CVE-2021-21551

Dell dbutil Driver Insufficient Access Control Vulnerability

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of service, or information disclosure. Local authenticated user access is required.

El controlador Dell dbutil_2_3.sys, contiene una vulnerabilidad de control de acceso insuficiente que puede conllevar a una escalada de privilegios, denegación de servicio o divulgación de información. Es requerido un acceso de usuario autenticado local

The DBUtil_2_3.sys driver distributed by Dell exposes an unprotected IOCTL interface that can be abused by an attacker to read and write kernel-mode memory.

Dell dbutil driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial-of-service (DoS), or information disclosure.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-05-04 CVE Published
2021-05-04 First Exploit
2022-03-31 Exploited in Wild
2022-04-21 KEV Due Date
2024-05-21 EPSS Updated
2024-09-16 CVE Updated

CWE

CWE-782: Exposed IOCTL with Insufficient Access Control

CAPEC

References (13)

URL	Tag	Source

URL	Date	SRC
https://www.exploit-db.com/exploits/49893	2021-05-21
https://github.com/waldo-irc/CVE-2021-21551	2021-05-20
https://github.com/mathisvickie/CVE-2021-21551	2021-11-16
https://github.com/ihack4falafel/Dell-Driver-EoP-CVE-2021-21551	2021-09-03
https://github.com/ch3rn0byl/CVE-2021-21551	2021-05-21
https://github.com/mzakocs/CVE-2021-21551-POC	2021-07-20
https://github.com/nanabingies/CVE-2021-21551	2023-02-03
https://github.com/Eap2468/CVE-2021-21551	2024-08-02
https://github.com/arnaudluti/PS-CVE-2021-21551	2021-06-20
http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.html	2024-09-16
http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.html	2024-09-16
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/cve_2021_21551_dbutil_memmove.rb	2021-05-04

URL	Date	SRC

URL	Date	SRC
https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability	2024-07-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Dell Search vendor "Dell"		Dbutil 2 3.sys Search vendor "Dell" for product "Dbutil 2 3.sys"				-		-		Affected