CVEvulnerability
CVE-2020-3455
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-10-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.0 ([email protected])
- 6.7 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-693
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.
Affected configurations
• cisco firepower extensible operating system (< 2.4.1.268)
• cisco firepower extensible operating system (>= 2.6 < 2.6.1.214)
• cisco firepower extensible operating system (>= 2.7 < 2.7.1.131)
Related
Weakness · CWE (1)
- CWE-693 Protection Mechanism Failure weakness