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 MicroQi Sun Mickey Jin Trend Micro working with Trend Micro product-security@apple.com

Affected SoftwareAffected VersionHow to fix
tvOS<14.4
14.4
Apple macOS<11.2
11.2
macOS Catalina
macOS Mojave
Apple iOS, iPadOS, and watchOS<14.4
14.4
Apple iOS, iPadOS, and watchOS<14.4
14.4
Apple iOS, iPadOS, and watchOS<7.3
7.3
Apple iOS, iPadOS, and watchOS<14.4
iOS<14.4
Apple iOS and macOS>=10.14<10.14.6
Apple iOS and macOS>=10.15<10.15.7
Apple iOS and macOS=10.14.6
Apple iOS and macOS=10.14.6-security_update_2019-004
Apple iOS and macOS=10.14.6-security_update_2019-005
Apple iOS and macOS=10.14.6-security_update_2019-006
Apple iOS and macOS=10.14.6-security_update_2019-007
Apple iOS and macOS=10.14.6-security_update_2020-001
Apple iOS and macOS=10.14.6-security_update_2020-002
Apple iOS and macOS=10.14.6-security_update_2020-003
Apple iOS and macOS=10.14.6-security_update_2020-004
Apple iOS and macOS=10.14.6-security_update_2020-005
Apple iOS and macOS=10.14.6-security_update_2020-006
Apple iOS and macOS=10.14.6-security_update_2020-007
Apple iOS and macOS=10.14.6-supplemental_update
Apple iOS and macOS=10.14.6-supplemental_update_2
Apple iOS and macOS=10.15.7
Apple iOS and macOS=10.15.7-supplemental_update
Apple iOS and macOS>=11.0<11.2
tvOS<14.4
Apple iOS, iPadOS, and watchOS<7.3

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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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