CVE-2021-1789: Apple Multiple Products Type Confusion Vulnerability

CVE-2021-1789 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-04

A type confusion vulnerability in multiple Apple operating systems and Safari allows for arbitrary code execution when processing maliciously crafted web content. The issue was addressed through improved state handling.

Technologies: Apple Multiple Products. Vendors: Apple.

Quick answers

Is CVE-2021-1789 exploited in the wild?
Yes. CVE-2021-1789 is known to be exploited in the wild, first recorded on 4 May 2022. Treat it as urgent.
How severe is CVE-2021-1789?
Critical severity, with a CVSS score of 8.8, published 4 May 2022.
Which products and versions are affected?
Apple macOS Big Sur Before 11.2; Apple macOS Catalina Before Security Update 2021-001; Apple macOS Mojave Before Security Update 2021-001; Apple tvOS Before 14.4; and 4 more.
Is there a fix for CVE-2021-1789?
A patch was published on 2021-01-26: Initial vendor security updates released for iOS, iPadOS, and tvOS. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-1789 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2021-1789?
Check whether you run Apple Multiple Products. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Apple macOS Big Sur Before 11.2
  • Apple macOS Catalina Before Security Update 2021-001
  • Apple macOS Mojave Before Security Update 2021-001
  • Apple tvOS Before 14.4
  • Apple watchOS Before 7.3
  • Apple iOS Before 14.4
  • Apple iPadOS Before 14.4
  • Apple Safari Before 14.0.3

Timeline

  • 2022-05-04: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-05-04: disclosed
  • 2021-01-26: patched: Initial vendor security updates released for iOS, iPadOS, and tvOS.

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