Cisco Nexus 9000 Series Fabric Switches ACI Mode BGP Route Installation DoS (cisco-sa-n9kaci-bgp-De9dPKSK)

high Nessus Plugin ID 149957

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) is affected by denial of service vulnerability due to an issue with the installation of routes upon receipt of a BGP update. An unauthenticated, remote attacker could exploit this by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP).

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvr59494

See Also

http://www.nessus.org/u?e39258be

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr59494

Plugin Details

Severity: High

ID: 149957

File Name: cisco-sa-n9kaci-bgp-De9dPKSK.nasl

Version: 1.4

Type: combined

Family: CISCO

Published: 5/26/2021

Updated: 5/27/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-1230

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/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, Host/aci/system/chassis/summary

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2021

Vulnerability Publication Date: 2/24/2021

Reference Information

CVE: CVE-2021-1230

CWE: 233

CISCO-SA: cisco-sa-n9kaci-bgp-De9dPKSK

CISCO-BUG-ID: CSCvr59494