XZ Utils 5.6.0 / 5.6.1 Liblzma Backdoor Check

critical Nessus Plugin ID 192737

Synopsis

The version of XZ Utils installed on the remote host is affected by a backdoor vulnerability.

Description

The version of XZ Utils installed on the remote host is potentially affected by a backdoor vulnerability.

Note: This plugin is paranoid because not all instances of the affected versions of XZ Utils are known to be vulnerable to the backdoor. The method of installation of XZ Utils plays a role in whether the install is vulnerable or not. However, multiple vendors have rolled out remediation fixes as a precaution.

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

As this detection can lead to potential false positives, it is recommended that manual verification of identified instances be performed.

For more information, refer to https://www.tenable.com/blog/frequently-asked-questions-cve-2024-3094-supply-chain-backdoor-in-xz-utils

Solution

See vendor advisory.

See Also

http://www.nessus.org/u?ff42ccd0

http://www.nessus.org/u?14f3969d

http://www.nessus.org/u?179ce062

Plugin Details

Severity: Critical

ID: 192737

File Name: xz_utils_nix_5.6_backdoor.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 4/1/2024

Updated: 4/3/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 10.0

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

CVSS Score Source: CVE-2024-3094

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9.5

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

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

Vulnerability Information

CPE: p-cpe:/a:xz-utils

Required KB Items: installed_sw/XZ Utils, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/29/2024

Vulnerability Publication Date: 3/29/2024

Reference Information

CVE: CVE-2024-3094