Cisco FXOS Software Pluggable Authentication Module DoS (cisco-sa-20191002-ftd-fpmc-dos)

medium Nessus Plugin ID 134450


The remote device is missing a vendor-supplied security patch


According to its self-reported version, Cisco FXOS Software is affected by a vulnerability in the configuration of the Pluggable Authentication Module (PAM) due to improper resource management in the context of user session management. An authenticated, remote attacker can exploit this, by connecting to an affected system and performing many simultaneous successful Secure Shell (SSH) logins, in order to exhaust system resources and cause a denial of service (DoS) condition.

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


Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvm92401, CSCvn83385

See Also

Plugin Details

Severity: Medium

ID: 134450

File Name: cisco-sa-20191002-fxos.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 3/13/2020

Updated: 7/14/2020

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

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

CVSS Score Source: CVE-2019-12700


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:cisco:fxos

Required KB Items: installed_sw/FXOS

Exploit Ease: No known exploits are available

Patch Publication Date: 10/2/2019

Vulnerability Publication Date: 10/2/2019

Reference Information

CVE: CVE-2019-12700

CISCO-BUG-ID: CSCvm92401, CSCvn83385

CISCO-SA: cisco-sa-20191002-ftd-fpmc-dos

IAVA: 2019-A-0370