8.6
CWE
770
Advisory Published
Updated

CVE-2022-20757: Cisco Firepower Threat Defense Software Denial of Service Vulnerability

First published: Tue May 03 2022(Updated: )

A vulnerability in the connection handling function in Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper traffic handling when platform limits are reached. An attacker could exploit this vulnerability by sending a high rate of UDP traffic through an affected device. A successful exploit could allow the attacker to cause all new, incoming connections to be dropped, resulting in a DoS condition.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Firepower Threat Defense<6.4.0.15
Cisco Firepower Threat Defense>=6.5.0<6.6.5.2
Cisco Firepower Threat Defense>=6.7.0<7.0.2
Cisco Firepower Threat Defense=7.1.0

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Frequently Asked Questions

  • What is CVE-2022-20757?

    CVE-2022-20757 is a vulnerability in the connection handling function in Cisco Firepower Threat Defense (FTD) Software that allows an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

  • How does CVE-2022-20757 affect Cisco Firepower Threat Defense Software?

    CVE-2022-20757 affects Cisco Firepower Threat Defense (FTD) Software versions up to 6.4.0.15, versions between 6.5.0 and 6.6.5.2, and versions between 6.7.0 and 7.0.2, including version 7.1.0.

  • What is the severity of CVE-2022-20757?

    CVE-2022-20757 has a severity rating of high with a CVSS score of 7.5.

  • How can an attacker exploit CVE-2022-20757?

    An unauthenticated, remote attacker can exploit CVE-2022-20757 by sending specially crafted traffic to the vulnerable device, causing a denial of service (DoS) condition.

  • Is there a fix for CVE-2022-20757?

    Yes, Cisco has released software updates to address the vulnerability. It is recommended to update to the latest available version of Cisco Firepower Threat Defense (FTD) Software.

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