All vulnerabilities
CVE-2021-30661

Apple Multiple Products WebKit Storage Use-After-Free Vulnerability

Apple Multiple Products
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 3 Nov 2021CISA KEV
Exploit odds (EPSS)4.49%Chance of exploitation activity in the next 30 days, higher than 91% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in14.5Also 14.1, 7.4 and 2 moreCVE List
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 8 Sep 2021, 14:48 UTCPublishedCVE List
  2. 3 Nov 2021Added to CISA KEVCISA KEV

Description

Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit Storage contain a use-after-free 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.

Text from CVE List

Affected versions 6

  • iOS and iPadOSaffected: unspecified before 14.5CVE List
  • Safariaffected: unspecified before 14.1CVE List
  • tvOSaffected: unspecified before 14.5CVE List
  • watchOSaffected: unspecified before 7.4CVE List
  • macOSaffected: unspecified before 11.3CVE List
  • macOSaffected: unspecified before 12.5CVE List

References 8