CVE-2020-27952: Input Validation

Published Nov 12, 2020
·
Updated

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1. Processing a maliciously crafted font file may lead to arbitrary code execution.

Other sources

FontParser. An out-of-bounds write was addressed with improved input validation.

Credit

an anonymous researcher, Mickey Jin, Junzhi Lu(Trend Micro)

Affected Software

22 affected componentsFixes available
Apple macOS Big Sur<11.0.1
11.0.1
Apple macOS Big Sur<11.1
11.1
Apple Catalina
Apple Mojave
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_2019-001
Apple iOS and macOS=10.14.6-security_update_2019-002
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-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 macOS>=11.0<11.1.0

Event History

Apr 2, 2021
CVE Published
via MITRE·05:39 PM
Data Sourced
via MITRE·05:39 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is CVE-2020-27952?

CVE-2020-27952 is a vulnerability in FontParser that allows for an out-of-bounds write due to improved input validation.

2

Is macOS Big Sur affected by CVE-2020-27952?

Yes, macOS Big Sur versions up to and including 11.1 are affected by CVE-2020-27952.

3

Is Apple Catalina affected by CVE-2020-27952?

No, Apple Catalina is not affected by CVE-2020-27952.

4

Is Apple Mojave affected by CVE-2020-27952?

Yes, Apple Mojave is affected by CVE-2020-27952.

5

How can CVE-2020-27952 be fixed?

CVE-2020-27952 can be fixed by updating macOS Big Sur to version 11.2 or later.

Company

Resources

Contact

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