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CVE-2023-32435

Apple Multiple Products WebKit Memory Corruption

8.8 HIGHActively exploited (CISA KEV)EPSS 23.0%
  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 memory corruption 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 memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

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< 16.4
Apple iPadOS≥ 16.0 < 16.4 · < 15.7.7
Apple iPhone OS≥ 16.0 < 16.4 · < 15.7.7
Apple macOS≥ 13.0 < 13.3

Remediation

Fixed in
Apple Safari≥ 16.4
Apple iPadOS≥ 16.4
Apple iPhone OS≥ 16.4
Apple macOS≥ 13.3

References

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Frequently asked

Is CVE-2023-32435 being actively exploited?

Yes. CVE-2023-32435 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 23 Jun 2023.

How severe is CVE-2023-32435?

CVE-2023-32435 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 23.0% probability of exploitation.

Which products are affected by CVE-2023-32435?

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

How do I fix CVE-2023-32435?

Upgrade affected software to a fixed version, for example Apple Safari 16.4, Apple iPadOS 16.4, Apple iPhone OS 16.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-32435 against the real software inventory on every managed device, as each hourly inventory arrives. 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, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. 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.