About the security content of Safari 11.1.2

This document describes the security content of Safari 11.1.2.

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 11.1.2

Safari

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

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

CVE-2018-4279: Ruilin Yang, Xu Taoyu (xia0yu.win)

CVE-2018-4362: Jun Kokatsu (@shhnjk)

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash

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

CVE-2018-4270: found by OSS-Fuzz

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

Description: Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking.

CVE-2018-4278: Jun Kokatsu (@shhnjk)

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

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

CVE-2018-4284: found by OSS-Fuzz

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

Description: A race condition was addressed with additional validation.

CVE-2018-4266: found by OSS-Fuzz

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

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

CVE-2018-4261: Omair working with Trend Micro's Zero Day Initiative

CVE-2018-4262: Mateusz Krzywicki working with Trend Micro's Zero Day Initiative

CVE-2018-4263: Arayz working with Trend Micro's Zero Day Initiative

CVE-2018-4264: found by OSS-Fuzz, Yu Zhou and Jundong Xie of Ant-financial Light-Year Security Lab

CVE-2018-4265: cc working with Trend Micro's Zero Day Initiative

CVE-2018-4267: Arayz of Pangu team working with Trend Micro's Zero Day Initiative

CVE-2018-4272: found by OSS-Fuzz

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash

Description: Multiple memory corruption issues were addressed with improved input validation.

CVE-2018-4271: found by OSS-Fuzz

CVE-2018-4273: found by OSS-Fuzz

WebKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4274: Tomasz Bojarski

WebKit Page Loading

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.6

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

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

CVE-2018-4260: xisigr of Tencent's Xuanwu Lab (tencent.com)