About the security content of tvOS 9.2.2

This document describes the security content of tvOS 9.2.2.

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

tvOS 9.2.2

Released July 18, 2016

CFNetwork Credentials

Available for: Apple TV (4th generation)

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: Apple TV (4th generation)

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: Apple TV (4th generation)

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: Apple TV (4th generation)

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)

ImageIO

Available for: Apple TV (4th generation)

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: Apple TV (4th generation)

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)

IOAcceleratorFamily

Available for: Apple TV (4th generation)

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

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

CVE-2016-4627 : Ju Zhu of Trend Micro

IOHIDFamily

Available for: Apple TV (4th generation)

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

Kernel

Available for: Apple TV (4th generation)

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: Apple TV (4th generation)

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 : CESG, Marco Grassi (@marcograss) of KeenLab(@keen_lab), Tencent

libxml2

Available for: Apple TV (4th generation)

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

libxml2

Available for: Apple TV (4th generation)

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

libxslt

Available for: Apple TV (4th generation)

Impact: Multiple vulnerabilities in libxslt

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

CVE-2016-1683 : Nicolas Grégoire

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

Entry updated April 11, 2017

Sandbox Profiles

Available for: Apple TV (4th generation)

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

WebKit

Available for: Apple TV (4th generation)

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

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

CVE-2016-4586 : Apple

CVE-2016-4588 : Apple

CVE-2016-4589 : Tongbo Luo and Bo Qu of Palo Alto Networks

CVE-2016-4622 : Samuel Gross working with Trend Micro’s Zero Day Initiative

CVE-2016-4623 : Apple

CVE-2016-4624 : Apple

WebKit

Available for: Apple TV (4th generation)

Impact: Processing maliciously crafted web content may disclose image data from another website

Description: A timing issue existed in the processing of SVG. This issue was addressed through improved validation.

CVE-2016-4583 : Roeland Krak

WebKit

Available for: Apple TV (4th generation)

Impact: Processing maliciously crafted web content may result in the disclosure of process memory

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

CVE-2016-4587 : Apple

WebKit

Available for: Apple TV (4th generation)

Impact: Visiting a maliciously crafted website may leak sensitive data

Description: A permissions issue existed in the handling of the location variable. This was addressed though additional ownership checks.

CVE-2016-4591 : ma.la of LINE Corporation

WebKit

Available for: Apple TV (4th generation)

Impact: Processing maliciously crafted web content may lead to a system denial of service

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

CVE-2016-4592 : Mikhail

WebKit Page Loading

Available for: Apple TV (4th generation)

Impact: Processing maliciously crafted web content may lead to arbitrary

code execution

Description: Multiple memory corruption issues were addressed

through improved memory handling.

CVE-2016-4584 : Chris Vienneau

WebKit Page Loading

Available for: Apple TV (4th generation)

Impact: A malicious website may exfiltrate data cross-origin

Description: A cross-site scripting issue existed in Safari URL redirection. This issue was addressed through improved URL validation on redirection.

CVE-2016-4585 : Takeshi Terada of Mitsui Bussan Secure Directions, Inc. (www.mbsd.jp)

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