About the security content of OS X El Capitan v10.11.6 and Security Update 2016-004

This document describes the security content of OS X El Capitan v10.11.6 and Security Update 2016-004.

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OS X El Capitan v10.11.6 and Security Update 2016-004

Released July 18, 2016

apache_mod_php

Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11 and later

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

Description: Multiple issues existed in PHP versions prior to 5.5.36. These were addressed by updating PHP to version 5.5.36.

CVE-2016-5093

CVE-2016-5094

CVE-2016-5096

CVE-2013-7456

Audio

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to cause a system denial of service

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

CVE-2016-4649 : Juwei Lin(@fuzzerDOTcn) of Trend Micro

Audio

Available for: OS X El Capitan v10.11 and later

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

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

CVE-2016-4647 : Juwei Lin(@fuzzerDOTcn) of Trend Micro

Audio

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to determine kernel memory layout

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

CVE-2016-4648 : Juwei Lin(@fuzzerDOTcn) of Trend Micro; Jack Tang and Moony Li of Trend Micro working with Trend Micro's Zero Day Initiative

Audio

Available for: OS X El Capitan v10.11 and later

Impact: Parsing a maliciously crafted audio file may lead to the disclosure of user information

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

CVE-2016-4646 : Steven Seeley of Source Incite working with Trend Micro's Zero Day Initiative

bsdiff

Available for: OS X El Capitan v10.11 and later

Impact: A local attacker may be able to cause unexpected application termination or arbitrary code execution

Description: An integer overflow existed in bspatch. This issue was addressed through improved bounds checking.

CVE-2014-9862 : an anonymous researcher

CFNetwork

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to view sensitive user information

Description: A permissions issue existed in the handling of web browser cookies. This issue was addressed through improved restrictions.

CVE-2016-4645 : Abhinav Bansal of Zscaler Inc.

CFNetwork Credentials

Available for: OS X El Capitan v10.11 and later

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

Description: A downgrade issue existed with HTTP authentication credentials saved in Keychain. This issue was addressed by storing the authentication types with the credentials.

CVE-2016-4644 : Jerry Decime coordinated via CERT

CFNetwork Proxies

Available for: OS X El Capitan v10.11 and later

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

Description: A validation issue existed in the parsing of 407 responses. This issue was addressed through improved response validation.

CVE-2016-4643 : Xiaofeng Zheng of Blue Lotus Team, Tsinghua University; Jerry Decime coordinated via CERT

CFNetwork Proxies

Available for: OS X El Capitan v10.11 and later

Impact: An application may unknowingly send a password unencrypted over the network

Description: Proxy authentication incorrectly reported HTTP proxies received credentials securely. This issue was addressed through improved warnings.

CVE-2016-4642 : Jerry Decime coordinated via CERT

CoreGraphics

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to elevate privileges

Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed through improved input validation.

CVE-2016-4652 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative

CoreGraphics

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

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

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

CVE-2016-4637 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)

FaceTime

Available for: OS X El Capitan v10.11 and later

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 FaceTime display logic.

CVE-2016-4635 : Martin Vigo

Graphics Drivers

Available for: OS X El Capitan v10.11 and later

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

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

CVE-2016-4634 : Stefan Esser of SektionEins

ImageIO

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

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

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-4629 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)

CVE-2016-4630 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)

ImageIO

Available for: OS X El Capitan v10.11 and later

Impact: A remote attacker may be able to cause a denial of service

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

CVE-2016-4632 : Evgeny Sidorov of Yandex

ImageIO

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-4631 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)

Intel Graphics Driver

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-4633 : Marco Grassi (@marcograss) of KeenLab (@keen_lab), Tencent

IOHIDFamily

Available for: OS X El Capitan v10.11 and later

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

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

CVE-2016-4626 : Stefan Esser of SektionEins

IOSurface

Available for: OS X El Capitan v10.11 and later

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

Description: A use-after-free was addressed through improved memory management.

CVE-2016-4625 : Ian Beer of Google Project Zero

Kernel

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-1863 : Ian Beer of Google Project Zero

CVE-2016-4653 : Ju Zhu of Trend Micro

CVE-2016-4582 : Shrek_wzw and Proteas of Qihoo 360 Nirvan Team

Kernel

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to cause a system denial of service

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

CVE-2016-1865 : Marco Grassi (@marcograss) of KeenLab (@keen_lab), Tencent, CESG

Libc

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution

Description: A buffer overflow existed within the "link_ntoa()" function in linkaddr.c. This issue was addressed through additional bounds checking.

CVE-2016-6559 : Apple

Entry added January 10, 2017

libc++abi

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-4621 : an anonymous researcher

libexpat

Available for: OS X El Capitan v10.11 and later

Impact: Processing maliciously crafted XML may lead to unexpected application termination or arbitrary code execution

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-0718 : Gustavo Grieco

LibreSSL

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple issues existed in LibreSSL before 2.2.7. These were addressed by updating LibreSSL to version 2.2.7.

