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Ubuntu 20.04 LTS : cryptsetup vulnerability (USN-5286-1)

medium Nessus Plugin ID 158072

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5286-1 advisory.

 Milan Broz discovered that cryptsetup incorrectly handled LUKS2 reencryption recovery. An attacker with physical access to modify the encrypted device header may trigger the device to be unencrypted the next time it is mounted by the user.

 On Ubuntu 20.04 LTS, this issue was fixed by disabling the online reencryption feature.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-5286-1

Plugin Details

Severity: Medium

ID: 158072

File Name: ubuntu_USN-5286-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 2/15/2022

Updated: 8/28/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2021-4122

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libcryptsetup-dev, p-cpe:/a:canonical:ubuntu_linux:cryptsetup-run, p-cpe:/a:canonical:ubuntu_linux:cryptsetup-bin, p-cpe:/a:canonical:ubuntu_linux:cryptsetup, p-cpe:/a:canonical:ubuntu_linux:libcryptsetup12, p-cpe:/a:canonical:ubuntu_linux:cryptsetup-initramfs

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 2/15/2022

Vulnerability Publication Date: 2/1/2022

Reference Information

CVE: CVE-2021-4122

USN: 5286-1