PT-2021-4452 · Apple+8 · Macos Big Sur+13

Published 2021-05-03 · Updated 2025-10-23 · CVE-2021-30663

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 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 Safari versions prior to 14.1.1 macOS Big Sur versions prior to 11.3.1

Description An integer overflow issue was addressed with improved input validation. Processing maliciously crafted web content may lead to arbitrary code execution. The issue can be exploited by a remote attacker to execute arbitrary code.

Recommendations 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 Safari versions prior to 14.1.1, update to Safari 14.1.1 or later. For macOS Big Sur versions prior to 11.3.1, update to macOS Big Sur 11.3.1 or later.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALSA-2021:4381

BDU:2021-05083

CESA-2021_4381

CVE-2021-30663

DSA-4945-1

MGASA-2021-0400

OPENSUSE-SU-2021:1101-1

OPENSUSE-SU-2021:2598-1

OPENSUSE-SU-2021_1101-1

OPENSUSE-SU-2021_2598-1

RHSA-2021:4381

RHSA-2021_4381

RHSA-2025:10364

RLSA-2021:4381

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

Safari

Suse

Ubuntu

Ios

Ipados

Macos Big Sur

Tvos

References · 178

• 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://osv.dev/vulnerability/UBUNTU-CVE-2021-30663 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-21779 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30665 · Vendor Advisory
• https://support.apple.com/en-us/HT212534 · Vendor Advisory
• https://support.apple.com/en-us/HT212335 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2598-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2762-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30663 · Security Note
• https://support.apple.com/en-us/HT212336 · Vendor Advisory
• https://support.apple.com/en-us/HT212532 · Vendor Advisory