Insufficient verification of data authenticity in cryptsetup - CVE-2021-4122
Published: May 27, 2022
Vulnerability identifier: #VU63770
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-4122
CWE-ID: CWE-345
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
cryptsetup
cryptsetup
Software vendor:
cryptsetup
cryptsetup
Description
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists due to improper handling of the LUKS2 reencryption recover. A local attacker with physical access to the medium can send a specially crafted LUKS header and trick cryptsetup into disabling encryption during the recovery of the device.
The vulnerability exists due to improper handling of the LUKS2 reencryption recover. A local attacker with physical access to the medium can send a specially crafted LUKS header and trick cryptsetup into disabling encryption during the recovery of the device.
Remediation
Install updates from vendor's website.