PT-2021-13606 · Apple · Appleintelkblgraphics+1

Published 2021-04-26 · Updated 2021-09-15 · CVE-2021-1834

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: macOS versions prior to 11.3 Security Update 2021-002 Catalina Security Update 2021-003 Mojave

Description: An out-of-bounds write issue was addressed with improved bounds checking, allowing a malicious application to potentially execute arbitrary code with kernel privileges. The issue is related to the AppleIntelKBLGraphics IOCTL.

Recommendations: For macOS versions prior to 11.3, update to macOS Big Sur 11.3. For Catalina, apply Security Update 2021-002. For Mojave, apply Security Update 2021-003.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-1834

ZDI-21-595

ZDI-21-596

Affected Products

Appleintelkblgraphics

Apple Macos

References · 9

• https://support.apple.com/en-us/HT212326 · Vendor Advisory
• https://support.apple.com/en-us/HT212325 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-595 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1834 · Vendor Advisory
• https://support.apple.com/en-us/HT212327 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-596 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1834 · Security Note
• https://support.apple.com/en-us/103126 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1834 · Note