PT-2021-4451 · Apple+8 · Ipados+13

Bianliang + 3 · Published 2021-05-03 · Updated 2025-10-23 · CVE-2021-30665

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions watchOS versions prior to 7.4.1 iOS versions prior to 14.5.1 iPadOS versions prior to 14.5.1 tvOS versions prior to 14.6 iOS versions prior to 12.5.3 macOS Big Sur versions prior to 11.3.1

Description A memory corruption issue was addressed with improved state management. 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.

Recommendations For watchOS versions prior to 7.4.1, update to watchOS 7.4.1 or later. For iOS versions prior to 14.5.1, update to iOS 14.5.1 or later. For iPadOS versions prior to 14.5.1, update to iPadOS 14.5.1 or later. For tvOS versions prior to 14.6, update to tvOS 14.6 or later. For iOS versions prior to 12.5.3, update to iOS 12.5.3 or later. For macOS Big Sur versions prior to 11.3.1, update to macOS Big Sur 11.3.1 or later.

Fix

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

ALSA-2021:4381

BDU:2021-05082

CESA-2021_4381

CVE-2021-30665

DSA-4945-1

ELSA-2021-4381

MGASA-2021-0400

OPENSUSE-SU-2021:1101-1

OPENSUSE-SU-2021:2598-1

OPENSUSE-SU-2021_1101-1

OPENSUSE-SU-2021_2598-1

OPENSUSE-SU-2024:11506-1

RHSA-2021:4381

RHSA-2021_4381

RHSA-2025:10364

RLSA-2021:4381

RLSA-2021_4381

SUSE-SU-2021:2598-1

SUSE-SU-2021:2600-1

SUSE-SU-2021:2762-1

SUSE-SU-2021_2598-1

SUSE-SU-2021_2600-1

SUSE-SU-2021_2762-1

USN-5024-1

Affected Products

Almalinux

Astra Linux

Centos

Linuxmint

Apple Macos

Red Hat

Rocky Linux

Suse

Ubuntu

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 298

• https://support.apple.com/en-us/HT212341 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-21775 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30720 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4945-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5024-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-21779 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30665 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-30665 · Security Note
• https://support.apple.com/en-us/HT212335 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-30665 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2598-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-30665 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2762-1 · Vendor Advisory
• https://support.apple.com/en-us/HT212336 · Vendor Advisory
• https://support.apple.com/en-us/HT212532 · Vendor Advisory