Cisco IOS XE up to 17.11.99SW mDNS Gateway cleanup

Summaryinfo

A vulnerability has been found in Cisco IOS XE and classified as critical. This issue affects some unknown processing of the component mDNS Gateway. The manipulation leads to cleanup. This vulnerability is uniquely identified as CVE-2024-20303. The attack can only be initiated within the local network. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco IOS XE. It has been rated as critical. This issue affects an unknown part of the component mDNS Gateway. The manipulation with an unknown input leads to a cleanup vulnerability. Using CWE to declare the problem leads to CWE-459. The product does not properly "clean up" and remove temporary or supporting resources after they have been used. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2024-20303 since 11/08/2023. The exploitation is known to be easy. The attack needs to be done within the local network. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

Version

• 17.2.1
• 17.2.1a
• 17.2.1r
• 17.2.1v
• 17.2.2
• 17.2.3
• 17.3.1
• 17.3.1a
• 17.3.1w
• 17.3.1x
• 17.3.1z
• 17.3.2
• 17.3.2a
• 17.3.3
• 17.3.4
• 17.3.4a
• 17.3.4b
• 17.3.4c
• 17.3.5
• 17.3.5a
• 17.3.5b
• 17.3.6
• 17.3.7
• 17.3.8
• 17.3.8a
• 17.4.1
• 17.4.1a
• 17.4.1b
• 17.4.2
• 17.4.2a
• 17.5.1
• 17.5.1a
• 17.6.1
• 17.6.1a
• 17.6.1w
• 17.6.1x
• 17.6.1y
• 17.6.1z
• 17.6.1z1
• 17.6.2
• 17.6.3
• 17.6.3a
• 17.6.4
• 17.6.5
• 17.6.5a
• 17.7.1
• 17.7.1a
• 17.7.1b
• 17.7.2
• 17.8.1
• 17.8.1a
• 17.9.1
• 17.9.1a
• 17.9.1w
• 17.9.1x
• 17.9.1x1
• 17.9.1y
• 17.9.1y1
• 17.9.2
• 17.9.2a
• 17.9.3
• 17.9.3a
• 17.10.1
• 17.10.1a
• 17.10.1b
• 17.11.1
• 17.11.1a
• 17.11.99SW

License

• commercial

Website

• Vendor: https://www.cisco.com/

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