Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers Multicast DNS DoS (cisco-sa-mdns-dos-3tH6cA9J)

High Nessus Plugin ID 141461

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 4.4


The remote device is missing a vendor-supplied security patch


A denial of service (DoS) vulnerability exists in Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers due to improper validation of mDNS packets. An unauthenticated, remote attacker can exploit this issue, via a crafted mDNS packet to an affected device, to cause the device to reload.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvr57654

See Also

Plugin Details

Severity: High

ID: 141461

File Name: cisco-sa-mdns-dos-3tH6cA9J-iosxe.nasl

Version: 1.7

Type: local

Family: CISCO

Published: 2020/10/15

Updated: 2021/01/08

Dependencies: 67217

Risk Information

Risk Factor: High

VPR Score: 4.4

CVSS Score Source: CVE-2020-3359

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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/device_model

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/09/24

Vulnerability Publication Date: 2020/09/24

Reference Information

CVE: CVE-2020-3359


CISCO-SA: cisco-sa-mdns-dos-3tH6cA9J

IAVA: 2020-A-0439

CWE: 20