Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2020-3455

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
21/10/2020
Last modified:
28/10/2020

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.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH
Vector 2.0
AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
7.20
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* 2.4.1.268 (excluding)
cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* 2.6 (including) 2.6.1.214 (excluding)
cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* 2.7 (including) 2.7.1.131 (excluding)
cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4112:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_9300_sm-24:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_9300_sm-36:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_9300_sm-40:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:firepower_9300_sm-44:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools