Cisco Firepower Packet Inspection Engine HTTP Stream DoS

high Nessus Plugin ID 94469


The packet inspection software on the remote host is affected by a denial of service vulnerability.


The version of Cisco Firepower System running on the remote host is affected by a denial of service vulnerability in the packet inspection engine due to improper handling of certain HTTP packet streams. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP packet stream, to cause the Snort process to restart, allowing traffic inspection to be bypassed or traffic to be dropped.


Upgrade to Cisco Firepower System version / / 6.0.1 / 6.1.0 or later.

See Also

Plugin Details

Severity: High

ID: 94469

File Name: cisco-sa-20161019-fpsnort.nasl

Version: 1.8

Type: local

Family: CISCO

Published: 11/2/2016

Updated: 7/9/2018

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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


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

Vulnerability Information

CPE: cpe:/a:cisco:firepower_management_center

Required KB Items: Host/Cisco/firepower/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2016

Vulnerability Publication Date: 10/19/2016

Reference Information

CVE: CVE-2016-6439

BID: 93787

CISCO-SA: cisco-sa-20161019-fpsnort