Cisco Email Security Appliance File Type Filtering Vulnerability

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Updated:July 27, 2016
Document ID:1469635595737249

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Medium
Advisory ID:
cisco-sa-20160727-esa
Published:
2016 July 27 16:00  GMT
Version 1.0:
Final
CVSS Score:
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCuz14932
CVSS Score:
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCuz14932
CVE-2016-1461
CWE-20

  • A vulnerability in the email message filtering feature of Cisco AsyncOS for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an ESA to fail to detect and act upon a specific type of file that is attached to an email message.

    The vulnerability is due to improper application of message filtering rules to email attachments that contain a specific type of file and are submitted to an affected appliance. An attacker could exploit this vulnerability by sending an email message with a crafted attachment to an affected appliance. A successful exploit could allow the attacker to cause the ESA to fail to detect and act upon possible malware in the email attachment.

    Cisco has not 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-20160727-esa

  • Vulnerable Products

    This vulnerability affects all releases of Cisco AsyncOS for Cisco ESA that precede the first fixed release.

    Products Confirmed Not Vulnerable

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

  • There are no workarounds that address this vulnerability.

  • 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.

  • 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.

  • To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.



  • Version Description Section Status Date
    1.0 Initial public release. — Final 2016-July-27
    Show Less


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  • To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.