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Cisco IOS XE Software for Wireless LAN Controllers Multicast DNS DoS (cisco-sa-wlc-mdns-dos-4hv6pBGf)

high Nessus Plugin ID 193265

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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 vulnerability.

 - A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper management of mDNS client entries. An attacker could exploit this vulnerability by connecting to the wireless network and sending a continuous stream of specific mDNS packets. A successful exploit could allow the attacker to cause the wireless controller to have high CPU utilization, which could lead to access points (APs) losing their connection to the controller and result in a DoS condition. (CVE-2024-20303)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwf53124

See Also

http://www.nessus.org/u?53fd7c9e

http://www.nessus.org/u?a1da659d

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwf53124

Plugin Details

Severity: High

ID: 193265

File Name: cisco-sa-wlc-mdns-dos-4hv6pBGf-iosxe.nasl

Version: 1.1

Type: combined

Family: CISCO

Published: 4/12/2024

Updated: 9/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2024-20303

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:A/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: 3/27/2024

Vulnerability Publication Date: 3/27/2024

Reference Information

CVE: CVE-2024-20303

CWE: 459

CISCO-SA: cisco-sa-wlc-mdns-dos-4hv6pBGf

IAVA: 2024-A-0188-S

CISCO-BUG-ID: CSCwf53124