PT-2021-14618 · Dell · Dell Uefi Bios

Published 2021-06-24 · Updated 2021-07-02 · CVE-2021-21571

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Name of the Vulnerable Software and Affected Versions Dell UEFI BIOS (affected versions not specified)

Description The issue concerns an improper certificate validation vulnerability in the Dell UEFI BIOS https stack, which is used by the Dell BIOSConnect feature and Dell HTTPS Boot feature. This vulnerability can be exploited by a remote unauthenticated attacker using a person-in-the-middle attack, potentially leading to a denial of service and payload tampering.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2021-21571

Affected Products

Dell Uefi Bios

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-21571 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21571 · Vendor Advisory
• https://dell.com/support/kbdoc/en-us/000188682 · Vendor Advisory
• https://t.me/cvenotify/16998 · Telegram Post