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cve[email protected]CVE-2020-3455
HistoryOct 21, 2020 - 7:15 p.m.

CVE-2020-3455

2020-10-2119:15:16
CWE-693
web.nvd.nist.gov
33
cisco
fxos software
vulnerability
secure boot
authenticated
local attacker
code injection
persistence
nvd
cve-2020-3455

7.8 High

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

7.4 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

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

NVD
Node
ciscofirepower_4110Match-
OR
ciscofirepower_4112Match-
OR
ciscofirepower_4115Match-
OR
ciscofirepower_4120Match-
OR
ciscofirepower_4125Match-
OR
ciscofirepower_4140Match-
OR
ciscofirepower_4145Match-
OR
ciscofirepower_4150Match-
OR
ciscofirepower_9300_sm-24Match-
OR
ciscofirepower_9300_sm-36Match-
OR
ciscofirepower_9300_sm-40Match-
OR
ciscofirepower_9300_sm-44Match-
OR
ciscofirepower_9300_sm-44_x_3Match-
OR
ciscofirepower_9300_sm-48Match-
OR
ciscofirepower_9300_sm-56Match-
OR
ciscofirepower_9300_sm-56_x_3Match-
AND
ciscofirepower_extensible_operating_systemRange<2.4.1.268
OR
ciscofirepower_extensible_operating_systemRange2.62.6.1.214
OR
ciscofirepower_extensible_operating_systemRange2.72.7.1.131

CNA Affected

[
  {
    "product": "Cisco Firepower Extensible Operating System (FXOS) ",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

7.8 High

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

7.4 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.1%

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