CVE-2021-21556 Information

Description

Dell PowerEdge R640 R740 R740XD R840 R940 R940xa MX740c MX840c and T640 Server BIOS contain a stack-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious user with high privileges may potentially exploit this vulnerability leading to a denial of Service arbitrary code execution or information disclosure in UEFI or BIOS Preboot Environment.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Reference

https://www.dell.com/support/kbdoc/000187958

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.7