About the security content of watchOS 3.1

This document describes the security content of watchOS 3.1.

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Apple security documents reference vulnerabilities by CVE-ID when possible.

watchOS 3.1

Released October 24, 2016

AppleMobileFileIntegrity

Available for: All Apple Watch models

Impact: A signed executable may substitute code with the same team ID

Description: A validation issue existed in the handling of code signatures. This issue was addressed through additional validation.

CVE-2016-7584: Mark Mentovai and Boris Vidolov of Google Inc.

Entry added December 6, 2016

CoreGraphics

Available for: All Apple Watch models

Impact: Viewing a maliciously crafted JPEG file may lead to arbitrary code execution

Description: A memory corruption issue was addressed through improved memory handling.

CVE-2016-4673: Marco Grassi (@marcograss) of KeenLab (@keen_lab), Tencent

FontParser

Available for: All Apple Watch models

Impact: Parsing a maliciously crafted font may disclose sensitive user information

Description: An out-of-bounds read was addressed through improved bounds checking.

CVE-2016-4660: Ke Liu of Tencent's Xuanwu Lab

FontParser

Available for: All Apple Watch models

Impact: Processing a maliciously crafted font file may lead to arbitrary code execution 

Description: A buffer overflow existed in the handling of font files. This issue was addressed through improved bounds checking.

CVE-2016-4688: Simon Huang of Alipay company, thelongestusernameofall@gmail.com

Entry added November 27, 2016

Kernel

Available for: All Apple Watch models

Impact: A local user may be able to cause an unexpected system termination or arbitrary code execution in the kernel

Description: Multiple input validation issues existed in MIG generated code. These issues were addressed through improved validation.

CVE-2016-4669: Ian Beer of Google Project Zero

Entry updated November 2, 2016

Kernel

Available for: All Apple Watch models

Impact: An application may be able to disclose kernel memory

Description: A validation issue was addressed through improved input sanitization.

CVE-2016-4680: Max Bazaliy of Lookout and in7egral

Kernel

Available for: All Apple Watch models

Impact: A local application may be able to execute arbitrary code with root privileges

Description: Multiple object lifetime issues existed when spawning new processes. These were addressed through improved validation.

CVE-2016-7613: Ian Beer of Google Project Zero

Entry added November 1, 2016

libarchive

Available for: All Apple Watch models

Impact: A malicious archive may be able to overwrite arbitrary files

Description: An issue existed within the path validation logic for symlinks. This issue was addressed through improved path sanitization.

CVE-2016-4679: Omer Medan of enSilo Ltd

libxpc

Available for: All Apple Watch models

Impact: An application may be able to execute arbitrary code with root privileges

Description: A logic issue was addressed through additional restrictions.

CVE-2016-4675: Ian Beer of Google Project Zero

Sandbox Profiles

Available for: All Apple Watch models

Impact: An application may be able to retrieve metadata of photo directories

Description: An access issue was addressed through additional sandbox restrictions on third party applications.

CVE-2016-4664: Razvan Deaconescu, Mihai Chiroiu (University POLITEHNICA of Bucharest); Luke Deshotels, William Enck (North Carolina State University); Lucas Vincenzo Davi, Ahmad-Reza Sadeghi (TU Darmstadt)

Sandbox Profiles

Available for: All Apple Watch models

Impact: An application may be able to retrieve metadata of audio recording directories

Description: An access issue was addressed through additional sandbox restrictions on third party applications.

CVE-2016-4665: Razvan Deaconescu, Mihai Chiroiu (University POLITEHNICA of Bucharest); Luke Deshotels, William Enck (North Carolina State University); Lucas Vincenzo Davi, Ahmad-Reza Sadeghi (TU Darmstadt)

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