Cisco Firepower Threat Defense Software up to 7.3.1.1 SMB denial of service

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco Firepower Threat Defense Software up to 7.3.1.1. Affected by this issue is some unknown functionality of the component SMB Handler. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2023-20270. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco Firepower Threat Defense Software up to 7.3.1.1 (Firewall Software). This affects an unknown functionality of the component SMB Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the interaction between the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the configured policies or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error-checking when the Snort 3 detection engine is processing SMB traffic. An attacker could exploit this vulnerability by sending a crafted SMB packet stream through an affected device. A successful exploit could allow the attacker to cause the Snort process to reload, resulting in a DoS condition.

The weakness was published 11/01/2023 as cisco-sa-ftd-smbsnort3-dos-pfOjOYUV. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2023-20270 since 10/27/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 264480 (Cisco Firepower Threat Defense Software SMB Protocol Snort 3 Detection Engine Bypass and DoS (cisco-sa-ftd-smbsnort3-dos-pfOjOYUV)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (264480). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• Firepower Threat Defense Software

Version

• 7.1.0
• 7.1.0.1
• 7.1.0.2
• 7.1.0.3
• 7.2.0
• 7.2.0.1
• 7.2.1
• 7.2.2
• 7.2.3
• 7.3.0
• 7.3.1
• 7.3.1.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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