PT-2021-18848 · Apple · Macos Mojave+6

Hjy79425575 · Published 2021-07-21 · Updated 2021-09-14 · CVE-2021-30759

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 iOS versions prior to 14.7 macOS Big Sur versions prior to 11.5 watchOS versions prior to 7.6 tvOS versions prior to 14.7 macOS Mojave versions prior to Security Update 2021-005 macOS Catalina versions prior to Security Update 2021-004

Description A stack overflow issue was addressed with improved input validation. Processing a maliciously crafted font file may lead to arbitrary code execution.

Recommendations For iOS versions prior to 14.7, update to iOS 14.7 or later. For macOS Big Sur versions prior to 11.5, update to macOS Big Sur 11.5 or later. For watchOS versions prior to 7.6, update to watchOS 7.6 or later. For tvOS versions prior to 14.7, update to tvOS 14.7 or later. For macOS Mojave versions prior to Security Update 2021-005, apply Security Update 2021-005 or later. For macOS Catalina versions prior to Security Update 2021-004, apply Security Update 2021-004 or later.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-30759

ZDI-21-941

Affected Products

Apple Macos

Ios

Macos Big Sur

Macos Catalina

Macos Mojave

Tvos

Watchos

References · 12

• https://support.apple.com/en-us/HT212603 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-30759 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-941 · Security Note
• https://support.apple.com/en-us/HT212601 · Vendor Advisory
• https://support.apple.com/en-us/HT212605 · Vendor Advisory
• https://support.apple.com/en-us/HT212600 · Vendor Advisory
• https://support.apple.com/en-us/HT212604 · Vendor Advisory
• https://support.apple.com/en-us/HT212602 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30759 · Security Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30759 · Note
• https://t.me/cibsecurity/28493 · Telegram Post
• https://support.apple.com/en-us/102849 · Note