CVE-2021-4122

Related Vulnerabilities: 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.

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.

Statement

Red Hat Enterprise Linux version 7 and older are not affected since they do not support online reencryption.

Red Hat Enterprise Linux version 7 and older are not affected since they do not support online reencryption.

Additional Information

  • Bugzilla 2032401: CVE-2021-4122 cryptsetup: disable encryption via header rewrite
  • CWE-345: Insufficient Verification of Data Authenticity
  • FAQ: Frequently asked questions about CVE-2021-4122