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APPLE-SA-2023-05-18-8 Safari 16.5

Safari 16.5 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT213762.

Apple maintains a Security Updates page at
https://support.apple.com/HT201222 which lists recent
software updates with security advisories.

WebKit
Available for: macOS Big Sur and macOS Monterey
Impact: Processing web content may disclose sensitive information
Description: An out-of-bounds read was addressed with improved input
validation.
WebKit Bugzilla: 255075
CVE-2023-32402: an anonymous researcher

WebKit
Available for: macOS Big Sur and macOS Monterey
Impact: Processing web content may disclose sensitive information
Description: A buffer overflow issue was addressed with improved memory
handling.
WebKit Bugzilla: 254781
CVE-2023-32423: Ignacio Sanmillan (@ulexec)

WebKit
Available for: macOS Big Sur and macOS Monterey
Impact: A remote attacker may be able to break out of Web Content
sandbox. Apple is aware of a report that this issue may have been
actively exploited.
Description: The issue was addressed with improved bounds checks.
WebKit Bugzilla: 255350
CVE-2023-32409: Clément Lecigne of Google's Threat Analysis Group and
Donncha Ó Cearbhaill of Amnesty International’s Security Lab

WebKit
Available for: macOS Big Sur and macOS Monterey
Impact: Processing web content may disclose sensitive information. Apple
is aware of a report that this issue may have been actively exploited.
Description: An out-of-bounds read was addressed with improved input
validation.
WebKit Bugzilla: 254930
CVE-2023-28204: an anonymous researcher

WebKit
Available for: macOS Big Sur and macOS Monterey
Impact: Processing maliciously crafted web content may lead to arbitrary
code execution. Apple is aware of a report that this issue may have been
actively exploited.
Description: A use-after-free issue was addressed with improved memory
management.
WebKit Bugzilla: 254840
CVE-2023-32373: an anonymous researcher

Safari 16.5 may be obtained from the Mac App Store.
All information is also posted on the Apple Security Updates
web site: https://support.apple.com/en-us/HT201222.

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