CVE-2018-3968

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.

Existe una vulnerabilidad explotable en la protección verificada de arranque de Das U-Boot, desde la versión 2013.07-rc1 hasta la 2014.07-rc2. Las versiones afectadas carecen de una aplicación adecuada de las firmas FIT, lo que permite que un atacante omita el arranque verificado de U-Boot y ejecute un kernel sin firmar, embebido en un formato de imagen heredado. Para desencadenar esta vulnerabilidad, un atacante local necesita ser capaz de proporcionar la imagen de arranque.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-01-02 CVE Reserved
2019-03-21 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				>= 2013.07 <= 2014.07 Search vendor "Denx" for product "U-boot" and version " >= 2013.07 <= 2014.07"		-		Affected
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				2013.07 Search vendor "Denx" for product "U-boot" and version "2013.07"		rc1		Affected
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				2013.07 Search vendor "Denx" for product "U-boot" and version "2013.07"		rc2		Affected
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				2013.07 Search vendor "Denx" for product "U-boot" and version "2013.07"		rc3		Affected
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				2014.07 Search vendor "Denx" for product "U-boot" and version "2014.07"		rc1		Affected
Denx Search vendor "Denx"		U-boot Search vendor "Denx" for product "U-boot"				2014.07 Search vendor "Denx" for product "U-boot" and version "2014.07"		rc2		Affected