PT-2021-6016 · Apple · Watchos+7

Published 2021-04-26 · Updated 2021-09-16 · CVE-2021-1875

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 14.5 iPadOS versions prior to 14.5 tvOS versions prior to 14.5 watchOS versions prior to 7.4 macOS Big Sur versions prior to 11.3 macOS Catalina versions prior to Security Update 2021-002 macOS Mojave versions prior to Security Update 2021-003

Description The issue is related to a double free problem in the libxslt library, which can be exploited by processing a maliciously crafted file, potentially leading to heap corruption and allowing an attacker to execute arbitrary code on the target system.

Recommendations For iOS versions prior to 14.5, update to iOS 14.5 or later. For iPadOS versions prior to 14.5, update to iPadOS 14.5 or later. For tvOS versions prior to 14.5, update to tvOS 14.5 or later. For watchOS versions prior to 7.4, update to watchOS 7.4 or later. For macOS Big Sur versions prior to 11.3, update to macOS Big Sur 11.3 or later. For macOS Catalina versions prior to Security Update 2021-002, apply Security Update 2021-002 or later. For macOS Mojave versions prior to Security Update 2021-003, apply Security Update 2021-003 or later.

Fix

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BDU:2022-00578

CVE-2021-1875

Affected Products

Apple Macos

Ios

Ipados

Macos Big Sur

Macos Catalina

Macos Mojave

Tvos

Watchos

References · 13

• https://support.apple.com/en-us/HT212325 · Vendor Advisory
• https://support.apple.com/en-us/HT212323 · Vendor Advisory
• https://support.apple.com/en-us/HT212324 · Vendor Advisory
• https://support.apple.com/en-us/HT212326 · Vendor Advisory
• https://support.apple.com/en-us/HT212317 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1875 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-00578 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1875 · Security Note
• https://support.apple.com/en-us/HT212327 · Vendor Advisory
• https://t.me/cvenotify/21020 · Telegram Post
• https://support.apple.com/en-us/103126 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1875 · Note
• https://cybersecurity-help.cz/vdb/SB2021042704 · Note