Dell Client BIOS Multiple Vulnerabilities (DSA-2021-106)

high Nessus Plugin ID 153223
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Dell BIOS is affected by multiple vulnerabilities.

- Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. A remote unauthenticated attacker may exploit this vulnerability using a person-in-the-middle attack which may lead to a denial of service and payload tampering. (CVE-2021-21571)

- Dell BIOSConnect feature contains a buffer overflow vulnerability. An authenticated malicious admin user with local access to the system may potentially exploit this vulnerability to run arbitrary code and bypass UEFI restrictions.
(CVE-2021-21572, CVE-2021-21573, CVE-2021-21574)

Please see the included Dell Security Advisory for more information.

Solution

Check vendor advisory.

See Also

http://www.nessus.org/u?02633955

Plugin Details

Severity: High

ID: 153223

File Name: dell_bios_dsa-2021-106.nasl

Version: 1.2

Type: local

Agent: windows

Family: Windows

Published: 9/13/2021

Updated: 9/14/2021

Dependencies: bios_get_info_wmi.nbin

Risk Information

CVSS Score Source: CVE-2021-21574

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: Bios/

Exploit Ease: No known exploits are available

Patch Publication Date: 6/24/2020

Vulnerability Publication Date: 6/24/2020

Reference Information

CVE: CVE-2021-21571, CVE-2021-21572, CVE-2021-21573, CVE-2021-21574

IAVA: 2021-A-0294

CWE: 121, 122, 295, 787