CVE-2023-36476

`calamares-nixos-extensions` LUKS keyfile exposure

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

calamares-nixos-extensions provides Calamares branding and modules for NixOS, a distribution of GNU/Linux. Users of calamares-nixos-extensions version 0.3.12 and prior who installed NixOS through the graphical calamares installer, with an unencrypted `/boot`, on either non-UEFI systems or with a LUKS partition different from `/` have their LUKS key file in `/boot` as a plaintext CPIO archive attached to their NixOS initrd. A patch is available and anticipated to be part of version 0.3.13 to backport to NixOS 22.11, 23.05, and unstable channels. Expert users who have a copy of their data may, as a workaround, re-encrypt the LUKS partition(s) themselves.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-06-21 CVE Reserved
2023-06-29 CVE Published
2023-07-08 EPSS Updated
2024-08-02 CVE Updated
2024-08-02 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-522: Insufficiently Protected Credentials

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/osresearch/heads/issues/1348	2024-08-02

URL	Date	SRC
https://github.com/vlinkz/calamares-nixos-extensions/commit/837ca4da5521a74d3b5ca6f7b88890a6713faa22	2023-07-07

URL	Date	SRC
https://github.com/NixOS/calamares-nixos-extensions/security/advisories/GHSA-3rvf-24q2-24ww	2023-07-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nixos Search vendor "Nixos"		Calamares-nixos-extensions Search vendor "Nixos" for product "Calamares-nixos-extensions"				< 0.3.13 Search vendor "Nixos" for product "Calamares-nixos-extensions" and version " < 0.3.13"		-		Affected