Cisco ASA 5.4.1.5/6.0/6.0.0.1 on 5500-X Firepower Detection Engine HTTP resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

A vulnerability, which was classified as critical, was found in Cisco ASA 5.4.1.5/6.0/6.0.0.1 on 5500-X (Firewall Software). Affected is an unknown code block of the component Firepower Detection Engine. The manipulation as part of a HTTP leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability.

The weakness was published 10/19/2016 with Cisco as cisco-sa-20161019-fpsnort / CSCux61630 as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2016-6439 since 07/26/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

A vulnerability in the detection engine reassembly of HTTP packets for Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the Snort process unexpectedly restarting. The vulnerability is due to improper handling of an HTTP packet stream. An attacker could exploit this vulnerability by sending a crafted HTTP packet stream to the detection engine on the targeted device. An exploit could allow the attacker to cause a DoS condition if the Snort process restarts and traffic inspection is bypassed or traffic is dropped.

The vulnerability scanner Nessus provides a plugin with the ID 94469 (Cisco Firepower Packet Inspection Engine HTTP Stream DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94469), SecurityFocus (BID 93787†) and SecurityTracker (ID 1037061†). Further details are available at tools.cisco.com. Similar entries are available at VDB-92999 and VDB-92998. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Not Affected

  • Cisco ASA
  • Cisco Firepower Management Center
  • CIsco IPS Software
  • Snort IPS for Integrated Services Routers

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 94469
Nessus Name: Cisco Firepower Packet Inspection Engine HTTP Stream DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881575
OpenVAS Name: Cisco Firepower Detection Engine HTTP Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

07/26/2016 🔍
10/19/2016 +85 days 🔍
10/19/2016 +0 days 🔍
10/19/2016 +0 days 🔍
10/19/2016 +0 days 🔍
10/20/2016 +1 days 🔍
10/27/2016 +7 days 🔍
11/02/2016 +6 days 🔍
11/26/2024 +2946 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20161019-fpsnort / CSCux61630
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6439 (🔍)
GCVE (CVE): GCVE-0-2016-6439
GCVE (VulDB): GCVE-100-93000
SecurityFocus: 93787 - Multiple Cisco Products CVE-2016-6439 Denial of Service Vulnerability
SecurityTracker: 1037061

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/20/2016 09:01 AM
Updated: 11/26/2024 06:18 PM
Changes: 10/20/2016 09:01 AM (75), 05/14/2019 04:42 PM (12), 09/28/2022 08:49 AM (3), 11/26/2024 06:18 PM (25)
Complete: 🔍
Cache ID: 18:1A4:40

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