high
8.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2021-1788: Use After Free

First published: Tue Jan 26 2021(Updated: )

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Credit: Francisco Alonso @revskills Francisco Alonso @revskills Francisco Alonso @revskills Francisco Alonso @revskills Francisco Alonso @revskills product-security@apple.com

Affected SoftwareAffected VersionHow to fix
debian/webkit2gtk
2.36.4-1~deb10u1
2.38.6-0+deb10u1
2.40.5-1~deb11u1
2.42.1-1~deb11u2
2.40.5-1~deb12u1
2.42.1-1~deb12u1
2.42.1-2
debian/wpewebkit
2.38.6-1~deb11u1
2.38.6-1
2.42.1-1
tvOS<14.4
14.4
Apple macOS<11.2
11.2
macOS Catalina
macOS Mojave
Apple Mobile Safari<14.0.3
14.0.3
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
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
Apple Mobile Safari<14.0.3
tvOS<14.4
Apple iOS, iPadOS, and watchOS<7.3
Debian=10.0
Fedora=33

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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?

    The vulnerability ID is CVE-2021-1788.

  • What is the affected software?

    The affected software includes Apple Safari, macOS Big Sur, Catalina, Mojave, watchOS, iOS, iPadOS, and tvOS.

  • What is the severity of CVE-2021-1788?

    The severity of CVE-2021-1788 is not specified.

  • How can I fix CVE-2021-1788?

    To fix CVE-2021-1788, update to the latest versions of the affected software as recommended by Apple.

  • Where can I find more information about CVE-2021-1788?

    You can find more information about CVE-2021-1788 on Apple's official support website.

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