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HIGH · 7.4

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 ...

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.

CVSS Score

7.4

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoIos Xe17.2.1
CiscoCatalyst 9800-Cl Wireless Controllers For CloudAll versions
CiscoCatalyst 9105Axi-
CiscoCatalyst 9115Axe-
CiscoCatalyst 9115Axi-
CiscoCatalyst 9117Axi-
CiscoCatalyst 9120Axe-
CiscoCatalyst 9120Axi-
CiscoCatalyst 9120Axp-
CiscoCatalyst 9130Axe-
CiscoCatalyst 9130Axi-
CiscoCatalyst 9800-40-
CiscoCatalyst 9800-80-
CiscoCatalyst 9800-L-
CiscoCatalyst Cw9800H1-
CiscoCatalyst Cw9800H2-
CiscoCatalyst Cw9800M-

Related Weaknesses (CWE)

CWE-459

References

FAQ

What is CVE-2024-20303?

CVE-2024-20303 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 ...

How severe is CVE-2024-20303?

CVE-2024-20303 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2024-20303?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe, Cisco Catalyst 9800-Cl Wireless Controllers For Cloud, Cisco Catalyst 9105Axi, Cisco Catalyst 9115Axe, Cisco Catalyst 9115Axi.