high
7.1
CWE
20 125
Advisory Published
CVE Published
Updated

CVE-2021-1791: Input Validation

First published: Tue Jan 26 2021(Updated: )

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to disclose kernel memory.

Credit: Junzhi Lu @pwn0rz Qi Sun Mickey Jin Trend Micro working with Trend MicroJunzhi Lu @pwn0rz Qi Sun & Mickey Jin Trend Micro working with Trend MicroJunzhi Lu @pwn0rz Qi Sun Mickey Jin Trend Micro working with Trend MicroJunzhi Lu @pwn0rz Qi Sun Mickey Jin Trend Micro working with Trend Micro product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple iPadOS<14.4
Apple iPhone OS<14.4
Apple Mac OS X>=10.14<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_2019-004
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-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-supplemental_update
Apple macOS>=11.0<11.2
Apple tvOS<14.4
Apple watchOS<7.3
Apple tvOS<14.4
14.4
Apple watchOS<7.3
7.3
Apple iOS<14.4
14.4
Apple iPadOS<14.4
14.4
Apple macOS Big Sur<11.2
11.2
Apple Catalina
Apple Mojave

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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-2021-1791?

    CVE-2021-1791 is a vulnerability that allows an attacker to read kernel memory through an out-of-bounds read issue.

  • What is the severity of CVE-2021-1791?

    The severity of CVE-2021-1791 is not specified in the given information.

  • Which software versions are affected by CVE-2021-1791?

    macOS Big Sur version 11.2, watchOS version up to 7.3, iOS version up to 14.4, iPadOS version up to 14.4, and tvOS version up to 14.4 are affected by CVE-2021-1791.

  • How can I fix CVE-2021-1791?

    You can fix CVE-2021-1791 by updating your software to the latest available version provided by Apple.

  • Where can I find more information about CVE-2021-1791?

    You can find more information about CVE-2021-1791 on the Apple support website.

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