PT-2021-18870 · Apple · Apple Macos+3

3Ndy1 + 2 · Published 2021-07-21 · Updated 2021-09-15 · CVE-2021-30787

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 versions prior to 11.5 Security Update versions prior to 2021-004 on Catalina Security Update versions prior to 2021-005 on Mojave

Description The issue allows an application to potentially cause unexpected system termination or write kernel memory due to an out-of-bounds write privilege escalation. This could be exploited through the process token BindQueryStoreRegisterToMemoryList function.

Recommendations For macOS versions prior to 11.5, update to macOS Big Sur 11.5. For Catalina, apply Security Update 2021-004. For Mojave, apply Security Update 2021-005.

Fix

Related Identifiers

CVE-2021-30787

ZDI-21-944

Affected Products

Big Sur

Catalina

Apple Macos

Mojave

References · 8

• https://support.apple.com/en-us/HT212603 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30787 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-944 · Security Note
• https://support.apple.com/en-us/HT212600 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-30787 · Vendor Advisory
• https://support.apple.com/en-us/HT212602 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30787 · Note
• https://support.apple.com/en-us/102849 · Note