PT-2021-6685 · Apple+5 · Watchos+10

André Bargull · Published 2020-11-23 · Updated 2022-07-12 · CVE-2021-1820

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 macOS Big Sur versions prior to 11.3 iOS versions prior to 14.5 iPadOS versions prior to 14.5 watchOS versions prior to 7.4 tvOS versions prior to 14.5

Description A memory initialization issue was addressed with improved memory handling. Processing maliciously crafted web content may result in the disclosure of process memory. This issue is related to the disclosure of information in an erroneous data area, which can be exploited by a remote attacker to gain access to confidential data.

Recommendations For macOS Big Sur versions prior to 11.3, update to macOS Big Sur 11.3 to resolve the issue. For iOS versions prior to 14.5, update to iOS 14.5 to resolve the issue. For iPadOS versions prior to 14.5, update to iPadOS 14.5 to resolve the issue. For watchOS versions prior to 7.4, update to watchOS 7.4 to resolve the issue. For tvOS versions prior to 14.5, update to tvOS 14.5 to resolve the issue.

Exploit

Fix

Improper Initialization

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-665

CWE-668

Related Identifiers

ALSA-2021:1586

BDU:2022-02037

CESA-2021_1586

CVE-2021-1820

DSA-4797-1

DSA-4797-2

OPENSUSE-SU-2022:0182-1

OPENSUSE-SU-2022_0182-1

OPENSUSE-SU-2022_0182-2

RHSA-2021:1586

RHSA-2021_1586

RHSA-2025:10364

RLSA-2021:1586

SUSE-SU-2022:0142-1

SUSE-SU-2022:0182-1

SUSE-SU-2022:0182-2

SUSE-SU-2022:0183-1

Affected Products

Almalinux

Centos

Apple Macos

Red Hat

Rocky Linux

Suse

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 163

• 🔥❌ https://github.com/PeterMxx/ps4_8.00_vuln_poc · Exploit, Deleted
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-1820 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4797-2 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2021:1586 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-1820 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02037 · Security Note
• https://support.apple.com/en-us/HT212325 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1820 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-1820 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4797-1 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2021:1586 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0182-2 · Vendor Advisory
• https://support.apple.com/en-us/HT212323 · Vendor Advisory
• https://support.apple.com/en-us/HT212324 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2021-1586.html · Vendor Advisory