CVE-2021-30937: High severity Apple macOS Big Sur vulnerability

Published Aug 24, 2021
·
Updated

A memory corruption vulnerability was addressed with improved locking. 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 execute arbitrary code with kernel privileges.

Other sources

Kernel. A memory corruption vulnerability was addressed with improved locking.

Credit

Sergei Glazunov(Google Project Zero)

Affected Software

23 affected componentsFixes available
Apple macOS Big Sur<11.6.2
11.6.2
Apple tvOS<15.2
15.2
Apple Catalina
Apple WatchOS<8.3
8.3
Apple macOS Monterey<12.1
12.1
Apple iOS<15.2
15.2
Apple iPadOS<15.2
15.2
Apple iPadOS<15.2
Apple iPhone OS<15.2
Apple iOS and macOS>=10.15<=10.15.7
Apple iOS and macOS=10.15.7-security_update_2020
Apple iOS and macOS=10.15.7-security_update_2020-001
Apple iOS and macOS=10.15.7-security_update_2020-005
Apple iOS and macOS=10.15.7-security_update_2020-007
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_2021-006
Apple iOS and macOS=10.15.7-security_update_2021-007
Apple macOS>=11.0<11.6.2
Apple macOS>=12.0<12.1
Apple tvOS<15.2
Apple WatchOS<8.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Apple macOS to a version that resolves this vulnerability.

    Fixed in 11.6.2
  2. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 15.2
  3. Upgrade

    Upgrade Apple iOS, iPadOS, and watchOS to a version that resolves this vulnerability.

    Fixed in 8.3
  4. Upgrade

    Upgrade macOS to a version that resolves this vulnerability.

    Fixed in 12.1
  5. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 15.2
  6. Upgrade

    Upgrade Apple iOS, iPadOS, and macOS to a version that resolves this vulnerability.

    Fixed in 15.2
  7. Upgrade

    Upgrade macOS Big Sur to a version that resolves this vulnerability.

    Fixed in 11.6.2
  8. Upgrade

    Upgrade macOS Monterey to a version that resolves this vulnerability.

    Fixed in 12.1
  9. Upgrade

    Upgrade macOS Catalina to a version that resolves this vulnerability.

    Patch Security Update 2021-008 Catalina
  10. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 15.2
  11. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 15.2
  12. Upgrade

    Upgrade watchOS to a version that resolves this vulnerability.

    Fixed in 8.3

Event History

Aug 24, 2021
CVE Published
via MITRE·06:50 PM
Data Sourced
via MITRE·06:50 PM
DescriptionWeakness
Event
07:15 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the vulnerability ID?

The vulnerability ID is CVE-2021-30937.

2

What is the severity of CVE-2021-30937?

The severity of CVE-2021-30937 is not mentioned in the description.

3

What software versions are affected by CVE-2021-30937?

The vulnerability affects macOS Big Sur 11.6.2, macOS Monterey 12.1, Apple Catalina, iOS up to 15.2, iPadOS up to 15.2, watchOS up to 8.3, and tvOS up to 15.2.

4

How was CVE-2021-30937 addressed?

The vulnerability was addressed with improved locking.

5

Where can I find more information about CVE-2021-30937?

More information about CVE-2021-30937 can be found at the following references: [link1](https://support.apple.com/en-us/HT212978), [link2](https://support.apple.com/en-us/HT212980), [link3](https://support.apple.com/en-us/HT212979).

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