high
7.5
CWE
399
Advisory Published
Updated

CVE-2016-6439

First published: Thu Oct 27 2016(Updated: )

A vulnerability in the detection engine reassembly of HTTP packets for Cisco Firepower System Software before 6.0.1 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.

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Secure Firewall Management Center=5.3.0
Cisco Secure Firewall Management Center=5.3.0.2
Cisco Secure Firewall Management Center=5.3.0.3
Cisco Secure Firewall Management Center=5.3.0.4
Cisco Secure Firewall Management Center=5.3.1
Cisco Secure Firewall Management Center=5.3.1.3
Cisco Secure Firewall Management Center=5.3.1.4
Cisco Secure Firewall Management Center=5.3.1.5
Cisco Secure Firewall Management Center=5.3.1.6
Cisco Secure Firewall Management Center=5.4.0
Cisco Secure Firewall Management Center=5.4.0.2
Cisco Secure Firewall Management Center=5.4.1
Cisco Secure Firewall Management Center=5.4.1.1
Cisco Secure Firewall Management Center=5.4.1.2
Cisco Secure Firewall Management Center=5.4.1.3
Cisco Secure Firewall Management Center=5.4.1.4
Cisco Secure Firewall Management Center=5.4.1.5
Cisco Secure Firewall Management Center=5.4.1.6
Cisco Secure Firewall Management Center=5.4_base
Cisco Secure Firewall Management Center=6.0.0
Cisco Secure Firewall Management Center=6.0.0.0
Cisco Secure Firewall Management Center=6.0.0.1
Cisco Secure Firewall Management Center=6.0.1
Cisco Secure Firewall Management Center=6.0_base
Cisco Firepower Management Center Software=5.3.0
Cisco Firepower Management Center Software=5.3.0.2
Cisco Firepower Management Center Software=5.3.0.3
Cisco Firepower Management Center Software=5.3.0.4
Cisco Firepower Management Center Software=5.3.1
Cisco Firepower Management Center Software=5.3.1.3
Cisco Firepower Management Center Software=5.3.1.4
Cisco Firepower Management Center Software=5.3.1.5
Cisco Firepower Management Center Software=5.3.1.6
Cisco Firepower Management Center Software=5.4.0
Cisco Firepower Management Center Software=5.4.0.2
Cisco Firepower Management Center Software=5.4.1
Cisco Firepower Management Center Software=5.4.1.1
Cisco Firepower Management Center Software=5.4.1.2
Cisco Firepower Management Center Software=5.4.1.3
Cisco Firepower Management Center Software=5.4.1.4
Cisco Firepower Management Center Software=5.4.1.5
Cisco Firepower Management Center Software=5.4.1.6
Cisco Firepower Management Center Software=5.4_base
Cisco Firepower Management Center Software=6.0.0
Cisco Firepower Management Center Software=6.0.0.0
Cisco Firepower Management Center Software=6.0.0.1
Cisco Firepower Management Center Software=6.0.1
Cisco Firepower Management Center Software=6.0_base

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-6439?

    The severity of CVE-2016-6439 is classified as a High risk due to its potential to cause denial of service.

  • How do I fix CVE-2016-6439?

    To mitigate CVE-2016-6439, upgrade to Cisco Firepower System Software version 6.0.1 or later.

  • Who is affected by CVE-2016-6439?

    CVE-2016-6439 affects multiple versions of Cisco Secure Firewall Management Center and Cisco Firepower Management Center Software before version 6.0.1.

  • What type of attack can CVE-2016-6439 enable?

    CVE-2016-6439 allows an unauthenticated, remote attacker to cause a denial of service condition.

  • What components are involved in CVE-2016-6439?

    CVE-2016-6439 involves the detection engine reassembly of HTTP packets within the Cisco Firepower System Software.

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