medium
5.5
CWE
125
Advisory Published
CVE Published
Updated

CVE-2021-30791

First published: Wed Jul 21 2021(Updated: )

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. Processing a maliciously crafted file may disclose user information.

Credit: Anonymous Trend Micro Zero Day InitiativeAnonymous Trend Micro Zero Day InitiativeAnonymous Trend Micro Zero Day Initiative product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS Big Sur<11.5
11.5
Apple Mojave
Apple Catalina
Apple iPadOS<14.7
Apple iPhone OS<14.7
Apple Mac OS X>=10.14.0<10.14.6
Apple Mac OS X>=10.15<10.15.7
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6-security_update_2019-001
Apple Mac OS X=10.14.6-security_update_2019-002
Apple Mac OS X=10.14.6-security_update_2019-004
Apple Mac OS X=10.14.6-security_update_2019-005
Apple Mac OS X=10.14.6-security_update_2019-006
Apple Mac OS X=10.14.6-security_update_2019-007
Apple Mac OS X=10.14.6-security_update_2020-001
Apple Mac OS X=10.14.6-security_update_2020-002
Apple Mac OS X=10.14.6-security_update_2020-003
Apple Mac OS X=10.14.6-security_update_2020-004
Apple Mac OS X=10.14.6-security_update_2020-005
Apple Mac OS X=10.14.6-security_update_2020-006
Apple Mac OS X=10.14.6-security_update_2020-007
Apple Mac OS X=10.14.6-security_update_2021-001
Apple Mac OS X=10.14.6-security_update_2021-002
Apple Mac OS X=10.14.6-security_update_2021-003
Apple Mac OS X=10.14.6-security_update_2021-004
Apple Mac OS X=10.14.6-supplemental_update
Apple Mac OS X=10.14.6-supplemental_update_2
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-supplemental_update
Apple macOS<11.5

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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-2021-30791?

    CVE-2021-30791 is a vulnerability in Apple's Model I/O that allowed an out-of-bounds read, which has been fixed by implementing improved bounds checking.

  • Which software versions are affected by CVE-2021-30791?

    CVE-2021-30791 affects Apple Mojave, Apple Catalina, and Apple macOS Big Sur up to version 11.5.

  • How can I fix CVE-2021-30791?

    To fix CVE-2021-30791, you should update your affected Apple software to the latest version available.

  • Where can I find more information about CVE-2021-30791?

    You can find more information about CVE-2021-30791 on Apple's official support page: [https://support.apple.com/en-us/HT212600](https://support.apple.com/en-us/HT212600)

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