CiscoCVE-2020-3455CVE-2020-3455
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
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
| Vendor | Product | Version | CPE |
|---|---|---|---|
| cisco | firepower_4110 | - | cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:* |
| cisco | firepower_4112 | - | cpe:2.3:h:cisco:firepower_4112:-:*:*:*:*:*:*:* |
| cisco | firepower_4115 | - | cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:* |
| cisco | firepower_4120 | - | cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:* |
| cisco | firepower_4125 | - | cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:* |
| cisco | firepower_4140 | - | cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:* |
| cisco | firepower_4145 | - | cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:* |
| cisco | firepower_4150 | - | cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:* |
| cisco | firepower_9300_sm-24 | - | cpe:2.3:h:cisco:firepower_9300_sm-24:-:*:*:*:*:*:*:* |
| cisco | firepower_9300_sm-36 | - | cpe:2.3:h:cisco:firepower_9300_sm-36:-:*:*:*:*:*:*:* |
CNA Affected
[
{
"product": "Cisco Firepower Extensible Operating System (FXOS)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]Related
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%