medium
5.5
CWE
20 125
Advisory Published
CVE Published
Updated

CVE-2021-30733: Input Validation

First published: Mon May 24 2021(Updated: )

An out-of-bounds read was addressed with improved input validation. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted font may result in the disclosure of process memory.

Credit: Sunglin the Knownsec 404Xingwei Lin Ant Security LightSunglin the Knownsec 404Xingwei Lin Ant Security LightXingwei Lin Ant Security LightSunglin the Knownsec 404Xingwei Lin Ant Security LightSunglin the Knownsec 404Sunglin the Knownsec 404Sunglin the Knownsec 404 product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple iOS<14.6
14.6
Apple iPadOS<14.6
14.6
Apple macOS Big Sur<11.4
11.4
Apple tvOS<14.6
14.6
Apple Catalina
Apple Mojave
Apple iPadOS<14.6
Apple iPhone OS<14.6
Apple Mac OS X>=10.14.0<=10.14.5
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
Apple Mac OS X=10.15.1
Apple Mac OS X=10.15.2
Apple Mac OS X=10.15.3
Apple Mac OS X=10.15.4
Apple Mac OS X=10.15.5
Apple Mac OS X=10.15.6
Apple Mac OS X=10.15.6
Apple Mac OS X=10.15.6-supplemental_update
Apple Mac OS X=10.15.7
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>=11.0.1<11.4
Apple tvOS<14.6
Apple watchOS<7.5

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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-2021-30733?

    CVE-2021-30733 is a vulnerability in CoreText that allows for an out-of-bounds read and may result in the disclosure of process memory.

  • Who is affected by CVE-2021-30733?

    Users of Apple Mojave, Apple tvOS up to version 14.6, Apple watchOS up to version 7.5, Apple macOS Big Sur up to version 11.4, Apple Catalina, Apple iOS up to version 14.6, and Apple iPadOS up to version 14.6 are affected by CVE-2021-30733.

  • How can CVE-2021-30733 be exploited?

    CVE-2021-30733 can be exploited by processing a maliciously crafted font.

  • What is the severity of CVE-2021-30733?

    The severity of CVE-2021-30733 is not mentioned in the provided information.

  • How can I fix CVE-2021-30733?

    To fix CVE-2021-30733, update to the latest version of the affected software from Apple's official website.

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