CVE-2021-30858 Information

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8 macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://support.apple.com/en-us/HT212807 https://support.apple.com/en-us/HT212804 http://seclists.org/fulldisclosure/2021/Sep/25 http://seclists.org/fulldisclosure/2021/Sep/27 http://seclists.org/fulldisclosure/2021/Sep/29 http://www.openwall.com/lists/oss-security/2021/09/20/1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/ http://seclists.org/fulldisclosure/2021/Sep/39 http://seclists.org/fulldisclosure/2021/Sep/38 https://www.debian.org/security/2021/dsa-4976 https://www.debian.org/security/2021/dsa-4975 https://support.apple.com/kb/HT212824 http://seclists.org/fulldisclosure/2021/Sep/50 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/ http://www.openwall.com/lists/oss-security/2021/10/26/9 http://www.openwall.com/lists/oss-security/2021/10/27/1 http://www.openwall.com/lists/oss-security/2021/10/27/2 http://www.openwall.com/lists/oss-security/2021/10/27/4

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8