CVE-2017-12353
First published: Thu Nov 30 2017(Updated: )
A vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to improper error handling of a malformed MIME header in an email attachment. An attacker could exploit this vulnerability by sending an email with a crafted MIME attachment. For example, a successful exploit could allow the attacker to bypass configured user filters to drop the email. The malformed MIME headers may not be RFC compliant. However, some mail clients could still allow users to access the attachment, which may not have been properly filtered by the device. Cisco Bug IDs: CSCvf44666.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco AsyncOS |
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Reference Links
Frequently Asked Questions
What is CVE-2017-12353?
CVE-2017-12353 is a vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA).
How does CVE-2017-12353 affect Cisco AsyncOS?
CVE-2017-12353 allows an unauthenticated, remote attacker to bypass configured user filters on Cisco AsyncOS.
What is the severity level of CVE-2017-12353?
The severity level of CVE-2017-12353 is medium.
How can I fix CVE-2017-12353?
To fix CVE-2017-12353, it is recommended to apply the necessary security patches provided by Cisco.
Where can I find more information about CVE-2017-12353?
You can find more information about CVE-2017-12353 in the references provided: [http://www.securityfocus.com/bid/102002](http://www.securityfocus.com/bid/102002), [http://www.securitytracker.com/id/1039917](http://www.securitytracker.com/id/1039917), [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-esa](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-esa)
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