Cisco NX-OS Software Border Gateway Protocol Multicast VPN DoS (cisco-sa-nxosbgp-nlri-dos-458rG2OQ)

high Nessus Plugin ID 140189

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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 Software is affected by a vulnerability in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) due to incomplete input validation of a specific type of BGP MVPN update. An unauthenticated, remote attacker can exploit this, by sending a specific, valid BGP MVPN update message to a targeted device, in order to cause it to unexpectedly reload, resulting in a denial of service (DoS) condition).

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 CSCvr58652

Plugin Details

Severity: High

ID: 140189

File Name: cisco-sa-nxosbgp-nlri-dos-458rG2OQ.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 9/2/2020

Updated: 3/8/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2020-3397

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-2020-3397

CWE: 20

CISCO-SA: cisco-sa-nxosbgp-nlri-dos-458rG2OQ

IAVA: 2020-A-0394-S

CISCO-BUG-ID: CSCvr58652

Detections

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