CVE-2024-23222: Apple Multiple Products WebKit Type Confusion Vulnerability

What it is

A type confusion issue was addressed with improved checks. This issue is fixed in Safari 17.3, iOS 15.8.7 and iPadOS 15.8.7, iOS 16.7.5 and iPadOS 16.7.5, iOS 17.3 and iPadOS 17.3, macOS Monterey 12.7.3, macOS Sonoma 14.3, macOS Ventura 13.6.4, tvOS 17.3, visionOS 1.0.2. Processing maliciously crafted web content may lead to arbitrary code execution. This fix associated with the Coruna exploit was shipped in iOS 17.3 on January 22, 2024. This update brings that fix to devices that cannot update to the latest iOS version.

Exploitation evidence

First exploit evidence seen: 2024-01-23 (earliest date across the sources below).

Exploited in the wild

• CISA KEV: listed since 2024-01-23. Source

Public exploit code

GitHub proof-of-concept repositories

3 public repositories from 3 accounts, first seen 2026-03-10. Most starred: FuzzySecurity/Cassowary-CVE-2024-23222-x86_64 (11 stars), view repository.

Verify before running: public PoCs can be malicious. Read the code and only run it in an isolated lab. A PoC means exploit code is public, not that this CVE is exploited in the wild.

Sources: CISA KEV · nomi-sec/PoC-in-GitHub.

How to fix it

CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. (source: CISA KEV)

Fixed versions

• apple safari: upgrade to 17.3 or later
• apple ipados: upgrade to 15.8.7 or later
• apple ipados: upgrade to 16.7.5 or later (affected from 16.0)
• apple ipados: upgrade to 17.3 or later (affected from 17.0)
• apple iphone os: upgrade to 15.8.7 or later
• apple iphone os: upgrade to 16.7.5 or later (affected from 16.0)
• apple iphone os: upgrade to 17.3 or later (affected from 17.0)
• apple macos: upgrade to 12.7.3 or later (affected from 12.0)
• apple macos: upgrade to 13.6.4 or later (affected from 13.0)
• apple macos: upgrade to 14.3 or later (affected from 14.0)
• apple tvos: upgrade to 17.3 or later
• apple visionos: upgrade to 1.0.2 or later

Derived from the NVD CPE configuration (versionEndExcluding / versionEndIncluding). Always confirm with the vendor advisory.

Vendor advisories and patches

• https://support.apple.com/en-us/HT214055 (CISA KEV notes)
• https://support.apple.com/en-us/HT214056 (CISA KEV notes)
• https://support.apple.com/en-us/HT214057 (CISA KEV notes)
• https://support.apple.com/en-us/HT214058 (CISA KEV notes)
• https://support.apple.com/en-us/HT214059 (CISA KEV notes)
• https://support.apple.com/en-us/HT214061 (CISA KEV notes)
• https://support.apple.com/en-us/HT214063 (CISA KEV notes)
• https://support.apple.com/en-us/118479 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120304 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120305 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120307 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120309 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120310 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120311 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/120339 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/126632 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214055 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214056 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214057 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214058 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214059 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214061 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214063 (Release Notes, Vendor Advisory)
• https://support.apple.com/kb/HT214070 (Release Notes, Vendor Advisory)

MITRE ATT&CK mitigations for this chain

• M1050 Exploit Protection (for T1203) : Security applications that look for behavior used during exploitation such as Windows Defender Exploit Guard (WDEG) and the Enhanced Mitigation Experience Toolkit (EMET) can be used to mitigate some exploitation behavior. Control flow integrity checking is another way to potentially identify and stop a software exploi
• M1051 Update Software (for T1203) : Perform regular software updates to mitigate exploitation risk. Keeping software up-to-date with the latest security patches helps prevent adversaries from exploiting known vulnerabilities in client software, reducing the risk of successful attacks.
• M1048 Application Isolation and Sandboxing (for T1203) : Browser sandboxes can be used to mitigate some of the impact of exploitation, but sandbox escapes may still exist. Other types of virtualization and application microsegmentation may also mitigate the impact of client-side exploitation. Risks of additional exploits and weaknesses in those systems may still exist.

Detection Generic guidance

• Execution: Watch for the service process spawning shells or script interpreters (cmd.exe, powershell, sh, bash, python) via EDR process-tree rules.

Response checklist Generic guidance

1. Inventory: find every instance of the affected product and version (include internet-facing and forgotten ones).
2. Patch or mitigate per the vendor advisory; if you cannot patch, remove internet exposure or apply the vendor workaround.
3. Assume compromise if the system was exposed before patching: hunt for the indicators in the advisory and review logs back to the disclosure date.
4. Rotate credentials and secrets stored on or used by the affected system if compromise cannot be ruled out.