CVE-2024-20303
"Cisco Wireless LAN Controllers mDNS Gateway Denial of Service Vulnerability"
Description
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.
INFO
Published Date :
March 27, 2024, 5:15 p.m.
Last Modified :
July 31, 2025, 4:56 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2024-20303
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwf53124
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-20303.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-20303 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-20303
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-20303 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-20303 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 31, 2025
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.4.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.2.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.2.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.1w:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.2a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.1z:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.4.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.4.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.5.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.5:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.4a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.6:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.4b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.4c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.5a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.4.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.4.2a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.5.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1w:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.3a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.7.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.7.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.7.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.10.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.8.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.8.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.11.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.5b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.7:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.8:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.3.8a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1x:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1y:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1z:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.1z1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.5:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.6.5a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.7.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.10.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.10.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1w:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1x:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1y:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.2a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1x1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.3a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.9.1y1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.11.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.11.99sw:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9105axi:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9115axe:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9115axi:-:*:*:*:*:*:*:* cpe:2.3:a:cisco:catalyst_9800-cl_wireless_controllers_for_cloud:*:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9117axi:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9120axe:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9120axi:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9120axp:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9130axe:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_9130axi:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_cw9800h1:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_cw9800h2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_cw9800m:-:*:*:*:*:*:*:* Added Reference Type CVE: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGf Types: Vendor Advisory Added Reference Type Cisco Systems, Inc.: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGf Types: Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGf -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Received by [email protected]
Mar. 27, 2024
Action Type Old Value New Value Added Description 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. Added Reference Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGf [No types assigned] Added CWE Cisco Systems, Inc. CWE-459 Added CVSS V3.1 Cisco Systems, Inc. AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H