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AUSCERT External Security Bulletin Redistribution
Cisco FirePOWER 7000 and Cisco FirePOWER 8000 Series
Inspection Engine Stall Vulnerability
29 September 2015
AusCERT Security Bulletin Summary
Product: Cisco FirePOWER
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2015-6307
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Cisco FirePOWER 7000 and Cisco FirePOWER 8000 Series Inspection Engine Stall
Threat Type: CWE-399: Resource Management Errors
IntelliShield ID: 41131
First Published: 2015 September 25 15:19 GMT
Last Published: 2015 September 25 15:19 GMT
Port: Not available
Urgency: Unlikely Use
Severity: Mild Damage
CVSS Base: 6.1
CVSS Temporal: 5.0
Version Summary: Cisco FirePOWER 7000 Series and Cisco FirePOWER 8000
Series devices contain a vulnerability that could allow an unauthenticated,
adjacent attacker to bypass security restrictions or cause a denial of service
condition. Updates are available.
A vulnerability in FireSIGHT System Software for Cisco FirePOWER 7000 Series
and Cisco FirePOWER 8000 Series devices could allow an unauthenticated,
adjacent attacker to cause the inspection engine to stop processing packets.
Depending on the affected system configuration, this may cause traffic not to
be inspected or to be dropped.
The vulnerability is due to improper parsing of crafted packets. An attacker
could exploit this vulnerability by sending crafted packets to the affected system.
Cisco has confirmed the vulnerability and released software updates.
At the time this alert was first published, Cisco FireSIGHT System Software
Release 18.104.22.168 running on Cisco FirePOWER 7000 and 8000 Series devices was
vulnerable. Later releases of Cisco FireSIGHT System Software may also be
To exploit this vulnerability, an attacker must have access to the same
broadcast or collision domain as the targeted device. This access requirement
may reduce the likelihood of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists;
however, the code is not known to be publicly available.
Cisco Sourcefire 7000 and Cisco Sourcefire 8000 Series devices have been
renamed Cisco FirePOWER 7000 and Cisco FirePOWER 8000 Series.
Cisco has released bug ID CSCuu10871 for registered users, which contains
additional details and an up-to-date list of affected product versions.
An unauthenticated, adjacent attacker could exploit this vulnerability to
cause the inspection engine on an affected device to stop processing
packets, which could cause traffic to bypass inspection or be dropped.
Technical information is not available.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software
Center at the following link: Cisco. Cisco customers without contracts can
obtain upgrades by contacting the Cisco Technical Assistance Center at
1-800-553-2447 or 1-408-526-7209 or via email at email@example.com.
The security vulnerability applies to the following combinations of products.
Cisco Cisco FireSIGHT System Software 5.4 .0.1
The urgency and severity ratings of this alert are not tailored to individual
users; users may value alerts differently based upon their network
configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN,
ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR
WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR
MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT
AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF
PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE ALERTS AT ANY TIME.
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