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CVE-2023-28204

Apple Multiple Products WebKit Out-of-Bounds Read

6.5 MEDIUMActively exploited (CISA KEV)EPSS 14.3%
  1. Published23 Jun 2023
  2. Added to CISA KEV22 May 2023
  3. Remediation due12 Jun 2023
Actively exploited (CISA KEV)

Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information 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: 22 May 2023Federal remediation due: 12 Jun 2023

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information. 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
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

Apple Safari< 16.5
Webkitgtk Webkitgtk+< 2.42.3
Apple iPadOS≥ 16.0 < 16.5 · < 15.7.6
Apple iPhone OS≥ 16.0 < 16.5 · < 15.7.6
Apple macOS≥ 13.0 < 13.4
Apple Tvos< 16.5
Apple Watchos< 9.5

Remediation

Fixed in
Apple Safari≥ 16.5
Webkitgtk Webkitgtk+≥ 2.42.3
Apple iPadOS≥ 16.5
Apple iPhone OS≥ 16.5
Apple macOS≥ 13.4
Apple Tvos≥ 16.5
Apple Watchos≥ 9.5

References

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Frequently asked

Is CVE-2023-28204 being actively exploited?

Yes. CVE-2023-28204 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 22 May 2023.

How severe is CVE-2023-28204?

CVE-2023-28204 has a CVSS 3.1 base score of 6.5, rated medium. EPSS estimates a 14.3% probability of exploitation.

Which products are affected by CVE-2023-28204?

Affected products include Apple Safari, Webkitgtk Webkitgtk+, Apple iPadOS, Apple iPhone OS, Apple macOS, and 2 more.

How do I fix CVE-2023-28204?

Upgrade affected software to a fixed version, for example Apple Safari 16.5, Webkitgtk Webkitgtk+ 2.42.3, Apple iPadOS 16.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-28204 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.