What is the severity of CVE-2017-12213?

CVE-2017-12213 is classified as a high severity vulnerability due to its potential impact on network security.

How do I fix CVE-2017-12213?

To fix CVE-2017-12213, upgrade your Cisco IOS XE Software to the latest version that addresses this vulnerability.

Who is affected by CVE-2017-12213?

CVE-2017-12213 affects Cisco Catalyst 4000 Series Switches running vulnerable versions of Cisco IOS XE Software.

What is the main risk associated with CVE-2017-12213?

The main risk associated with CVE-2017-12213 is that it allows an unauthenticated adjacent attacker to bypass dynamic ACL assignment, leading to unauthorized access.

Is there a workaround for CVE-2017-12213?

There are no official workarounds for CVE-2017-12213; the primary mitigation is to apply the necessary software updates.

Vulnerability/
CVE-2017-12213

medium

4.3

CWE

287

7/9/2017

9/10/2019

CVE-2017-12213

First published: Thu Sep 07 2017(Updated: )

A vulnerability in the dynamic access control list (ACL) feature of Cisco IOS XE Software running on Cisco Catalyst 4000 Series Switches could allow an unauthenticated, adjacent attacker to cause dynamic ACL assignment to fail and the port to fail open. This could allow the attacker to pass traffic to the default VLAN of the affected port. The vulnerability is due to an uncaught error condition that may occur during the reassignment of the auth-default-ACL dynamic ACL to a switch port after 802.1x authentication fails. A successful exploit of this issue could allow a physically adjacent attacker to bypass 802.1x authentication and cause the affected port to fail open, allowing the attacker to pass traffic to the default VLAN of the affected switch port. Cisco Bug IDs: CSCvc72751.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS XE Web UI
Cisco Catalyst 4000

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Frequently Asked Questions

What is the severity of CVE-2017-12213?
CVE-2017-12213 is classified as a high severity vulnerability due to its potential impact on network security.
How do I fix CVE-2017-12213?
To fix CVE-2017-12213, upgrade your Cisco IOS XE Software to the latest version that addresses this vulnerability.
Who is affected by CVE-2017-12213?
CVE-2017-12213 affects Cisco Catalyst 4000 Series Switches running vulnerable versions of Cisco IOS XE Software.
What is the main risk associated with CVE-2017-12213?
The main risk associated with CVE-2017-12213 is that it allows an unauthenticated adjacent attacker to bypass dynamic ACL assignment, leading to unauthorized access.
Is there a workaround for CVE-2017-12213?
There are no official workarounds for CVE-2017-12213; the primary mitigation is to apply the necessary software updates.

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