medium
5.5
CWE
787
Advisory Published
CVE Published
Updated

CVE-2021-1883

First published: Mon Apr 26 2021(Updated: )

Heimdal. This issue was addressed with improved checks.

Credit: Gabe Kirkpatrick @gabe_k product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.3
11.3
tvOS<14.5
14.5
macOS Catalina
macOS Mojave
Apple iOS, iPadOS, and watchOS<14.5
14.5
Apple iOS, iPadOS, and watchOS<14.5
14.5
Apple iOS, iPadOS, and watchOS<7.4
7.4
Apple iOS, iPadOS, and watchOS<14.5
iOS<14.5
Apple iOS and macOS>=10.14<=10.14.5
Apple iOS and macOS>=10.15<=10.15.5
Apple iOS and macOS=10.14.6
Apple iOS and macOS=10.14.6-security_update_2019-001
Apple iOS and macOS=10.14.6-security_update_2019-002
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-security_update_2021-001
Apple iOS and macOS=10.14.6-security_update_2021-002
Apple iOS and macOS=10.14.6-security_update_2021-003
Apple iOS and macOS=10.14.6-supplemental_update
Apple iOS and macOS=10.14.6-supplemental_update_2
Apple iOS and macOS=10.15.6
Apple iOS and macOS=10.15.6-supplemental_update
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-supplemental_update
Apple iOS and macOS>=11.0<11.3
tvOS<14.5
Apple iOS, iPadOS, and watchOS<7.4

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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-2021-1883?

    CVE-2021-1883 is a vulnerability in Heimdal that has been addressed with improved checks.

  • Which software versions are affected by CVE-2021-1883?

    CVE-2021-1883 affects Apple iOS up to exclusive version 14.5, Apple iPadOS up to exclusive version 14.5, Apple watchOS up to exclusive version 7.4, Apple macOS Big Sur up to exclusive version 11.3, Apple Catalina, Apple tvOS up to exclusive version 14.5, and Apple Mojave.

  • How can I fix CVE-2021-1883?

    To fix CVE-2021-1883, update your Apple devices to the recommended software versions: iOS 14.5, iPadOS 14.5, watchOS 7.4, macOS Big Sur 11.3, tvOS 14.5.

  • Where can I find more information about CVE-2021-1883?

    You can find more information about CVE-2021-1883 on the Apple support page: [link](https://support.apple.com/en-us/HT212530).

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