Cisco NX-OS Software MPLS OAM DoS (cisco-sa-nxos-mpls-oam-dos-sGO9x5GM)

high Nessus Plugin ID 157903

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Synopsis

The remote device is missing a vendor-supplied security patch (cisco-sa-nxos-mpls-oam-dos-sGO9x5GM)

Description

According to its self-reported version, Cisco NX-OS Software is affected by a vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature that allows an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation when an affected device is processing an MPLS echo-request or echo-reply packet. An attacker could exploit this vulnerability by sending malicious MPLS echo-request or echo-reply packets to an interface that is enabled for MPLS forwarding on the affected device. A successful exploit could allow the attacker to cause the MPLS OAM process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.

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 CSCvx48078, CSCvx66765

Plugin Details

Severity: High

ID: 157903

File Name: cisco-sa-nxos-mpls-oam-dos-sGO9x5GM.nasl

Version: 1.6

Type: combined

Family: CISCO

Published: 2/11/2022

Updated: 2/9/2023

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-2021-1588

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: 8/25/2021

Vulnerability Publication Date: 8/25/2021

Reference Information

CVE: CVE-2021-1588

CISCO-SA: cisco-sa-nxos-mpls-oam-dos-sGO9x5GM

CISCO-BUG-ID: CSCvx48078, CSCvx66765

Detections

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