About the security content of Safari 10

This document describes the security content of Safari 10.

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.

For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.

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

Safari 10

Safari Reader

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

Impact: Enabling the Safari Reader feature on a maliciously crafted webpage may lead to universal cross site scripting

Description: Multiple validation issues were addressed through improved input sanitization.

CVE-2016-4618: Erling Ellingsen

Safari Tabs

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

Impact: Visiting a malicious website may lead to address bar spoofing

Description: A state management issue existed in the handling of tab sessions. This issue was addressed through session state management.

CVE-2016-4751: Daniel Chatfield of Monzo Bank

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

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

Description: A parsing issue existed in the handling of error prototypes. This was addressed through improved validation.

CVE-2016-4728: Daniel Divricean

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

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-2016-4758: Masato Kinugawa of Cure53

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

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

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

CVE-2016-4611: Apple

CVE-2016-4729: Apple

CVE-2016-4730: Apple

CVE-2016-4731: Apple

CVE-2016-4734: natashenka of Google Project Zero

CVE-2016-4735: André Bargull

CVE-2016-4737: Apple

CVE-2016-4759: Tongbo Luo of Palo Alto Networks

CVE-2016-4762: Zheng Huang of Baidu Security Lab

CVE-2016-4766: Apple

CVE-2016-4767: Apple

CVE-2016-4768: Anonymous working with Trend Micro's Zero Day Initiative

CVE-2016-4769: Tongbo Luo of Palo Alto Networks

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

Impact: A malicious website may be able to access non-HTTP services

Description: Safari's support of HTTP/0.9 allowed cross-protocol exploitation of non-HTTP services using DNS rebinding. The issue was addressed by restricting HTTP/0.9 responses to default ports and canceling resource loads if the document was loaded with a different HTTP protocol version.

CVE-2016-4760: Jordan Milne

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

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

Description: Multiple memory corruption issues were addressed through improved state management.

CVE-2016-4733: natashenka of Google Project Zero

CVE-2016-4765: Apple

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

Impact: An attacker in a privileged network position may be able to intercept and alter network traffic to applications using WKWebView with HTTPS

Description: A certificate validation issue existed in the handling of WKWebView. This issue was addressed through improved validation.

CVE-2016-4763: an anonymous researcher

WebKit

Available for: OS X Yosemite v10.10.5, OS X El Capitan v10.11.6, and macOS Sierra 10.12

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

Description: Multiple memory corruption issues were addressed through improved state management.

CVE-2016-4764: Apple