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                                 CERT-Renater

                     Note d'Information No. 2016/VULN265
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DATE                : 23/06/2016

HARDWARE PLATFORM(S): Cisco Email Security Appliance.

OPERATING SYSTEM(S): Cisco Email Security Appliance software version
                                   prior to 9.7.0-125.

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http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160622-esa
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Cisco Security Advisory


Cisco Email Security Appliance .zip File Scanning Security Bypass
Vulnerability


Medium

Advisory ID:

cisco-sa-20160622-esa

Published:

2016 June 22 14:00 GMT

Version 1.0:

Final

CVSS Score:

Base - 4.3

Workarounds:

No workarounds available

Cisco Bug IDs:

CSCuy39210

CVE-2016-1438

CWE-20

Summary

A vulnerability in the anti-spam filter of the Cisco Email Security
Appliance (ESA) could allow an unauthenticated, remote attacker to
bypass anti-spam filtering functionality on an affected system.

The vulnerability is due to improper handling of content in .zip
files. An attacker could exploit this vulnerability by sending a
malicious .zip file that contains embedded executable content,
which could be used to cause additional harm to the system.

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-20160622-esa


Affected Products

Vulnerable Products

This vulnerability affects Cisco Email Security Appliance Release
9.7.0-125.

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-20160622-esa


Revision History

Version Description 		Section Status 	Date

1.0 	Initial public release. 	Final 	2016-June-22

Legal Disclaimer

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INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT
IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE
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important information or contain factual errors. The information
in this document is intended for end users of Cisco products.


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