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Category:   Device (Embedded Server/Appliance)  >   Cisco Email Security Appliance Vendors:   Cisco
Cisco Email Security Appliance MIME Header Scanning Bug Lets Remote Users Bypass Security Restrictions on the Target System
SecurityTracker Alert ID:  1039917
SecurityTracker URL:
CVE Reference:   CVE-2017-12353   (Links to External Site)
Date:  Nov 30 2017
Impact:   Host/resource access via network
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco Email Security Appliance. A remote user can bypass security controls on the target system.

A remote user can send an email attachment with a specially crafted MIME header to exploit a flaw in the Cisco AsyncOS MIME scanner and bypass configured user filters on the target device.

The vendor has assigned bug ID CSCvf44666 to this vulnerability.

Mai Ngoc Duong reported this vulnerability.

Impact:   A remote user can bypass the MIME scanner security controls on the target system.
Solution:   No solution was available at the time of this entry.

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error

Message History:   None.

 Source Message Contents



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