XNU Kernel - Heap Overflow Due to Bad Bounds Checking in MPTCP

XNU Kernel - Heap Overflow Due to Bad Bounds Checking in MPTCP mptcpusrconnectx is the handler for the connectx syscall for the APMULTIPATH socket family. The logic of this function fails to correctly handle source and destination sockaddrs which aren't AFINET or AFINET6: // verify salen for...

XNU Kernel - Heap Overflow Due to Bad Bounds Checking in MPTCP

mptcpusrconnectx is the handler for the connectx syscall for the APMULTIPATH socket family. The logic of this function fails to correctly handle source and destination sockaddrs which aren't AFINET or AFINET6: // verify salen for AFINET: if dst-safamily == AFINET && dst-salen !=...

Apple macOS XNU Kernel - Memory Disclosure due to bug in Kernel API for Detecting Kernel Memory Disclosures

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...

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"...

Apple MacOS 32-Bit Syscall Exit Kernel Register Leak(CVE-2017-2509)

The XNU kernel, when compiled for a x86-64 CPU, can run 32-bit x86 binaries in compatibility mode. 32-bit binaries use partly separate syscall entry and exit paths. To return to userspace, unixsyscall in bsd/dev/i386/systemcalls.c calls threadexceptionreturn in osfmk/x8664/locore.s, which in turn...

Apple macOS - 32-bit syscall exit Kernel Register Leak Exploit

Exploit for macOS platform in category dos / poc Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1149 The XNU kernel, when compiled for a x86-64 CPU, can run 32-bit x86 binaries in compatibility mode. 32-bit binaries use partly separate syscall entry and exit paths. To return to...

Apple macOS - 32-bit syscall exit Kernel Register Leak

Apple macOS - 32-bit syscall exit Kernel Register Leak Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1149 The XNU kernel, when compiled for a x86-64 CPU, can run 32-bit x86 binaries in compatibility mode. 32-bit binaries use partly separate syscall entry and exit paths. To...

Apple macOS - '32-bit syscall exit' Kernel Register Leak

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1149 The XNU kernel, when compiled for a x86-64 CPU, can run 32-bit x86 binaries in compatibility mode. 32-bit binaries use partly separate syscall entry and exit paths. To return to userspace, unixsyscall in...

XNU kernel UaF due to lack of locking in set_dp_control_port (CVE-2016-7644)

setdpcontrolport is a MIG method on the hostprivport so this bug is a root-kernel escalation. kernreturnt setdpcontrolport hostprivt hostpriv, ipcportt controlport if hostpriv == HOSTPRIVNULL return KERNINVALIDHOST; if IPVALIDdynamicpagercontrolport ipcportreleasesenddynamicpagercontrolport;...

iOS 10.1.1 / macOS 10.12 16A323 XNU Kernel - set_dp_control_port Lack of Locking Use-After-Free Vuln

Exploit for multiple platform in category dos / poc Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=965 setdpcontrolport is a MIG method on the hostprivport so this bug is a root-kernel escalation. kernreturnt setdpcontrolport hostprivt hostpriv, ipcportt controlport if hostpriv...

Apple macOS 10.12 16A323 XNU Kernel iOS 10.1.1 - set_dp_control_port Lack of Locking Use-After-Free

Apple macOS 10.12 16A323 XNU Kernel iOS 10.1.1 - setdpcontrolport Lack of Locking Use-After-Free Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=965 setdpcontrolport is a MIG method on the hostprivport so this bug is a root-kernel escalation. kernreturnt setdpcontrolport hostpri...

Apple macOS 10.12 16A323 XNU Kernel / iOS 10.1.1 - 'set_dp_control_port' Lack of Locking Use-After-Free

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=965 setdpcontrolport is a MIG method on the hostprivport so this bug is a root-kernel escalation. kernreturnt setdpcontrolport hostprivt hostpriv, ipcportt controlport if hostpriv == HOSTPRIVNULL return KERNINVALIDHOST; if...

task_t considered harmful

Posted by Ian Beer, Project Zero This post discusses a design issue at the core of the XNU kernel which powers iOS and MacOS. Apple have shipped two iterations of mitigations followed yesterday by a large refactor in MacOS 10.12.1/iOS 10.1. We’ll look at the bugs, how they can be exploited to...

Apple Mac OSX iOS - Unsandboxable Kernel Code Exection Due to iokit Double Release in IOKit

Apple Mac OSX iOS - Unsandboxable Kernel Code Exection Due to iokit Double Release in IOKit Source: https://code.google.com/p/google-security-research/issues/detail?id=620 I wanted to demonstrate that these iOS/OS X kernel race condition really are exploitable so here's a PoC which gets RIP on OS...

Apple Mac OSX / iOS - Unsandboxable Kernel Code Exection Due to iokit Double Release in IOKit

Exploit for multiple platform in category dos / poc Source: https://code.google.com/p/google-security-research/issues/detail?id=620 I wanted to demonstrate that these iOS/OS X kernel race condition really are exploitable so here's a PoC which gets RIP on OS X. The same techniques should transfer...

The vulnerability of the iOS operating system, which allows a hacker to trigger a service failure

The vulnerability of the XNU kernel component of the iOS operating system exists due to insufficient checking of input data. Exploiting this vulnerability allows a malicious actor to cause service failure by sending a TCP packet containing a specially crafted header...

Apple Mac OS X Lion Kernel xnu Privilege Escalation

/ Apple Mac OS X Lion Kernel Notes: This exploit leverage a stack overflow vulnerability to escalate privileges. The vulnerable function nfsconvertoldnfsargs does not verify the size of a user-provided argument before copying it to the stack. As a result by passing a large size, a local user can...

Apple Mac OSX (Lion) Kernel xnu-1699.32.7 except xnu-1699.24.8 NFS Mount - Local Privilege Escalation

/ Apple Mac OS X Lion Kernel Notes: This exploit leverage a stack overflow vulnerability to escalate privileges. The vulnerable function nfsconvertoldnfsargs does not verify the size of a user-provided argument before copying it to the stack. As a result by passing a large size, a local user can...

CVE-2013-3954

The posixspawn system call in the XNU kernel in Apple Mac OS X 10.8.x does not properly validate the data for file actions and port actions, which allows local users to 1 cause a denial of service panic via a size value that is inconsistent with a header count field, or 2 obtain sensitive...

CVE-2013-3949

The posixspawn system call in the XNU kernel in Apple Mac OS X 10.8.x does not prevent use of the POSIXSPAWNDISABLEASLR and POSIXSPAWNALLOWDATAEXEC flags for setuid and setgid programs, which allows local users to bypass intended access restrictions via a wrapper program that calls the...