CVE-2020-3455

 

Published at: - 21-10-2020 09:15

Last modified: - 23-11-2022 04:16

Total changes: - 2

Description

A vulnerability in the secure boot process of Cisco FXOS Software could allow an authenticated, local attacker to bypass the secure boot mechanisms. The vulnerability is due to insufficient protections of the secure boot process. An attacker could exploit this vulnerability by injecting code into a specific file that is then referenced during the device boot process. A successful exploit could allow the attacker to break the chain of trust and inject code into the boot process of the device which would be executed at each boot and maintain persistence across reboots.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• 20201021 Cisco FXOS Software for Firepower 4100/9300 Series Appliances Secure Boot Bypass Vulnerability-Patch, Vendor Advisory

 

Keywords

NVD

 

CVE-2020-3455

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures