7.8
CVSSv2

CVE-2022-20767

Published: 03/05/2022 Updated: 07/11/2023
CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 695
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Summary

A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote malicious user 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 malicious user 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.

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cisco firepower threat defense 7.1.0

cisco firepower threat defense

Vendor Advisories

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 ...