CVE-2021-30733: Input Validation

Published 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 404), Xingwei Lin(Ant Security Light)

Affected Software

52 affected componentsFixes available
Apple macOS Big Sur<11.4
11.4
Apple tvOS<14.6
14.6
Apple Catalina
Apple Mojave
Apple WatchOS<7.5
7.5
Apple iOS<14.6
14.6
Apple iPadOS<14.6
14.6
Apple iPadOS<14.6
Apple iPhone OS<14.6
Apple iOS and macOS>=10.14.0<=10.14.5
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-security_update_2021-004
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
Apple iOS and macOS=10.15.1
Apple iOS and macOS=10.15.2
Apple iOS and macOS=10.15.3
Apple iOS and macOS=10.15.4
Apple iOS and macOS=10.15.5
Apple iOS and macOS=10.15.6
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
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-security_update_2021-003
Apple iOS and macOS=10.15.7-supplemental_update
Apple macOS>=11.0.1<11.4
Apple tvOS<14.6
Apple WatchOS<7.5

Event History

Sep 8, 2021
CVE Published
via MITRE·01:42 PM
Data Sourced
via MITRE·01:42 PM
DescriptionWeakness
Free Weekly Intel

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Frequently Asked Questions

1

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.

2

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.

3

How can CVE-2021-30733 be exploited?

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

4

What is the severity of CVE-2021-30733?

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

5

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.

Company

Resources

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