What is the severity of CVE-2019-12706?

The severity of CVE-2019-12706 is high with a CVSS score of 7.5.

How can I fix CVE-2019-12706?

To fix CVE-2019-12706, Cisco recommends upgrading the affected software to version 13.5.0 or later.

Where can I find more information about CVE-2019-12706?

You can find more information about CVE-2019-12706 on the Cisco Security Advisory website.

Vulnerability/
CVE-2019-12706

high

7.5

CWE

2/10/2019

19/11/2024

CVE-2019-12706: Cisco Email Security Appliance Filter Bypass Vulnerability

Q: What is CVE-2019-12706?

CVE-2019-12706 is a vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA).

Q: How does CVE-2019-12706 affect Cisco Email Security Appliance?

CVE-2019-12706 allows an unauthenticated, remote attacker to bypass the configured user filters on an affected device.

First published: Wed Oct 02 2019(Updated: )

A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the configured user filters on an affected device. The vulnerability exists because the affected software insufficiently validates certain incoming SPF messages. An attacker could exploit this vulnerability by sending a custom SPF packet to an affected device. A successful exploit could allow the attacker to bypass the configured header filters, which could allow malicious content to pass through the device.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Email Security Appliance Firmware	<13.5.0

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-esa-bypass

Frequently Asked Questions

What is CVE-2019-12706?
CVE-2019-12706 is a vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA).
What is the severity of CVE-2019-12706?
The severity of CVE-2019-12706 is high with a CVSS score of 7.5.
How does CVE-2019-12706 affect Cisco Email Security Appliance?
CVE-2019-12706 allows an unauthenticated, remote attacker to bypass the configured user filters on an affected device.
How can I fix CVE-2019-12706?
To fix CVE-2019-12706, Cisco recommends upgrading the affected software to version 13.5.0 or later.
Where can I find more information about CVE-2019-12706?
You can find more information about CVE-2019-12706 on the Cisco Security Advisory website.

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