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Cisco NX-OS Software Image Verification Bypass (cisco-sa-nxos-image-sig-bypas-pQDRQvjL)

medium Nessus Plugin ID 213166

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, the remote device is affected by a vulnerability.

 - A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification. This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software. (CVE-2024-20397)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwh76163, CSCwh76166, CSCwj35846, CSCwm47438, CSCwn11901

See Also

http://www.nessus.org/u?4e325ee8

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwh76163

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwh76166

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj35846

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwm47438

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn11901

Plugin Details

Severity: Medium

ID: 213166

File Name: cisco-sa-nxos-image-sig-bypas-pQDRQvjL.nasl

Version: 1.3

Type: combined

Family: CISCO

Published: 12/18/2024

Updated: 5/6/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:C/A:N

CVSS Score Source: CVE-2024-20397

CVSS v3

Risk Factor: Medium

Base Score: 5.2

Temporal Score: 4.5

Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:nx-os

Required KB Items: Host/Cisco/NX-OS/Version, Host/Cisco/NX-OS/Model, Host/Cisco/NX-OS/Device

Exploit Ease: No known exploits are available

Patch Publication Date: 12/4/2024

Vulnerability Publication Date: 12/4/2024

Reference Information

CVE: CVE-2024-20397

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