Date: 10 March 2016
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AUSCERT External Security Bulletin Redistribution
Cisco ASA Content Security and Control Security Services
Module Denial of Service Vulnerability
10 March 2016
AusCERT Security Bulletin Summary
Product: Cisco ASA 5500 Series CSC-SSM devices
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2016-1312
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Cisco Security Advisory
Cisco ASA Content Security and Control Security Services Module Denial of
Advisory ID: cisco-sa-20160309-csc
Published: 2016 March 9 16:00 GMT
Version 1.0: Final
Base - 7.8
No workarounds available
Cisco Bug IDs:
A vulnerability in the HTTPS inspection engine of the Cisco ASA Content
Security and Control Security Services Module (CSC-SSM) could allow an
unauthenticated, remote attacker to cause exhaustion of available memory,
system instability, and a reload of the affected system.
The vulnerability is due to improper handling of HTTPS packets transiting
through the affected system. An attacker could exploit this vulnerability by
sending HTTPS packets through the affected system at high rate.
Cisco has released software updates that address this vulnerability.
Workarounds that mitigate this vulnerability are not available.
This advisory is available at the following link:
Cisco ASA 5500 Series CSC-SSM devices running any 6.6 software release prior
to 6.6.1164.0 or without hotfix 1157 are affected by this vulnerability.
Cisco ASA 5500 Series CSC-SSM devices running software version 6.1, 6.2, or
6.3 are not affected by this vulnerability because these software versions do
not support HTTPS inspection.
Products Confirmed Not Vulnerable
Cisco ASA Software is not affected by this vulnerability.
No other Cisco products are currently known to be affected by this
Workarounds are not available.
When considering software upgrades, customers are advised to consult the Cisco
Security Advisories and Responses archive at http://www.cisco.com/go/psirt and
review subsequent advisories to determine exposure and a complete upgrade
In all cases, customers should ensure that the devices to be upgraded contain
sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Cisco ASA 5500 Series CSC-SSM software versions 6.6.1164.0 and later include
the fix for this vulnerability. Alternatively, affected customers can install
hotfix 1157, which is available by contacting Cisco TAC.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described
in this advisory.
This vulnerability was found during the resolution of support cases.
Version Description Section Status Date
1.0 Initial public release Final 2016-March-09
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
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