TOCTOU tha...

MacDirtyCow

MacDirtyCow Example of CVE-2022-46689 aka MacDirtyCow. What? MacDirtyCow is a privilege escalation vulnerability in macOS, similar to the Dirty COW vulnerability in Linux. The vulnerability resides in the copy-on-write COW mechanism used by macOS's XNU kernel. The vulnerability allows an attacker...

MacDirtyCowDemo

Get root on macOS 13.0.1 with CVE-2022-46689 macOS equivalent of the Dirty Cow bug, using the testcase extracted from Apple's XNU source. https://worthdoingbadly.com/macdirtycow/ Usage On a macOS 13.0.1 / 12.6.1 or below machine, run: root@kitploit: clang -o switcharoo vmunalignedcopyswitchrace.c...

macOS XNU - Missing Locking in checkdirs_callback() Enables Race with fchdir_common() Exploit

On macOS, when a new mount point is created, the kernel uses checkdirs to, as a comment above the function explains: "Scan all active processes to see if any of them have a current or root directory onto which the new filesystem has just been mounted. If so, replace them with the new mount point....

macOS XNU - Missing Locking in checkdirs_callback() Enables Race with fchdir_common()

macOS XNU - Missing Locking in checkdirscallback Enables Race with fchdircommon On macOS, when a new mount point is created, the kernel uses checkdirs to, as a comment above the function explains: "Scan all active processes to see if any of them have a current or root directory onto which the new...

macOS XNU - Copy-on-Write Behavior Bypass via Mount of User-Owned Filesystem Image

macOS XNU - Copy-on-Write Behavior Bypass via Mount of User-Owned Filesystem Image XNU has various interfaces that permit creating copy-on-write copies of data between processes, including out-of-line message descriptors in mach messages. It is important that the copied memory is protected agains...

macOS XNU - Copy-on-Write Behavior Bypass via Mount of User-Owned Filesystem Image

XNU has various interfaces that permit creating copy-on-write copies of data between processes, including out-of-line message descriptors in mach messages. It is important that the copied memory is protected against later modifications by the source process; otherwise, the source process might be...

macOS XNU - Copy-on-Write Behaviour Bypass via Partial-Page Truncation of File

/ XNU has various interfaces that permit creating copy-on-write copies of data between processes, including out-of-line message descriptors in mach messages. It is important that the copied memory is protected against later modifications by the source process; otherwise, the source process might ...

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 proclistuptrs has the following comment in it's userspace header: / Enumerate potential userspace pointers embedded in kernel data structures. Currently inspects kqueues only. NOTE: returned "pointers"...