CVE-2021-4122

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.

Score

CVSS 3.1 4.3 Medium

Status

Modified - secalert@redhat.com

Published

2022-08-24

Last modified

2026-10-14

Weaknesses

CWE-345

Affected products

• Cryptsetup (Cryptsetup Project)
• Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
• Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
• Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2031859
• https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes
• https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c
• https://bugzilla.redhat.com/show_bug.cgi?id=2032401
• https://access.redhat.com/security/cve/CVE-2021-4122
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html