CVE-2021-1870: Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability
CVE-2021-1870 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03
A logic vulnerability in the WebKit engine allows for remote code execution when processing maliciously crafted web content. The issue was addressed by improving restrictions within the logic flow. This vulnerability has been reported as being actively exploited in the wild.
Yes. CVE-2021-1870 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-1870?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Apple WebKit; Apple iOS before 14.4; Apple iPadOS before 14.4; Apple macOS Big Sur before 11.2; and 2 more.
Is there a fix for CVE-2021-1870?
A patch was published on 2021-01-26: Fixed in iOS 14.4, iPadOS 14.4, macOS Big Sur 11.2, and Security Updates for Catalina and Mojave. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-1870 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-1870?
Check whether you run Apple iPadOS or Apple macOS. 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 WebKit
Apple iOS before 14.4
Apple iPadOS before 14.4
Apple macOS Big Sur before 11.2
Apple macOS Catalina Security Update 2021-001
Apple macOS Mojave Security Update 2021-001
Timeline
2021-01-26: patched: Fixed in iOS 14.4, iPadOS 14.4, macOS Big Sur 11.2, and Security Updates for Catalina and Mojave.
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
2021-11-03: disclosed: NVD publication date.
2021-01-26: exploited: Apple reported awareness of active exploitation at time of patch release.