CVE-2021-4122

2022-08-2416:15:09

Alpine Linux Development Team

security.alpinelinux.org

luks header

encryption

device recovery

CVSS3

4.3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

4.9

Confidence

High

EPSS

0.001

Percentile

30.2%

JSON

It was found that a specially crafted LUKS header could trick cryptsetup into disabling encryption during the recovery of the device. An attacker with physical access to the medium, such as a flash disk, could use this flaw to force a user into permanently disabling the encryption layer of that medium.

OSVersionArchitecturePackageVersionFilename
Alpineedge-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.12-mainnoarchcryptsetup< 2.3.7-r0UNKNOWN
Alpine3.13-mainnoarchcryptsetup< 2.3.7-r0UNKNOWN
Alpine3.14-mainnoarchcryptsetup< 2.3.7-r0UNKNOWN
Alpine3.15-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.16-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.17-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.18-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.19-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN
Alpine3.20-mainnoarchcryptsetup< 2.4.3-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.12-main	noarch	cryptsetup	< 2.3.7-r0	UNKNOWN
Alpine	3.13-main	noarch	cryptsetup	< 2.3.7-r0	UNKNOWN
Alpine	3.14-main	noarch	cryptsetup	< 2.3.7-r0	UNKNOWN
Alpine	3.15-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.16-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.17-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.18-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.19-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN
Alpine	3.20-main	noarch	cryptsetup	< 2.4.3-r0	UNKNOWN