#VU99341 Access of Memory Location After End of Buffer in Cisco Firepower Threat Defense (FTD) and Firepower 2100 Series Security Appliances - CVE-2024-20330

Vulnerability identifier: #VU99341

Vulnerability risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

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): 7.0.0 - 7.0.6.3, 7.1.0 - 7.1.0.3, 7.2.0 - 7.2.8.1, 7.3.0 - 7.3.1.2, 7.4.1 - 7.4.1.1

Firepower 2100 Series Security Appliances: All versions

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External links
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd2100-snort-dos-M9HuMt75
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-M446vbEO
https://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.