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CVE-2016-6439

UnknownEPSS 1.63%

Last modified

CVE-2016-6439 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoSecure Firewall Management Center5.3.0
CiscoSecure Firewall Management Center5.3.0.2
CiscoSecure Firewall Management Center5.3.0.3
CiscoSecure Firewall Management Center5.3.0.4
CiscoSecure Firewall Management Center5.3.1
CiscoSecure Firewall Management Center5.3.1.3
CiscoSecure Firewall Management Center5.3.1.4
CiscoSecure Firewall Management Center5.3.1.5
CiscoSecure Firewall Management Center5.3.1.6
CiscoSecure Firewall Management Center5.4.0
CiscoSecure Firewall Management Center5.4.0.2
CiscoSecure Firewall Management Center5.4.1
CiscoSecure Firewall Management Center5.4.1.1
CiscoSecure Firewall Management Center5.4.1.2
CiscoSecure Firewall Management Center5.4.1.3
CiscoSecure Firewall Management Center5.4.1.4
CiscoSecure Firewall Management Center5.4.1.5
CiscoSecure Firewall Management Center5.4.1.6
CiscoSecure Firewall Management Center5.4_base
CiscoSecure Firewall Management Center6.0.0
CiscoSecure Firewall Management Center6.0.0.0
CiscoSecure Firewall Management Center6.0.0.1
CiscoSecure Firewall Management Center6.0.1
CiscoSecure Firewall Management Center6.0_base

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-6439?
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.
How severe is CVE-2016-6439?
Severity scoring for CVE-2016-6439 is pending analysis. The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.
How do I fix CVE-2016-6439?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST