high
7.1
CWE
125
Advisory Published
Updated

CVE-2021-30877

First published: Tue 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.

Credit: Jeremy Brown hjy79425575 Jeremy Brown hjy79425575 Jeremy Brown Jeremy Brown Jeremy Brown hjy79425575 Jeremy Brown hjy79425575 Jeremy Brown Jeremy Brown cve@mitre.org Jeremy Brown hjy79425575 Jeremy Brown hjy79425575 Jeremy Brown Jeremy Brown

Affected SoftwareAffected VersionHow to fix
Apple Mac OS X>=10.15<=10.15.6
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-security_update_2020-005
Apple Mac OS X=10.15.7-security_update_2020-007
Apple Mac OS X=10.15.7-security_update_2021-001
Apple Mac OS X=10.15.7-security_update_2021-002
Apple Mac OS X=10.15.7-security_update_2021-003
Apple Mac OS X=10.15.7-security_update_2021-004
Apple Mac OS X=10.15.7-security_update_2021-005
Apple Mac OS X=10.15.7-security_update_2021-006
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.6.1
Apple macOS>=12.0<12.0.1
Apple macOS Big Sur<11.6.1
11.6.1

Remedy

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

Remedy

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

Remedy

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

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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 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.

  • What is the severity of CVE-2021-30877?

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

  • 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.

  • 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.

  • 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).

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