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CVE-2023-32439

Apple Multiple Products WebKit Type Confusion

8.8 HIGHActively exploited (CISA KEV)EPSS 24.0%
  1. Published23 Jun 2023
  2. Added to CISA KEV23 Jun 2023
  3. Remediation due14 Jul 2023
Actively exploited (CISA KEV)

Apple iOS, iPadOS, macOS, and Safari WebKit contain a type confusion vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Added to KEV: 23 Jun 2023Federal remediation due: 14 Jul 2023

Description

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple Safari< 16.5.1
Webkitgtk Webkitgtk+< 2.42.3
Apple iPadOS≥ 16.0 < 16.5.1 · < 15.7.7
Apple iPhone OS≥ 16.0 < 16.5.1 · < 15.7.7
Apple macOS≥ 13.0 < 13.4.1

Remediation

Fixed in
Apple Safari≥ 16.5.1
Webkitgtk Webkitgtk+≥ 2.42.3
Apple iPadOS≥ 16.5.1
Apple iPhone OS≥ 16.5.1
Apple macOS≥ 13.4.1

References

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Frequently asked

Is CVE-2023-32439 being actively exploited?

Yes. CVE-2023-32439 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 23 Jun 2023.

How severe is CVE-2023-32439?

CVE-2023-32439 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 24.0% probability of exploitation.

Which products are affected by CVE-2023-32439?

Affected products include Apple Safari, Webkitgtk Webkitgtk+, Apple iPadOS, Apple iPhone OS, Apple macOS.

How do I fix CVE-2023-32439?

Upgrade affected software to a fixed version, for example Apple Safari 16.5.1, Webkitgtk Webkitgtk+ 2.42.3, Apple iPadOS 16.5.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-32439 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.