PT-2021-5767 · Apple+8 · Watchos+14

Jack Dates + 1 · Published 2021-05-24 · Updated 2023-01-09 · CVE-2021-30734

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 Safari versions prior to 14.1.1 tvOS versions prior to 14.6 iOS versions prior to 14.6 iPadOS versions prior to 14.6 macOS Big Sur versions prior to 11.4 watchOS versions prior to 7.5

Description The issue is related to multiple memory corruption problems that have been addressed with improved memory handling. Processing maliciously crafted web content may lead to arbitrary code execution. This can allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service using malicious web content.

Recommendations For Safari version prior to 14.1.1, update to Safari 14.1.1 or later. For tvOS version prior to 14.6, update to tvOS 14.6 or later. For iOS version prior to 14.6, update to iOS 14.6 or later. For iPadOS version prior to 14.6, update to iPadOS 14.6 or later. For macOS Big Sur version prior to 11.4, update to macOS Big Sur 11.4 or later. For watchOS version prior to 7.5, update to watchOS 7.5 or later.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALSA-2021:4381

BDU:2022-00212

CESA-2021_4381

CVE-2021-30734

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

ZDI-21-769

Affected Products

Almalinux

Astra Linux

Centos

Linuxmint

Apple Macos

Red Hat

Rocky Linux

Safari

Suse

Ubuntu

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 176

• 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://osv.dev/vulnerability/SUSE-SU-2021:2598-1 · Vendor Advisory
• https://support.apple.com/en-us/HT212529 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-769 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:2762-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2022-0114SE47 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2021-4381.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-4381.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-30734 · Vendor Advisory
• https://support.apple.com/en-us/HT212533 · Vendor Advisory