Detections
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Cisco NX-OS Software Cisco Fabric Services DoS (cisco-sa-fxos-nxos-cfs-dos-dAmnymbd)

high Nessus Plugin ID 142423

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, the Cisco NX-OS Software is affected by a denial of service (DoS) vulnerability. It exists in Cisco fabric services due to insufficient error handling of Cisco fabric service messages. An unauthenticated, remote attacker can exploit this issue, via sending crafted Cisco fabric service messages to an affected device, resulting in a Denial of Service event.

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 CSCvt39630, CSCvt46835, CSCvt46837

See Also

http://www.nessus.org/u?947dee6e

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74239

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt39630

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt46835

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt46837

Plugin Details

Severity: High

ID: 142423

File Name: cisco-sa-fxos-nxos-cfs-dos-dAmnymbd.nasl

Version: 1.5

Type: combined

Family: CISCO

Published: 11/4/2020

Updated: 11/5/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2020-3517

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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: 8/26/2020

Vulnerability Publication Date: 8/26/2020

Reference Information

CVE: CVE-2020-3517