PT-2021-2535 · Apple+8 · Safari+14

Alison Huffman + 1 · Published 2021-03-08 · Updated 2023-01-09 · CVE-2021-1844

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: iOS versions prior to 14.4.1 iPadOS versions prior to 14.4.1 Safari versions prior to 14.0.3 watchOS versions prior to 7.3.2 macOS Big Sur versions prior to 11.2.3

Description: A memory corruption issue was addressed with improved validation. Processing maliciously crafted web content may lead to arbitrary code execution. The issue is related to insufficient input validation in the WebKit module used by the Safari browser, which could allow a remote attacker to execute arbitrary code using a specially crafted malicious web page.

Recommendations: For iOS versions prior to 14.4.1, update to iOS 14.4.1 or later. For iPadOS versions prior to 14.4.1, update to iPadOS 14.4.1 or later. For Safari versions prior to 14.0.3, update to Safari 14.0.3 or later. For watchOS versions prior to 7.3.2, update to watchOS 7.3.2 or later. For macOS Big Sur versions prior to 11.2.3, update to macOS Big Sur 11.2.3 or later.

Exploit

Fix

RCE

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-20

CWE-119

CWE-787

Related Identifiers

ALSA-2021:4381

BDU:2021-01941

CESA-2021_4381

CVE-2021-1844

DSA-4923-1

MGASA-2021-0181

OPENSUSE-SU-2021:0637-1

OPENSUSE-SU-2021_0637-1

OPENSUSE-SU-2022:0182-1

OPENSUSE-SU-2022_0182-1

OPENSUSE-SU-2022_0182-2

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

SUSE-SU-2022:0142-1

SUSE-SU-2022:0182-1

SUSE-SU-2022:0182-2

SUSE-SU-2022:0183-1

USN-4939-1

Affected Products

Almalinux

Astra Linux

Centos

Linuxmint

Apple Macos

Red Hat

Rocky Linux

Safari

Suse

Ubuntu

Webkit

Ios

Ipados

Macos Big Sur

Watchos

References · 252

• 🔥❌ https://github.com/PeterMxx/ps4_8.00_vuln_poc · Exploit, Deleted
• https://osv.dev/vulnerability/ALSA-2021:4381 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4939-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-1844 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1844 · Security Note
• https://advisories.mageia.org/MGASA-2021-0181.html · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1871 · Security Note
• https://ubuntu.com/security/CVE-2021-1871 · Vendor Advisory
• https://support.apple.com/en-us/HT212223 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-4381.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1499-1 · Vendor Advisory
• https://support.apple.com/en-us/HT212221 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/663418 · Security Note
• https://debian.org/security/2021/dsa-4923 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2021:4381 · Vendor Advisory