CVE-2021-4122

low-risk
Published 2022-08-24

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.

Do I need to act?

-
0.10% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
PHYSICAL / LOW complexity

Affected Products (1)

Cryptsetup

Affected Vendors

Cryptsetup Project

References (10)

Third Party Advisory https://access.redhat.com/security/cve/CVE-2021-4122
Permissions Required https://bugzilla.redhat.com/show_bug.cgi?id=2031859
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2032401
Patch https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc...
Release Notes https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNo...
Third Party Advisory https://access.redhat.com/security/cve/CVE-2021-4122
Permissions Required https://bugzilla.redhat.com/show_bug.cgi?id=2031859
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2032401
Patch https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc...
Release Notes https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNo...
20
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal