About the security content of macOS Sierra 10.12.1, Security Update 2016-002 El Capitan, and Security Update 2016-006 Yosemite

This document describes the security content of macOS Sierra 10.12.1, Security Update 2016-002 El Capitan, and Security Update 2016-006 Yosemite.

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macOS Sierra 10.12.1, Security Update 2016-002 El Capitan, and Security Update 2016-006 Yosemite

Released October 24, 2016

AppleGraphicsControl

Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6

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

Description: A memory corruption issue was addressed through improved lock state checking.

CVE-2016-4662: Apple

AppleMobileFileIntegrity

Available for: macOS Sierra 10.12

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 November 27, 2016

AppleSMC

Available for: macOS Sierra 10.12

Impact: A local user may be able to elevate privileges

Description: A null pointer dereference was addressed through improved locking.

CVE-2016-4678: daybreaker@Minionz working with Trend Micro's Zero Day Initiative

ATS

Available for: macOS Sierra 10.12

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

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

CVE-2016-4667: Simon Huang of alipay, Thelongestusernameofall@gmail.com, Moony Li of TrendMicro, @Flyic

Entry updated October 27, 2016

ATS

Available for: macOS Sierra 10.12

Impact: A local user may be able to execute arbitrary code with additional privileges

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

CVE-2016-4674: Shrek_wzw of Qihoo 360 Nirvan Team

CFNetwork Proxies

Available for: macOS Sierra 10.12

Impact: An attacker in a privileged network position may be able to leak sensitive user information

Description: A phishing issue existed in the handling of proxy credentials. This issue was addressed by removing unsolicited proxy password authentication prompts.

CVE-2016-7579: Jerry Decime

Core Image

Available for: OS X El Capitan v10.11.6

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

Description: A memory corruption issue was addressed through improved input validation.

CVE-2016-4681: Ke Liu of Tencent's Xuanwu Lab

Entry added October 25, 2016

CoreGraphics

Available for: macOS Sierra 10.12

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

FaceTime

Available for: macOS Sierra 10.12

Impact: An attacker in a privileged network position may be able to cause a relayed call to continue transmitting audio while appearing as if the call terminated

Description: User interface inconsistencies existed in the handling of relayed calls. These issues were addressed through improved protocol logic.

CVE-2016-7577: Martin Vigo (@martin_vigo) of salesforce.com

Entry added October 27, 2016

FontParser

Available for: macOS Sierra 10.12

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: macOS Sierra 10.12

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

IDS - Connectivity

Available for: macOS Sierra 10.12

Impact: An attacker in a privileged network position may be able to trick a user on a multi-party call into believing they are talking to the other party

Description: An impersonation issue existed in the handling of call switching. This issue was addressed through improved handling of "switch caller" notifications.

CVE-2016-4721: Martin Vigo (@martin_vigo) of salesforce.com

Entry added October 27, 2016

ImageIO

Available for: OS X El Capitan v10.11.6

Impact: Parsing a maliciously crafted PDF may lead to arbitrary code execution

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

CVE-2016-4671: Ke Liu of Tencent's Xuanwu Lab, Juwei Lin (@fuzzerDOTcn)

ImageIO

Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6

Impact: Processing a maliciously crafted image may result in the disclosure of process memory

Description: An out-of-bounds read issue existed in the SGI image parsing. This issue was addressed through improved bounds checking.

CVE-2016-4682: Ke Liu of Tencent's Xuanwu Lab

ImageIO

Available for: OS X El Capitan v10.11.6

Impact: A remote attacker may be able to execute arbitrary code

Description: Multiple out-of-bounds read and write issues exited in SGI parsing. These issues was addressed through improved input validation.

CVE-2016-4683: Ke Liu of Tencent’s Xuanwu Lab

Entry added October 25, 2016

Kernel

Available for: OS X Yosemite 10.10.5, OS X El Capitan 10.11.6, and macOS Sierra 10.12

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: macOS Sierra 10.12

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: macOS Sierra 10.12

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: macOS Sierra 10.12

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

Entry updated March 30, 2017

ntfs

Available for: macOS Sierra 10.12

Impact: An application may be able to cause a denial of service

Description: An issue existed in the parsing of disk images. This issue was addressed through improved validation.

CVE-2016-4661: Recurity Labs on behalf of BSI (German Federal Office for Information Security)

NVIDIA Graphics Drivers

Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6

Impact: An application may be able to cause a denial of service

Description: A memory corruption issue was addressed through improved input validation.

CVE-2016-4663: Apple

Security

Available for: macOS Sierra 10.12

Impact: A local attacker can observe the length of a login password when a user logs in

Description: A logging issue existed in the handling of passwords. This issue was addressed by removing password length logging.

CVE-2016-4670: Daniel Jalkut of Red Sweater Software

Entry updated October 25, 2016

Thunderbolt

Available for: macOS Sierra 10.12

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

Description: A null pointer dereference was addressed through improved input validation. 

CVE-2016-4780: sweetchip of Grayhash

Entry added November 29, 2016

macOS Sierra 10.12.1 includes the security content of Safari 10.0.1.

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