CVE-2021-23958

2021-02-2603:15:13

Alpine Linux Development Team

security.alpinelinux.org

browser

screen sharing

information leakage

firefox

CVSS2

4.3

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.002

Percentile

53.4%

JSON

The browser could have been confused into transferring a screen sharing state into another tab, which would leak unintended information. This vulnerability affects Firefox < 85.

OSVersionArchitecturePackageVersionFilename
Alpineedge-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpineedge-communitynoarchlibrewolf< 85.0-r0UNKNOWN
Alpine3.13-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.14-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.15-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.16-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.17-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.18-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.19-communitynoarchfirefox< 85.0-r0UNKNOWN
Alpine3.20-communitynoarchfirefox< 85.0-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	edge-community	noarch	librewolf	< 85.0-r0	UNKNOWN
Alpine	3.13-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.14-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.15-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.16-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.17-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.18-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.19-community	noarch	firefox	< 85.0-r0	UNKNOWN
Alpine	3.20-community	noarch	firefox	< 85.0-r0	UNKNOWN