PT-2021-13565 · Apple · Ipados+6

Ivan Fratric · Published 2021-02-01 · Updated 2021-04-09 · CVE-2021-1776

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/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 11.2 Security Update versions prior to 2021-001 Catalina Security Update versions prior to 2021-001 Mojave watchOS versions prior to 7.3 tvOS versions prior to 14.4 iOS versions prior to 14.4 iPadOS versions prior to 14.4

Description: An out-of-bounds write issue was addressed with improved bounds checking. Processing a maliciously crafted font file may lead to arbitrary code execution.

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

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-1776

Affected Products

Apple Macos

Security Update

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 9

• https://osv.dev/vulnerability/CVE-2021-1776 · Vendor Advisory
• https://support.apple.com/en-us/HT212148 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1776 · Security Note
• https://support.apple.com/en-us/HT212147 · Vendor Advisory
• https://support.apple.com/en-us/HT212149 · Vendor Advisory
• https://support.apple.com/en-us/HT212146 · Vendor Advisory
• https://support.apple.com/en-us/103124 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1776 · Note
• https://t.me/cybersecuritytechnologies/2916 · Telegram Post