APPLE-SA-2019-3-25-4 Safari 12.1

Safari 12.1 is now available and addresses the following:

Safari Reader
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Enabling the Safari Reader feature on a maliciously crafted
webpage may lead to universal cross site scripting
Description: A logic issue was addressed with improved validation.
CVE-2019-6204: Ryan Pickren (ryanpickren.com)
CVE-2019-8505: Ryan Pickren (ryanpickren.com)

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A type confusion issue was addressed with improved
memory handling.
CVE-2019-8506: Samuel Groß of Google Project Zero

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A memory corruption issue was addressed with improved
state management.
CVE-2019-8535: Zhiyang Zeng (@Wester) of Tencent Blade Team

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2019-6201: dwfault working with ADLab of Venustech
CVE-2019-8518: Samuel Groß of Google Project Zero
CVE-2019-8523: Apple
CVE-2019-8524: G. Geshev working with Trend Micro Zero Day Initiative
CVE-2019-8558: Samuel Groß of Google Project Zero
CVE-2019-8559: Apple
CVE-2019-8563: Apple

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may disclose
sensitive user information
Description: A cross-origin issue existed with the fetch API. This
was addressed with improved input validation.
CVE-2019-8515: James Lee (@Windowsrcer)

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2019-8536: Apple
CVE-2019-8544: an anonymous researcher

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
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-2019-7285: dwfault working at ADLab of Venustech
CVE-2019-8556: Apple

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: A malicious website may be able to execute scripts in the
context of another website
Description: A logic issue was addressed with improved validation.
CVE-2019-8503: Linus Särud of Detectify

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may result in the
disclosure of process memory
Description: A validation issue was addressed with improved logic.
CVE-2019-7292: Zhunki and Zhiyi Zhang of 360 ESG Codesafe Team

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: A sandboxed process may be able to circumvent sandbox
restrictions
Description: A memory corruption issue was addressed with improved
validation.
CVE-2019-8562: Wen Xu of SSLab at Georgia Tech and Hanqing Zhao of
Chaitin Security Research Lab

WebKit
Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and
Mojave 10.14.4
Impact: Processing maliciously crafted web content may lead to
universal cross site scripting
Description: A logic issue was addressed with improved validation.
CVE-2019-8551: Ryan Pickren (ryanpickren.com)

Additional recognition

Safari
We would like to acknowledge Nikhil Mittal (@c0d3G33k) of Payatu Labs
(payatu.com) for their assistance.

WebKit
We would like to acknowledge Andrey Kovalev of Yandex Security Team
for their assistance.

Installation note:

Safari 12.1 may be obtained from the Mac App Store.

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/