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AUSCERT External Security Bulletin Redistribution
ESB-2016.1708
Cisco Adaptive Security Appliance Access Control List ICMP
Echo Request Code Filtering Vulnerability
12 July 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Adaptive Security Appliance
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-1445
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160711-asa
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Cisco Security Advisory
Cisco Adaptive Security Appliance Access Control List ICMP Echo Request Code
Filtering Vulnerability
Medium
Advisory ID:
cisco-sa-20160711-asa
Published:
2016 July 11 09:30 GMT
Version 1.0:
Final
CVSS Score:
Base - 4.3
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCuy25163
CVE-2016-1445
CWE-20
Summary
A vulnerability in the Cisco Adaptive Security Appliance (ASA) Software
implementation of access control list (ACL) permit and deny filters for ICMP
Echo Reply messages could allow an unauthenticated, remote attacker to bypass
ACL configurations for an affected device. ICMP traffic that should be denied
may instead be allowed through an affected device.
The vulnerability is due to the implementation of ACL-based filters for ICMP
Echo Requests and the range of ICMP Echo Request subtypes. An attacker could
exploit this vulnerability by sending ICMP Echo Request traffic to an affected
device. A successful exploit could allow the attacker to bypass ACL
configurations for the device, which could allow traffic that should be denied
to instead be allowed through the device.
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-20160711-asa
Affected Products
Vulnerable Products
This vulnerability affects Cisco Adaptive Security Appliance (ASA) Software
Releases 8.2 through 9.4.3.3.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
Cisco provides information about fixed software in Cisco bugs, which are
accessible through the Cisco Bug Search Tool.
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
solution.
In all cases, customers should ensure that the devices to upgrade 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.
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.
URL
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160711-asa
Revision History
Version Description Section Status Date
1.0 Initial public release. Final 2016-July-11
Legal Disclaimer
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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