Cisco Firepower Threat Defense Software Snort Firewall Denial of Service Vulnerability

CVE-2024-20351

Summary

A vulnerability exists in the TCP/IP traffic handling function of Cisco's Snort Detection Engine within the Firepower Threat Defense (FTD) Software and FirePOWER Services. This flaw allows an unauthenticated, remote adversary to disrupt legitimate network activities by overwhelming the affected system with excessive TCP/IP traffic. Exploiting this vulnerability can result in a denial of service (DoS) condition, where network traffic is erroneously dropped, significantly impairing system performance. To recover from this condition, a reboot of the affected device is required.

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