// For flags

CVE-2020-27921

Apple Security Advisory 2020-12-14-3

Severity Score

7.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1. An application may be able to execute arbitrary code with kernel privileges.

Se abordó una condición de carrera con un manejo del estado mejorado. Este problema es corregido en macOS Big Sur versión 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur versión 11.0.1. Una aplicación puede ser capaz de ejecutar código arbitrario con privilegios de kernel.

macOS Big Sur 11.1, Security Update 2020-001 Catalina, and Security Update 2020-007 Mojave address buffer overflow, bypass, code execution, denial of service, information leakage, integer overflow, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-10-27 CVE Reserved
  • 2020-12-16 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
References (2)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://support.apple.com/en-us/HT211931 2021-04-06
https://support.apple.com/en-us/HT212011 2021-04-06
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 < 11.0.1
Search vendor "Apple" for product "Mac Os X" and version " < 11.0.1"
-
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 < 11.1.0
Search vendor "Apple" for product "Mac Os X" and version " < 11.1.0"
-
Affected