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Cisco NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability (cisco-sa-20200205-fxnxos-iosxr-cdp-dos)

medium Nessus Plugin ID 133722

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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 vulnerability within the Cisco Discovery Protocol due to missing a check when processing protocol messages. An unauthenticated, adjacent attacker can exploit this to cause the device to reboot.

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 CSCvr14976, CSCvr15072, CSCvr15073, CSCvr15078, CSCvr15079, CSCvr15082, and CSCvr15111.

See Also

http://www.nessus.org/u?3303b2ba

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr14976

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15072

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15073

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15078

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15079

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15082

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr15111

Plugin Details

Severity: Medium

ID: 133722

File Name: cisco-sa-20200205-nxos-cdp-dos.nasl

Version: 1.18

Type: combined

Family: CISCO

Published: 2/14/2020

Updated: 12/6/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2020-3120

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/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: 2/5/2020

Vulnerability Publication Date: 2/5/2020

Reference Information

CVE: CVE-2020-3120