Cisco IOS XE Catalyst SD-WAN up to 17.13.1a Unified Threat Defense denial of service

Summaryinfo

A vulnerability categorized as critical has been discovered in Cisco IOS XE Catalyst SD-WAN. The affected element is an unknown function of the component Unified Threat Defense. Executing a manipulation can lead to denial of service. This vulnerability is tracked as CVE-2024-20455. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco IOS XE Catalyst SD-WAN and classified as critical. This vulnerability affects an unknown functionality of the component Unified Threat Defense. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the process that classifies traffic that is going to the Unified Threat Defense (UTD) component of Cisco IOS XE Software in controller mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because UTD improperly handles certain packets as those packets egress an SD-WAN IPsec tunnel. An attacker could exploit this vulnerability by sending crafted traffic through an SD-WAN IPsec tunnel that is configured on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: SD-WAN tunnels that are configured with Generic Routing Encapsulation (GRE) are not affected by this vulnerability.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability was named CVE-2024-20455 since 11/08/2023. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/07/2025). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 213518 (Cisco Catalyst SD-WAN Routers DoS (cisco-sa-sdwan-utd-dos-hDATqxs)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (213518). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE Catalyst SD-WAN

Version

• 17.5.1a
• 17.6.1a
• 17.6.2
• 17.6.3a
• 17.6.4
• 17.7.1a
• 17.7.2
• 17.8.1a
• 17.9.1a
• 17.9.2a
• 17.9.3a
• 17.9.4
• 17.9.5a
• 17.10.1a
• 17.11.1a
• 17.12.1a
• 17.12.2
• 17.13.1a

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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