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Cisco Nexus 9000 Series Fabric Switches ACI Mode Multi-Pod Multi-Site TCP DoS (cisco-sa-n9kaci-tcp-dos-YXukt6gM)

high Nessus Plugin ID 158208

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco NX-OS System Software in ACI Mode is affected by a denial of service vulnerability. The vulnerability exists in Application Centric Infrastructure (ACI) mode of Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches. An unauthenticated, remote attacker can exploit this by sending specially crafted TCP data to a specific port which listens on a public-facing IP address configured for both Multi-Pod or Multi-Site resulting in system to reboot unexpectedly and cause a DoS condition.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvw87983

See Also

http://www.nessus.org/u?ee7bb5d5

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74640

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw87983

Plugin Details

Severity: High

ID: 158208

File Name: cisco-sa-n9kaci-tcp-dos-YXukt6gM.nasl

Version: 1.5

Type: combined

Family: CISCO

Published: 2/21/2022

Updated: 2/22/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-1586

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, Host/aci/system/chassis/summary

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2021

Vulnerability Publication Date: 8/25/2021

Reference Information

CVE: CVE-2021-1586