PT-2021-5373 · Apple+9 · Ipados+16

S0Rrymybad · Published 2021-02-01 · Updated 2025-10-23 · CVE-2021-1789

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Safari versions prior to 14.0.3 macOS Big Sur versions prior to 11.2 Security Update versions prior to 2021-001 Catalina Security Update versions prior to 2021-001 Mojave tvOS versions prior to 14.4 watchOS versions prior to 7.3 iOS versions prior to 14.4 iPadOS versions prior to 14.4

Description The issue is related to a type confusion problem in the WebKitGTK and WPE WebKit modules, which can be exploited by a remote attacker to execute arbitrary code. Processing maliciously crafted web content may lead to arbitrary code execution.

Recommendations For Safari versions prior to 14.0.3, update to Safari 14.0.3 or later. For macOS Big Sur versions prior to 11.2, update to macOS Big Sur 11.2 or later. For Security Update versions prior to 2021-001 Catalina, apply Security Update 2021-001 Catalina or later. For Security Update versions prior to 2021-001 Mojave, apply Security Update 2021-001 Mojave or later. For tvOS versions prior to 14.4, update to tvOS 14.4 or later. For watchOS versions prior to 7.3, update to watchOS 7.3 or later. For iOS versions prior to 14.4, update to iOS 14.4 or later. For iPadOS versions prior to 14.4, update to iPadOS 14.4 or later.

Fix

RCE

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

ALSA-2021:4381

ALT-PU-2021-1527

BDU:2021-06208

CESA-2021_4381

CVE-2021-1789

DSA-4877-1

MGASA-2021-0181

OPENSUSE-SU-2021:0637-1

OPENSUSE-SU-2021_0637-1

OPENSUSE-SU-2024:11506-1

RHSA-2021:4381

RHSA-2021_4381

RHSA-2025:10364

RLSA-2021:4381

SUSE-SU-2021:1430-1

SUSE-SU-2021:1499-1

SUSE-SU-2021:1990-1

USN-4894-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linuxmint

Apple Macos

Red Hat

Rocky Linux

Safari

Security Update

Suse

Ubuntu

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 308

• https://ubuntu.com/security/CVE-2021-1799 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-1801 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/EQ3U3VBSOJB46WCO66TEWE5OAXLTU3YW · Vendor Advisory
• https://support.apple.com/en-us/HT212147 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-1789 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-1765 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0637-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4894-1 · 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://support.apple.com/en-us/HT212152 · Vendor Advisory
• https://support.apple.com/en-us/HT212146 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-1870 · Vendor Advisory