Denial of service in Cisco Firepower Threat Defense (FTD) Software

1) Input validation error

EUVDB-ID: #VU82677

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-20270

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper error-checking in the interaction between the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Firepower Threat Defense (FTD): 3.1.0.100 - 3.1.36.100

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_ftd:3.1.0.500:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:3.1.7.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:3.1.21.400:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:3.1.36.100:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-smbsnort3-dos-pfOjOYUV

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.