CVE-2024-20351

HIGH
Published Oct 23, 2024 Modified Aug 11, 2025 CWE-400

Description

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.

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CVSS v3.1 Score

8.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor Product
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software
cisco firepower_threat_defense_software

References

Frequently Asked Questions

What is CVE-2024-20351? +
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 has a CVSS v3.1 base score of 8.6 (HIGH).
How severe is CVE-2024-20351? +
CVE-2024-20351 has a CVSS v3.1 score of 8.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-20351? +
CVE-2024-20351 affects products from cisco, specifically: firepower_threat_defense_software. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-20351? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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