Cisco Firepower Threat Defense Software Web Services Interface DoS (cisco-sa-asafdt-webvpn-dos-tzPSYern)

high Nessus Plugin ID 161501


The remote device is missing a vendor-supplied security patch


A vulnerability in the web services interface for remote access VPN features of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a crafted HTTPS request to an affected device.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvz70595

See Also

Plugin Details

Severity: High

ID: 161501

File Name: cisco-sa-asafdt-webvpn-dos-tzPSYern-ftd.nasl

Version: 1.5

Type: local

Family: CISCO

Published: 5/25/2022

Updated: 5/26/2022

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2022-20745


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense

Exploit Ease: No known exploits are available

Patch Publication Date: 4/27/2022

Vulnerability Publication Date: 4/27/2022

Reference Information

CVE: CVE-2022-20745


CISCO-SA: cisco-sa-asafdt-webvpn-dos-tzPSYern

IAVA: 2022-A-0185

CWE: 20