CVE-2016-4484

Cryptsetup 2:1.7.3-2 Root Initramfs Shell

Severity Score

6.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Debian initrd script for the cryptsetup package 2:1.7.3-2 and earlier allows physically proximate attackers to gain shell access via many log in attempts with an invalid password.

La secuencia de comandos initrd de Debian para el paquete cryptsetup 2:1.7.3-2 y versiones anteriores permite a atacantes físicamente próximos obtener acceso a shell a través de muchos intentos de inicio de sesión con una contraseña no válida.

A vulnerability in Cryptsetup, concretely in the scripts that unlock the system partition when the partition is ciphered using LUKS (Linux Unified Key Setup). This vulnerability allows to obtain a root initramfs shell on affected systems. The vulnerability is very reliable because it doesn't depend on specific systems or configurations. Attackers can copy, modify or destroy the hard disc as well as set up the network to data. In cloud environments it is also possible to remotely exploit this vulnerability without having "physical access". Cryptsetup versions 2:1.7.3-2 and below are affected.

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-05-04 CVE Reserved
2016-11-16 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-07-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-287: Improper Authentication

CAPEC

References (7)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/11/14/13	Mailing List
http://www.openwall.com/lists/oss-security/2016/11/15/1	Mailing List
http://www.openwall.com/lists/oss-security/2016/11/15/4	Mailing List
http://www.openwall.com/lists/oss-security/2016/11/16/6	Mailing List
http://www.securityfocus.com/bid/94315	Vdb Entry

URL	Date	SRC
http://hmarco.org/bugs/CVE-2016-4484/CVE-2016-4484_cryptsetup_initrd_shell.html	2024-08-06

URL	Date	SRC
https://gitlab.com/cryptsetup/cryptsetup/commit/ef8a7d82d8d3716ae9b58179590f7908981fa0cb	2017-01-26

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cryptsetup Project Search vendor "Cryptsetup Project"		Cryptsetup Search vendor "Cryptsetup Project" for product "Cryptsetup"				<= 2.1.7.3-2 Search vendor "Cryptsetup Project" for product "Cryptsetup" and version " <= 2.1.7.3-2"		-		Affected