Vulnerability Monitor

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CVE-2024-20303

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.

Published

2024-03-27T17:15:51.880

Last Modified

2025-07-31T16:56:36.940

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.4 (HIGH)

Weaknesses
  • Type: Secondary
    CWE-459
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe 17.2.1 Yes
Operating System cisco ios_xe 17.2.1a Yes
Operating System cisco ios_xe 17.2.1r Yes
Operating System cisco ios_xe 17.2.1v Yes
Operating System cisco ios_xe 17.2.2 Yes
Operating System cisco ios_xe 17.2.3 Yes
Operating System cisco ios_xe 17.3.1 Yes
Operating System cisco ios_xe 17.3.1a Yes
Operating System cisco ios_xe 17.3.1w Yes
Operating System cisco ios_xe 17.3.1x Yes
Operating System cisco ios_xe 17.3.1z Yes
Operating System cisco ios_xe 17.3.2 Yes
Operating System cisco ios_xe 17.3.2a Yes
Operating System cisco ios_xe 17.3.3 Yes
Operating System cisco ios_xe 17.3.4 Yes
Operating System cisco ios_xe 17.3.4a Yes
Operating System cisco ios_xe 17.3.4b Yes
Operating System cisco ios_xe 17.3.4c Yes
Operating System cisco ios_xe 17.3.5 Yes
Operating System cisco ios_xe 17.3.5a Yes
Operating System cisco ios_xe 17.3.5b Yes
Operating System cisco ios_xe 17.3.6 Yes
Operating System cisco ios_xe 17.3.7 Yes
Operating System cisco ios_xe 17.3.8 Yes
Operating System cisco ios_xe 17.3.8a Yes
Operating System cisco ios_xe 17.4.1 Yes
Operating System cisco ios_xe 17.4.1a Yes
Operating System cisco ios_xe 17.4.1b Yes
Operating System cisco ios_xe 17.4.2 Yes
Operating System cisco ios_xe 17.4.2a Yes
Operating System cisco ios_xe 17.5.1 Yes
Operating System cisco ios_xe 17.5.1a Yes
Operating System cisco ios_xe 17.6.1 Yes
Operating System cisco ios_xe 17.6.1a Yes
Operating System cisco ios_xe 17.6.1w Yes
Operating System cisco ios_xe 17.6.1x Yes
Operating System cisco ios_xe 17.6.1y Yes
Operating System cisco ios_xe 17.6.1z Yes
Operating System cisco ios_xe 17.6.1z1 Yes
Operating System cisco ios_xe 17.6.2 Yes
Operating System cisco ios_xe 17.6.3 Yes
Operating System cisco ios_xe 17.6.3a Yes
Operating System cisco ios_xe 17.6.4 Yes
Operating System cisco ios_xe 17.6.5 Yes
Operating System cisco ios_xe 17.6.5a Yes
Operating System cisco ios_xe 17.7.1 Yes
Operating System cisco ios_xe 17.7.1a Yes
Operating System cisco ios_xe 17.7.1b Yes
Operating System cisco ios_xe 17.7.2 Yes
Operating System cisco ios_xe 17.8.1 Yes
Operating System cisco ios_xe 17.8.1a Yes
Operating System cisco ios_xe 17.9.1 Yes
Operating System cisco ios_xe 17.9.1a Yes
Operating System cisco ios_xe 17.9.1w Yes
Operating System cisco ios_xe 17.9.1x Yes
Operating System cisco ios_xe 17.9.1x1 Yes
Operating System cisco ios_xe 17.9.1y Yes
Operating System cisco ios_xe 17.9.1y1 Yes
Operating System cisco ios_xe 17.9.2 Yes
Operating System cisco ios_xe 17.9.2a Yes
Operating System cisco ios_xe 17.9.3 Yes
Operating System cisco ios_xe 17.9.3a Yes
Operating System cisco ios_xe 17.10.1 Yes
Operating System cisco ios_xe 17.10.1a Yes
Operating System cisco ios_xe 17.10.1b Yes
Operating System cisco ios_xe 17.11.1 Yes
Operating System cisco ios_xe 17.11.1a Yes
Operating System cisco ios_xe 17.11.99sw Yes
Application cisco catalyst_9800-cl_wireless_controllers_for_cloud * No
Hardware cisco catalyst_9105axi - No
Hardware cisco catalyst_9115axe - No
Hardware cisco catalyst_9115axi - No
Hardware cisco catalyst_9117axi - No
Hardware cisco catalyst_9120axe - No
Hardware cisco catalyst_9120axi - No
Hardware cisco catalyst_9120axp - No
Hardware cisco catalyst_9130axe - No
Hardware cisco catalyst_9130axi - No
Hardware cisco catalyst_9800-40 - No
Hardware cisco catalyst_9800-80 - No
Hardware cisco catalyst_9800-l - No
Hardware cisco catalyst_cw9800h1 - No
Hardware cisco catalyst_cw9800h2 - No
Hardware cisco catalyst_cw9800m - No
References