Cisco Firepower Threat Defense Software Packet Flood DoS (cisco-sa-ftd-dos-N2vQZASR)

Medium Nessus Plugin ID 137406


The remote device is missing a vendor-supplied security patch.


According to its self-reported version, Cisco Firepower Threat Defense (FTD) Software is affected by a denial of service (DoS) vulnerability in the packet processing functionality due to inefficient memory management. An unauthenticated, remote attacker can exploit this vulnerability by sending a high rate of IPv4 or IPv6 traffic through an affected device to cause a memory exhaustion condition.

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

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


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvo80853

See Also

Plugin Details

Severity: Medium

ID: 137406

File Name: cisco-sa-ftd-dos-N2vQZASR.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 2020/06/17

Updated: 2020/06/23

Dependencies: 128052

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2020-3255

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense, Host/Cisco/Firepower

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/05/06

Vulnerability Publication Date: 2020/05/06

Reference Information

CVE: CVE-2020-3255


CISCO-SA: cisco-sa-ftd-dos-N2vQZASR

IAVA: 2020-A-0205

CWE: 400