high
7.8
CWE
787 20
Advisory Published
CVE Published
Updated

CVE-2020-27952: Input Validation

First published: Thu 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.

Credit: product-security@apple.com an anonymous researcher Mickey Jin Junzhi Lu Trend Microan anonymous researcher Mickey Jin Junzhi Lu Trend Micro

Affected SoftwareAffected VersionHow to fix
Apple macOS Big Sur<11.0.1
11.0.1
Apple macOS Big Sur<11.1
11.1
Apple Catalina
Apple Mojave
Apple Mac OS X>=10.14<10.14.6
Apple Mac OS X>=10.15<10.15.7
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_2019-006
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-supplemental_update
Apple Mac OS X=10.14.6-supplemental_update_2
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.1.0

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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-2020-27952?

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

  • 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.

  • Is Apple Catalina affected by CVE-2020-27952?

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

  • Is Apple Mojave affected by CVE-2020-27952?

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

  • How can CVE-2020-27952 be fixed?

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

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