Cisco IOS XE Software for Catalyst Switches MPLS DoS (cisco-sa-iosxe-mpls-dos-Ab4OUL3)

high Nessus Plugin ID 165704

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

A vulnerability in the egress MPLS packet processing function of Cisco IOS XE Software for Cisco Catalyst 3650, Catalyst 3850, and Catalyst 9000 Family Switches could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient input validation of IPv4 traffic. An attacker could exploit this vulnerability by sending a malformed packet out of an affected MPLS-enabled interface. A successful exploit could allow the attacker to cause the device to reload, resulting in a 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 IDs CSCvy16234, CSCwa68343

Plugin Details

Severity: High

ID: 165704

File Name: cisco-sa-iosxe-mpls-dos-Ab4OUL3-iosxe.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 10/5/2022

Updated: 12/2/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2022-20870

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:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2022

Vulnerability Publication Date: 9/28/2022

Reference Information

CVE: CVE-2022-20870

CISCO-SA: cisco-sa-iosxe-mpls-dos-Ab4OUL3

CISCO-BUG-ID: CSCvy16234, CSCwa68343

Detections

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