8.6
CWE
476
Advisory Published

cisco-sa-ftd-tcp-dos-kM9SHhOu: Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability

First published: Wed Apr 27 2022(Updated: )

A vulnerability in the TCP proxy functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper handling of TCP flows. An attacker could exploit this vulnerability by sending a crafted stream of TCP traffic through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-tcp-dos-kM9SHhOu This advisory is part of the April 2022 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: April 2022 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.

Credit: This vulnerability was found during the resolution a Cisco TAC support case

Affected SoftwareAffected VersionHow to fix
Cisco FTD Software

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability?

    The vulnerability ID for this vulnerability is cisco-sa-ftd-tcp-dos-kM9SHhOu.

  • What is the severity of the Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability?

    The severity of this vulnerability is high with a CVSS score of 8.6.

  • How does the Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability occur?

    This vulnerability occurs due to improper handling of TCP flows in Cisco Firepower Threat Defense (FTD) Software.

  • How can an attacker exploit the Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability?

    An attacker can exploit this vulnerability by triggering a denial of service (DoS) condition on the affected system.

  • Is there a fix for the Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability?

    There is currently no known fix for this vulnerability. It is recommended to follow the suggested mitigations provided by Cisco.

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