About the security content of iOS 10.1

This document describes the security content of iOS 10.1.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

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

iOS 10.1

Released October 24, 2016

AppleMobileFileIntegrity

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

CFNetwork Proxies

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

Contacts

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

Impact: An application may be able to maintain access to the Address Book after access is revoked in Settings

Description: An access control issue in the Address Book was addressed through improved file-link validation.

CVE-2016-4686: Razvan Deaconescu, Mihai Chiroiu (University POLITEHNICA of Bucharest); Luke Deshotels, William Enck (North Carolina State University); Lucas Vincenzo Davi, Ahmad-Reza Sadeghi (TU Darmstadt)

CoreGraphics

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation 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 protocol logic.

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

Entry added October 27, 2016

FontParser

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

iTunes Backup

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

Impact: An attacker with access to an encrypted iTunes backup may be able to determine the backup password

Description: A password hashing weakness existed in the handling of encrypted iTunes backups. This issue was addressed by removing the weak hash.

CVE-2016-4685: Elcomsoft

Entry added November 14, 2016

Kernel

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

Safari

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

Impact: A malicious website may be able to cause a denial-of-service

Description: A denial of service issue was addressed through improved URL handling.

CVE-2016-7581: Sabri Haddouche (@pwnsdx)

Entry updated December 1, 2016

Sandbox Profiles

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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)

Security

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

WebKit

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

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

CVE-2016-4666: Apple

CVE-2016-4677: An anonymous researcher working with Trend Micro’s Zero Day Initiative

WebKit

Available for: iPhone 5 and later, iPad 4th generation and later, iPod touch 6th generation and later

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

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

CVE-2016-7578: Apple

Entry added October 27, 2016

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