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Cisco Firepower Detection Engine SSL Multiple DoS (cisco-sa-20170405-cfpw) (cisco-sa-20170405-cfpw1)

medium Nessus Plugin ID 100423

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Synopsis

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

Description

According to its version, the Cisco Firepower Threat Defense (FTD) software installed on the remote device is prior to 6.1.0.2 or else is 6.2.x prior to 6.2.0.1. It is, therefore, affected by multiple vulnerabilities :

 - A denial of service vulnerability exists in the detection engine reassembly of Secure Sockets Layer (SSL) packets due to improper handling of an SSL packet stream. An unauthenticated, remote attacker can exploit this, via a crafted SSL packet stream, to cause the Snort process to consume a high level of CPU resources.
 (CVE-2017-3885)

 - A denial of service vulnerability exists in the detection engine due to improper handling of an SSL packet in an established SSL connection. An unauthenticated, remote attacker can exploit this, via a crafted SSL packet stream, to cause the Snort process to restart, allowing traffic inspection to be bypassed or traffic to be dropped. (CVE-2017-3887)

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvc58563 and CSCvb62292.

See Also

http://www.nessus.org/u?6debfa41

http://www.nessus.org/u?5bc33ad5

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc58563

Plugin Details

Severity: Medium

ID: 100423

File Name: cisco-sa-20170405-cfpw.nasl

Version: 1.5

Type: local

Family: CISCO

Published: 5/25/2017

Updated: 7/6/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/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, cpe:/a:cisco:firepower_threat_defense

Required KB Items: Host/Cisco/ASA, Host/Cisco/ASA/model, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 4/5/2017

Vulnerability Publication Date: 4/5/2017

Reference Information

CVE: CVE-2017-3885, CVE-2017-3887

BID: 97451, 97453