CVE-2022-20767
Assigner: cisco
Published: 2022-04-27T00:00:00
State: PUBLISHED
affected: product: Cisco Firepower Threat Defense Software 
vendor: Cisco
versions: status: affected
version: n/a
datePublic: 2022-04-27T00:00:00
descriptions: value: A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of the DNS reputation enforcement rule. An attacker could exploit this vulnerability by sending crafted UDP packets through an affected device to force a buildup of UDP connections. A successful exploit could allow the attacker to cause traffic that is going through the affected device to be dropped, resulting in a DoS condition. Note: This vulnerability only affects Cisco FTD devices that are running Snort 3.
exploits: value: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. 
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.1
problemTypes: descriptions: cweId: CWE-399
description: CWE-399
type: CWE
source: advisory: cisco-sa-FTD-snort3-DOS-Aq38LVdM
defect: CSCwa21016
discovery: INTERNAL
title: Cisco Firepower Threat Defense Software DNS Enforcement Denial of Service Vulnerability