CVE-2016-2108 : Huzaifa Sidhpurwala (Red Hat), Hanno Böck, David Benjamin (Google), Mark Brand and Ian Beer of Google Project Zero

CVE-2016-2109 : Brian Carpenter

libxml2

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

Impact: Multiple vulnerabilities in libxml2

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-1836 : Wei Lei and Liu Yang of Nanyang Technological University

CVE-2016-4447 : Wei Lei and Liu Yang of Nanyang Technological University

CVE-2016-4448 : Apple

CVE-2016-4483 : Gustavo Grieco

CVE-2016-4614 : Nick Wellnhofer

CVE-2016-4615 : Nick Wellnhofer

CVE-2016-4616 : Michael Paddon

CVE-2016-4619 : Hanno Boeck

libxml2

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

Impact: Parsing a maliciously crafted XML document may lead to disclosure of user information

Description: An access issue existed in the parsing of maliciously crafted XML files. This issue was addressed through improved input validation.

CVE-2016-4449 : Kostya Serebryany

libxslt

Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later

Impact: Multiple vulnerabilities in libxslt

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-1684 : Nicolas Grégoire

CVE-2016-4607 : Nick Wellnhofer

CVE-2016-4608 : Nicolas Grégoire

CVE-2016-4609 : Nick Wellnhofer

CVE-2016-4610 : Nick Wellnhofer

CVE-2016-4612 : Nicolas Grégoire

Login Window

Available for: OS X El Capitan v10.11 and later

Impact: A malicious application may be able to gain root privileges

Description: A type confusion issue was addressed through improved memory handling.

CVE-2016-4638 : Yubin Fu of Tencent KeenLab working with TrendMicro's Zero Day Initiative

Login Window

Available for: OS X El Capitan v10.11 and later

Impact: A malicious application may be able to execute arbitrary code leading to compromise of user information

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

CVE-2016-4640 : an anonymous researcher working with Trend Micro’s Zero Day Initiative

Entry updated November 16, 2016

Login Window

Available for: OS X El Capitan v10.11 and later

Impact: A malicious application may be able to execute arbitrary code leading to the compromise of user information

Description: A type confusion issue was addressed through improved memory handling.

CVE-2016-4641 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative

Login Window

Available for: OS X El Capitan v10.11 and later

Impact: A local user may be able to cause a denial of service

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

CVE-2016-4639 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative

OpenSSL

Available for: OS X El Capitan v10.11 and later

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

Description: Multiple issues existed in OpenSSL. These issues were resolved by backporting the fixes from OpenSSL 1.0.2h/1.0.1 to OpenSSL 0.9.8.

CVE-2016-2105 : Guido Vranken

CVE-2016-2106 : Guido Vranken

CVE-2016-2107 : Juraj Somorovsky

CVE-2016-2108 : Huzaifa Sidhpurwala (Red Hat), Hanno Böck, David Benjamin (Google), Mark Brand and Ian Beer of Google Project Zero

CVE-2016-2109 : Brian Carpenter

CVE-2016-2176 : Guido Vranken

QuickTime

Available for: OS X El Capitan v10.11 and later

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

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

CVE-2016-4601 : Ke Liu of Tencent's Xuanwu Lab

QuickTime

Available for: OS X El Capitan v10.11 and later

Impact: Processing a maliciously crafted Photoshop document may lead to unexpected application termination or arbitrary code execution

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

CVE-2016-4599 : Ke Liu of Tencent's Xuanwu Lab

QuickTime

Available for: OS X El Capitan v10.11 and later

Impact: Processing a maliciously crafted FlashPix Bitmap Image may lead to unexpected application termination or arbitrary code execution

Description: Multiple memory corruption issues were addressed through improved memory handling.

CVE-2016-4596 : Ke Liu of Tencent's Xuanwu Lab

CVE-2016-4597 : Ke Liu of Tencent's Xuanwu Lab

CVE-2016-4600 : Ke Liu of Tencent's Xuanwu Lab

CVE-2016-4602 : Ke Liu of Tencent's Xuanwu Lab

QuickTime

Available for: OS X El Capitan v10.11 and later

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

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

CVE-2016-4598 : Ke Liu of Tencent's Xuanwu Lab

Safari Login AutoFill

Available for: OS X El Capitan v10.11 and later

Impact: A user's password may be visible on screen

Description: An issue existed in Safari's password auto-fill. This issue was addressed through improved matching of form fields.

CVE-2016-4595 : Jonathan Lewis from DeARX Services (PTY) LTD

Sandbox Profiles

Available for: OS X El Capitan v10.11 and later

Impact: A local application may be able to access the process list

Description: An access issue existed with privileged API calls. This issue was addressed through additional restrictions.

CVE-2016-4594 : Stefan Esser of SektionEins

OS X El Capitan v10.11.6 includes the security content of Safari 9.1.2.

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