high
7.8
CWE
362
Advisory Published
Updated
Advisory Published

CVE-2021-30995: Apple macOS fclonefileat Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability

First published: Tue Aug 24 2021(Updated: )

A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to elevate privileges.

Credit: Mickey Jin @patch1t Trend MicroMickey Jin @patch1t cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.6.2
11.6.2
tvOS<15.2
15.2
macOS Catalina
Apple iOS, iPadOS, and watchOS<8.3
8.3
macOS<12.1
12.1
macOS
Apple iOS and iPadOS<15.2
15.2
Apple iOS, iPadOS, and macOS<15.2
15.2
Apple iOS, iPadOS, and macOS<15.2
iPhone OS<15.2
Apple iOS and macOS>=10.15<10.15.7
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7-security_update_2020-001
Apple iOS and macOS=10.15.7-security_update_2021-001
Apple iOS and macOS=10.15.7-security_update_2021-002
Apple iOS and macOS=10.15.7-security_update_2021-003
Apple iOS and macOS=10.15.7-security_update_2021-004
Apple iOS and macOS=10.15.7-security_update_2021-005
Apple iOS and macOS=10.15.7-security_update_2021-006
Apple iOS and macOS=10.15.7-security_update_2021-007
Apple iOS and macOS=10.15.7-supplemental_update
macOS>=11.0<11.6.2
macOS>=12.0<12.1
tvOS<15.2
Apple iOS, iPadOS, and watchOS<8.3

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2021-30995.

  • What is the title of the vulnerability?

    The title of the vulnerability is 'Preferences. A race condition was addressed with improved state handling.'

  • What is the description of the vulnerability?

    The vulnerability involves a race condition in the Preferences feature and has been addressed with improved state handling.

  • Which software products are affected by this vulnerability?

    The following software products are affected: Apple Catalina, macOS Monterey (up to version 12.1), macOS Big Sur (up to version 11.6.2), watchOS (up to version 8.3), iOS (up to version 15.2), iPadOS (up to version 15.2), and tvOS (up to version 15.2).

  • How can I fix this vulnerability?

    To fix this vulnerability, you should update the affected software to the latest version provided by Apple.

  • What is the Common Weakness Enumeration (CWE) ID for this vulnerability?

    The Common Weakness Enumeration (CWE) ID for this vulnerability is CWE-362.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the Apple support website. Here are some references: [Link 1](https://support.apple.com/en-us/HT212980), [Link 2](https://support.apple.com/en-us/HT212978), [Link 3](https://support.apple.com/en-us/HT212975).

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