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ESB-2016.0362.2 - UPDATE [Cisco] Cisco Advanced Malware Protection and Email Security Appliance: Unauthorised access - Remote/unauthenticated

Date: 15 February 2016

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2016.0362.2
           Cisco Advanced Malware Protection and Email Security
           Appliance Proxy Engine Security Bypass Vulnerability
                             15 February 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Advanced Malware Protection
                   Cisco Email Security Appliance
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2016-1315  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160211-esaamp

Comment: AusCERT recommends administrators limit external network access to the
         device.

Revision History:  February 15 2016: Corrected resolution and added workaround details
                   February 15 2016: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Advanced Malware Protection and Email Security Appliance Proxy Engine 
Security Bypass Vulnerability

Medium

Advisory ID:

cisco-sa-20160211-esaamp

Published:

2016 February 11 14:27 GMT

Version 1.0:

Final

CVSS Score:

Base - 5.0

Workarounds:

No workarounds available

Cisco Bug IDs:

CSCux45338

CSCux45950

CVE-2016-1315

CWE-20

Summary

A vulnerability in the proxy engine of the Cisco Advanced Malware Protection 
(AMP) and the Cisco Email Security Appliance (ESA) could allow an 
unauthenticated, remote attacker to bypass security restrictions.

The vulnerability is due to improper handling of malformed file methods. An 
attacker could exploit this vulnerability by encoding files within an email 
message. An exploit could allow the attacker to circumvent the AMPs or ESAs 
ability to prevent encoded files.

Cisco has not released software updates that address this vulnerability. 
Workarounds that address this vulnerability are not available.

This advisory is available at the following link: 
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160211-esaamp

Affected Products

Vulnerable Products

Cisco AMP is vulnerable when running on Cisco ESA releases 9.5.0-201, 
9.6.0-051, and 9.7.0-125.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this 
vulnerability.

Workarounds

Workarounds are not available.

Fixed Software

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 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.

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-20160211-esaamp

Revision History

Version Description Section Status Date

1.0 Initial public release Final 2016-February-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.

- --------------------------END INCLUDED TEXT--------------------

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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
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this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
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information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
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