Cisco IOS XE Software for Catalyst 9800 Series DoS (cisco-sa-iosxe-wlc-fnfv9-EvrAQpNX)

high Nessus Plugin ID 141368
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS XE Software is affected by a DoS vulnerability in the Flexible NetFlow Version 9 packet processor due to insufficient validation of certain parameters in a Flexible NetFlow Version 9 record. An unauthenticated, remote attacker could cause a DoS condition on an affected device. Please see the included Cisco BID and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvr55382

See Also

http://www.nessus.org/u?f624c003

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74268

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr55382

Plugin Details

Severity: High

ID: 141368

File Name: cisco-sa-iosxe-wlc-fnfv9-EvrAQpNX-iosxe.nasl

Version: 1.9

Type: local

Family: CISCO

Published: 10/12/2020

Updated: 3/29/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

CVSS Score Source: CVE-2020-3492

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Temporal Vector: E:U/RL:OF/RC:C

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: 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: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3492

CISCO-BUG-ID: CSCvr55382

CISCO-SA: cisco-sa-iosxe-wlc-fnfv9-EvrAQpNX

IAVA: 2020-A-0439

CWE: 20