CVE-2021-1844: A memory corruption issue was addressed with improved validation

Description

A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3. Processing maliciously crafted web content may lead to arbitrary code execution.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)2.4% · higher than 84% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

IO

iOS · Apple

before 14.4.1 · source: NVD

MA

macOS · Apple

before 11.2.3 · source: NVD

DL

Debian Linux · Debian

10.0 · source: NVD

FE

Fedora · Fedoraproject

33 · source: NVD

SA

Safari · Apple

before 14.0.3 · source: NVD

TV

Tvos · Apple

before 14.5 · source: NVD

WA

Watchos · Apple

before 7.3.2 · source: NVD