Cisco Firepower Threat Defense Software Snort resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in Cisco Firepower Threat Defense Software and FirePOWER Services. Affected by this issue is some unknown functionality of the component Snort. This manipulation causes resource consumption. This vulnerability appears as CVE-2024-20351. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco Firepower Threat Defense Software and FirePOWER Services (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component Snort. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in the TCP/IP traffic handling function of the Snort Detection Engine of Cisco Firepower Threat Defense (FTD) Software and Cisco FirePOWER Services could allow an unauthenticated, remote attacker to cause legitimate network traffic to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of TCP/IP network traffic. An attacker could exploit this vulnerability by sending a large amount of TCP/IP network traffic through the affected device. A successful exploit could allow the attacker to cause the Cisco FTD device to drop network traffic, resulting in a DoS condition. The affected device must be rebooted to resolve the DoS condition.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2024-20351 since 11/08/2023. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• FirePOWER Services
• Firepower Threat Defense Software

License

• commercial

Website

• Vendor: https://www.cisco.com/

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