erroneo.us
Search all guides⌘K

Security Digest · Vulnerability record · Known exploited

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

Exploited in the wild (CISA KEV). A type confusion issue was addressed with improved checks.

CISA KEV · added 2024-01-23 CVSS 8.8 High EPSS 10.6% · p96

Updated By erroneo.us Security Desk31 references Seen in the digest for Jan 23, 2024

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

  • Yes, if you run Apple Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-01-23, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-02-13; treat that as the outer limit, not the target.
  • EPSS 10.6%, percentile 96: FIRST’s model estimates a 10.6% chance of exploitation activity in the next 30 days, higher than 96% of all scored CVEs (very high). EPSS is a probability, not a verdict.
  • Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

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.

CISA’s summary

Apple iOS, iPadOS, macOS, tvOS, 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.

Weakness type: CWE-843.

Product: Apple Multiple Products · Assigned by: apple · Published: 2024-01-23

Affected and fixed versions

VendorProductAffected versions (per CVE record)
AppleSafari< 17.3
AppleiOS and iPadOS< 15.8.7, < 16.7.5, < 17.3
ApplemacOS< 12.7.3, < 13.6.4, < 14.3
AppletvOS< 17.3
ApplevisionOS< 1.0.2

Severity scores

Scored byCVSSScoreVector
CISA-ADP3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Attack vector: network (remotely reachable)
  • Attack complexity: low
  • Privileges required: none (no login)
  • User interaction: required (a user must click/open something)
  • Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

  • CISA KEV: added 2024-01-23; federal due date 2024-02-13. Known ransomware use: Unknown.
  • CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • CISA SSVC assessment: exploitation active, automatable no, technical impact total.
  • FIRST EPSS (model of 2026-10-21): 10.59% probability of exploitation activity in the next 30 days; percentile 96.

Timeline

  • — Added to CISA’s Known Exploited Vulnerabilities catalog
  • — CVE record published by apple
  • — CISA remediation deadline for US federal agencies
  • — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

  1. Listed in CISA KEV notes (support.apple.com) support.apple.com
  2. Listed in CISA KEV notes (support.apple.com) support.apple.com
  3. Listed in CISA KEV notes (support.apple.com) support.apple.com
  4. Listed in CISA KEV notes (support.apple.com) support.apple.com
  5. Listed in CISA KEV notes (support.apple.com) support.apple.com
  6. Listed in CISA KEV notes (support.apple.com) support.apple.com
  7. Listed in CISA KEV notes (support.apple.com) support.apple.com

Vulnerability records

  1. CVE.org record CVE-2024-23222 cve.org
  2. NVD entry CVE-2024-23222 nvd.nist.gov

Government

  1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov

Other references from the CVE record and advisory

  1. support.apple.com support.apple.com
  2. support.apple.com support.apple.com
  3. support.apple.com support.apple.com
  4. support.apple.com support.apple.com
  5. support.apple.com support.apple.com
  6. support.apple.com support.apple.com
  7. support.apple.com support.apple.com
  8. support.apple.com support.apple.com
  9. support.apple.com support.apple.com
  10. support.apple.com support.apple.com
  11. support.apple.com support.apple.com
  12. support.apple.com support.apple.com
  13. support.apple.com support.apple.com
  14. support.apple.com support.apple.com
  15. support.apple.com support.apple.com
  16. support.apple.com support.apple.com
  17. lists.fedoraproject.org lists.fedoraproject.org
  18. seclists.org seclists.org
  19. support.apple.com support.apple.com
  20. seclists.org seclists.org
  21. seclists.org seclists.org

All exploited Apple vulnerabilities · Today’s Security Digest