Vulnerability identifier: #VU99341

Vulnerability risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20330

CWE-ID: CWE-788

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances
Firepower 2100 Series Security Appliances
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper memory management in the Snort 2 and Snort 3 TCP and UDP detection engine. A remote attacker can send specially crafted TCP or UDP packets and cause a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco Firepower Threat Defense (FTD): 7.2.8 - 7.2.8.1, 7.0.0 - 7.0.6.3, 7.2.5 - 7.2.5.2, 7.4.1 - 7.4.1.1, 7.3.1 - 7.3.1.2, 7.2.6, 7.2.7, 7.1.0 - 7.1.0.3, 7.2.4 - 7.2.4.1, 7.3.0, 7.2.3, 7.2.2, 7.2.1, 7.2.0 - 7.2.0.1

Firepower 2100 Series Security Appliances: All versions

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External links
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd2100-snort-dos-M9HuMt75
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-M446vbEO
http://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.