CVE-2021-4122 — MEDIUM (4.3)

Q: How severe is CVE-2021-4122?

CVE-2021-4122 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-4122?

Check the references section above for vendor advisories and patch information. Affected products include: Cryptsetup Project Cryptsetup.

Vulnerability Description

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.

CVSS Score

4.3

MEDIUM

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

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Cryptsetup Project	Cryptsetup	< 2.3.7

Related Weaknesses (CWE)

CWE-345

References

https://access.redhat.com/security/cve/CVE-2021-4122Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2031859Permissions RequiredThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2032401Issue TrackingThird Party Advisory
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfcPatchThird Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNoRelease NotesVendor Advisory
https://access.redhat.com/security/cve/CVE-2021-4122Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2031859Permissions RequiredThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2032401Issue TrackingThird Party Advisory
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfcPatchThird Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNoRelease NotesVendor Advisory

FAQ

What is CVE-2021-4122?

CVE-2021-4122 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 di...

How severe is CVE-2021-4122?

CVE-2021-4122 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-4122?

Check the references section above for vendor advisories and patch information. Affected products include: Cryptsetup Project Cryptsetup.