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Cisco Security Advisory: Cisco Firepower Detection Engine HTTP Denial of 
Service Vulnerability

Advisory ID: cisco-sa-20161019-fpsnort

Revision 1.0

For Public Release 2016 October 19 16:00 UTC (GMT)

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Summary
=======

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.

Cisco has released software updates that address this vulnerability. There are 
no workarounds that address this vulnerability.
 
This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-fpsnort

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