CVE-2021-30877: High severity apple macos vulnerability

Published Aug 24, 2021
·
Updated

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. Processing a maliciously crafted AppleScript binary may result in unexpected application termination or disclosure of process memory.

Other sources

AppleScript. An out-of-bounds read was addressed with improved bounds checking.

Credit

Jeremy Brown, hjy79425575

Affected Software

18 affected componentsFixes available
Apple macOS Big Sur<11.6.1
11.6.1
Apple Catalina
Apple macOS Monterey<12.0.1
12.0.1
Apple iOS and macOS>=10.15<=10.15.6
Apple iOS and macOS=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_2021-004
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-supplemental_update
Apple macOS>=11.0<11.6.1
Apple macOS>=12.0<12.0.1

Remediation

Patch Available

https://support.apple.com/en-us/HT212869

Patch Available

https://support.apple.com/en-us/HT212871

Patch Available

https://support.apple.com/en-us/HT212872

Event History

Aug 24, 2021
CVE Published
via MITRE·06:49 PM
Data Sourced
via MITRE·06:49 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is CVE-2021-30877?

CVE-2021-30877 is a vulnerability in AppleScript that allows an out-of-bounds read. It has been addressed with improved bounds checking.

2

What is the severity of CVE-2021-30877?

The severity of CVE-2021-30877 is not specified.

3

Which software versions are affected by CVE-2021-30877?

macOS Big Sur versions up to and excluding 11.6.1, Apple Catalina, and macOS Monterey versions up to and excluding 12.0.1 are affected by CVE-2021-30877.

4

How can I fix CVE-2021-30877?

To fix CVE-2021-30877, update your macOS Big Sur to version 11.6.1, or update your macOS Monterey to version 12.0.1.

5

Where can I find more information about CVE-2021-30877?

You can find more information about CVE-2021-30877 on the Apple support website at [https://support.apple.com/en-us/HT212871](https://support.apple.com/en-us/HT212871), [https://support.apple.com/en-us/HT212872](https://support.apple.com/en-us/HT212872), and [https://support.apple.com/en-us/HT212869](https://support.apple.com/en-us/HT212869).

Company

Resources

Contact

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