CVE-2021-30818

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, Safari 15, watchOS 8. Processing maliciously crafted web content may lead to arbitrary code execution.

CVSS Metrics

• v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.43%• Percentile: 63%

Techniques & Countermeasures

• CWE-843•Access of Resource Using Incompatible Type ('Type Confusion')

  The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Affected Systems

• Unknown•iOS and iPadOS

  ≥ unspecified, < 14.8 | ≥ unspecified, < 15

• apple•ipados

  < 14.8

• apple•iphone_os

  < 14.8

• Unknown•macOS

  < 12.0.1

• apple•safari

  < 15.0 | ≥ unspecified, < 15

• apple•tvos

  < 15.0 | ≥ unspecified, < 15

• apple•watchos

  < 8.0 | ≥ unspecified, < 8

References (7)

• https://support.apple.com/en-us/HT212807
• https://support.apple.com/en-us/HT212814
• https://support.apple.com/en-us/HT212819
• https://support.apple.com/en-us/HT212815
• https://support.apple.com/en-us/HT212816
• https://support.apple.com/kb/HT212869
• http://www.openwall.com/lists/oss-security/2021/12/20/6