PT-2021-7972 · Apple · Macos Big Sur+2

R3Df09 + 3 · Published 2021-08-24 · Updated 2022-01-03 · CVE-2021-30969

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions macOS Big Sur versions prior to 11.6.2 macOS Catalina versions prior to Security Update 2021-008

Description A path handling issue was addressed with improved validation. This issue may cause unexpected JavaScript execution from a file on disk when processing a maliciously crafted URL. The vulnerability is related to insufficient input validation in the Help Viewer component of macOS Big Sur, which may allow an attacker to execute arbitrary JavaScript code.

Recommendations For macOS Big Sur versions prior to 11.6.2, update to macOS Big Sur 11.6.2 or later to resolve the issue. For macOS Catalina versions prior to Security Update 2021-008, apply Security Update 2021-008 to resolve the issue. As a temporary workaround, consider restricting access to maliciously crafted URLs to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2023-08037

CVE-2021-30969

Affected Products

Apple Macos

Macos Big Sur

Macos Catalina

References · 10

• https://osv.dev/vulnerability/CVE-2021-30969 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08037 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-30969 · Security Note
• https://cybersecurity-help.cz/vdb/SB2021121431 · Note
• https://t.me/cibsecurity/27834 · Telegram Post
• https://support.apple.com/en-us/102876 · Note
• https://support.apple.com/en-us/103169 · Note
• https://support.apple.com/en-us/HT212981 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30969 · Note
• https://support.apple.com/en-us/HT212979 · Note