high
7.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2020-27918: Use After Free

First published: Thu Nov 05 2020(Updated: )

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, Safari 14.0.1, tvOS 14.2, iTunes 12.11 for Windows. Processing maliciously crafted web content may lead to arbitrary code execution.

Credit: Liu Long Ant Security Lightan anonymous researcher cc Trend Micro Zero Day InitiativeMarcin 'Icewall' Noga Cisco Talos product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS<11.0.1
11.0.1
tvOS<14.2
14.2
Apple Mobile Safari<14.0.1
14.0.1
Apple iOS, iPadOS, and watchOS<14.2
14.2
Apple iOS, iPadOS, and watchOS<14.2
14.2
Apple iOS, iPadOS, and watchOS<7.1
7.1
Apple iCloud<11.5
11.5
Apple iTunes<12.11
12.11
Apple iCloud for Windows<11.5
Apple iTunes for Windows<12.11
Apple Mobile Safari<14.0.1
Apple iOS, iPadOS, and watchOS<14.2
iOS<14.2
Apple iOS and macOS<11.0.1
tvOS<14.2
Apple iOS, iPadOS, and watchOS<7.1
Fedora=32
Fedora=33
Fedora=34
Debian=10.0
WebKitGTK+<2.30.6

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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-2020-27918?

    CVE-2020-27918 is a use after free vulnerability in WebKit.

  • How does CVE-2020-27918 impact Apple iCloud for Windows?

    Apple iCloud for Windows version 11.5 is affected by CVE-2020-27918.

  • Is Apple iTunes for Windows affected by CVE-2020-27918?

    Yes, Apple iTunes for Windows version up to 12.11 is affected by CVE-2020-27918.

  • What is the severity of CVE-2020-27918?

    The severity of CVE-2020-27918 is not specified in the vulnerability report.

  • How can I fix CVE-2020-27918?

    To fix CVE-2020-27918, update to the latest version of the affected software as per the vendor's instructions.

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