About the security content of Safari 12

This document describes the security content of Safari 12.

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 12

Safari

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: A malicious website may be able to exfiltrate autofilled data in Safari

Description: A logic issue was addressed with improved state management.

CVE-2018-4307: Rafay Baloch of Pakistan Telecommunications Authority

Safari

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: A user may be unable to delete browsing history items

Description: Clearing a history item may not clear visits with redirect chains. The issue was addressed with improved data deletion.

CVE-2018-4329: Hugo S. Diaz (coldpointblue)

Safari

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: Visiting a malicious website by clicking a link may lead to user interface spoofing

Description: An inconsistent user interface issue was addressed with improved state management.

CVE-2018-4195: xisigr of Tencent's Xuanwu Lab (www.tencent.com)

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: A malicious website may cause unexepected cross-origin behavior

Description: A cross-origin issue existed with iframe elements. This was addressed with improved tracking of security origins.

CVE-2018-4319: John Pettitt of Google

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: Unexpected interaction causes an ASSERT failure

Description: A memory corruption issue was addressed with improved validation.

CVE-2018-4191: found by OSS-Fuzz

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: A malicious website may be able to execute scripts in the context of another website

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

CVE-2018-4309: an anonymous researcher working with Trend Micro's Zero Day Initiative

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

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

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

CVE-2018-4299: Samuel Groβ (saelo) working with Trend Micro's Zero Day Initiative

CVE-2018-4323: Ivan Fratric of Google Project Zero

CVE-2018-4328: Ivan Fratric of Google Project Zero

CVE-2018-4358: @phoenhex team (@bkth_ @5aelo @_niklasb) working with Trend Micro's Zero Day Initiative

CVE-2018-4359: Samuel Groß (@5aelo)

CVE-2018-4360: William Bowling (@wcbowling)

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: Cross-origin SecurityErrors includes the accessed frame’s origin

Description: The issue was addressed by removing origin information.

CVE-2018-4311: Erling Alf Ellingsen (@steike)

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: A malicious website may exfiltrate image data cross-origin

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

CVE-2018-4345: Jun Kokatsu (@shhnjk)

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

Impact: Unexpected interaction causes an ASSERT failure

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

CVE-2018-4361: found by OSS-Fuzz

CVE-2018-4474: found by OSS-Fuzz

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

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

Description: A use after free issue was addressed with improved memory management.

CVE-2018-4312: Ivan Fratric of Google Project Zero

CVE-2018-4315: Ivan Fratric of Google Project Zero

CVE-2018-4197: Ivan Fratric of Google Project Zero

CVE-2018-4314: Ivan Fratric of Google Project Zero

CVE-2018-4318: Ivan Fratric of Google Project Zero

CVE-2018-4306: Ivan Fratric of Google Project Zero

CVE-2018-4317: Ivan Fratric of Google Project Zero

WebKit

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, macOS Mojave 10.14

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

Description: A memory corruption issue was addressed with improved state management.

CVE-2018-4316: crixer, Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan Team

Additional recognition

WebKit

We would like to acknowledge Cary Hartline, Hanming Zhang from 360 Vuclan team, Tencent Keen Security Lab working with Trend Micro's Zero Day Initiative, and Zach Malone of CA Technologies for their assistance.