CVE-2020-27918

Published: Dec 8, 2020Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (13)

Products: Apple: Icloud, Ipados, Iphone Os, Itunes, Macos, Safari, Tvos, Watchos · Fedoraproject: Fedora · Debian: Debian Linux · +1 more

Show all products

Apple: Icloud, Ipados, Iphone Os, Itunes, Macos, Safari, Tvos, Watchos · Fedoraproject: Fedora · Debian: Debian Linux · Webkitgtk: Webkitgtk+

8 products

1 product

1 product

1 product

Configuration A

8 vulnerable

Vulnerable Software	Affected Versions
Apple Icloud	Before 11.5
Apple Ipados	Before 14.2
Apple Iphone Os	Before 14.2
Apple Itunes	Before 12.11
Apple Macos	Before 11.0.1
Apple Safari	Before 14.0.1
Apple Tvos	Before 14.2
Apple Watchos	Before 7.1

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33
Fedoraproject Fedora	Version 34

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0

Configuration D

1 vulnerable

Vulnerable Software	Affected Versions
Webkitgtk Webkitgtk+	Before 2.30.6

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (28)

http://seclists.org/fulldisclosure/2020/Dec/32

Source: product-security@apple.com

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/03/22/1

Source: product-security@apple.com

Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EQ3U3VBSOJB46WCO66TEWE5OAXLTU3YW/

Source: product-security@apple.com

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/

Source: product-security@apple.com

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/

Source: product-security@apple.com

https://security.gentoo.org/glsa/202104-03

Source: product-security@apple.com

Third Party Advisory

https://support.apple.com/en-us/HT211928

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211929

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211930

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211931

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211933

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211934

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT211935

Source: product-security@apple.com

Vendor Advisory

https://www.debian.org/security/2021/dsa-4877

Source: product-security@apple.com

Third Party Advisory

http://seclists.org/fulldisclosure/2020/Dec/32

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/03/22/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EQ3U3VBSOJB46WCO66TEWE5OAXLTU3YW/

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/

Source: af854a3a-2127-422b-91ae-364da2661108

https://security.gentoo.org/glsa/202104-03

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://support.apple.com/en-us/HT211928

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211929

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211930

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211931

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211933

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211934

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT211935

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.debian.org/security/2021/dsa-4877

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

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