high
7.8
CWE
20 787
Advisory Published
CVE Published
Updated
Advisory Published

CVE-2021-1772: Apple macOS CoreText TTF Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

First published: Tue Jan 26 2021(Updated: )

A stack overflow was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. Processing a maliciously crafted text file may lead to arbitrary code execution.

Credit: Mickey Jin @patch1t Trend Micro working with Trend MicroMickey Jin Trend Micro working with Trend Micro product-security@apple.com

Affected SoftwareAffected VersionHow to fix
tvOS<14.4
14.4
Apple macOS<11.2
11.2
macOS Catalina
macOS Mojave
Apple iOS, iPadOS, and watchOS<14.4
iOS<14.4
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_2019-004
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-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 iOS and macOS>=11.0<11.2
tvOS<14.4
Apple iOS, iPadOS, and watchOS<7.3
Apple iOS and macOS
Apple iOS, iPadOS, and watchOS<14.4
14.4
Apple iOS, iPadOS, and watchOS<14.4
14.4
Apple iOS, iPadOS, and watchOS<7.3
7.3

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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 the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-1772.

  • What is the title of this vulnerability?

    The title of this vulnerability is CoreText. A stack overflow was addressed with improved input validation.

  • What software versions are affected by this vulnerability?

    macOS Big Sur 11.2, Apple Catalina, Apple Mojave, Apple watchOS up to 7.3, Apple iOS up to 14.4, Apple iPadOS up to 14.4, Apple tvOS up to 14.4 are affected by this vulnerability.

  • What is the severity of this vulnerability?

    The severity of this vulnerability is not mentioned in the provided information.

  • How can this vulnerability be fixed?

    This vulnerability can be fixed by updating the affected software to the recommended versions mentioned in the remediation links provided by Apple.

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