CVE-2021-30884

2021-08-2400:00:00

ubuntu.com

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

4.7 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

49.6%

JSON

The issue was resolved with additional restrictions on CSS compositing.
This issue is fixed in tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Visiting a
maliciously crafted website may reveal a user’s browsing history.

Notes

Author	Note
jdstrand	webkit receives limited support. For details, see https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchwebkit2gtk< 2.34.1-0ubuntu0.20.04.1UNKNOWN
ubuntu21.04noarchwebkit2gtk< 2.34.1-0ubuntu0.21.04.1UNKNOWN
ubuntu21.10noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN
ubuntu22.04noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN
ubuntu22.10noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN
ubuntu23.04noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN
ubuntu23.10noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN
ubuntu24.04noarchwebkit2gtk< 2.34.0-1ubuntu1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	webkit2gtk	< 2.34.1-0ubuntu0.20.04.1	UNKNOWN
ubuntu	21.04	noarch	webkit2gtk	< 2.34.1-0ubuntu0.21.04.1	UNKNOWN
ubuntu	21.10	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN
ubuntu	22.04	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN
ubuntu	22.10	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN
ubuntu	23.04	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN
ubuntu	23.10	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN
ubuntu	24.04	noarch	webkit2gtk	< 2.34.0-1ubuntu1	UNKNOWN