What is CVE-2020-3409?

CVE-2020-3409 is a vulnerability in the PROFINET feature of Cisco IOS Software and Cisco IOS XE Software that could allow an unauthenticated attacker to cause a denial of service (DoS) on the affected device.

What is the severity of CVE-2020-3409?

CVE-2020-3409 has a severity rating of 7.4 (high).

Which software versions are affected by CVE-2020-3409?

CVE-2020-3409 affects Cisco IOS Software 15.2(7)e and Cisco IOS XE Software 15.2(7)e.

How can an attacker exploit CVE-2020-3409?

An attacker can exploit CVE-2020-3409 by sending a specially crafted PROFINET packet to the target device, causing it to crash and reload.

Is there a fix available for CVE-2020-3409?

Yes, Cisco has released software updates to address the vulnerability. Please refer to the Cisco Security Advisory for more information.

Vulnerability/
CVE-2020-3409

high

7.4

CWE

400 20

24/9/2020

27/10/2022

CVE-2020-3409: Input Validation

First published: Thu Sep 24 2020(Updated: )

A vulnerability in the PROFINET feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause an affected device to crash and reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to insufficient processing logic for crafted PROFINET packets that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted PROFINET packets to an affected device for processing. A successful exploit could allow the attacker to cause the device to crash and reload, resulting in a DoS condition on the device.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS	=15.2\(7\)e
Cisco IOS XE	=15.2\(7\)e
Cisco Ie-4000-16gt4g-e
Cisco Ie-4000-16t4g-e
Cisco Ie-4000-4gc4gp4g-e
Cisco Ie-4000-4gs8gp4g-e
Cisco Ie-4000-4s8p4g-e
Cisco Ie-4000-4t4p4g-e
Cisco Ie-4000-4tc4g-e
Cisco Ie-4000-8gs4g-e
Cisco Ie-4000-8gt4g-e
Cisco Ie-4000-8gt8gp4g-e
Cisco Ie-4000-8s4g-e
Cisco Ie-4000-8t4g-e
Cisco IOS XE	=16.11.1a
Cisco IOS	=16.11.1a
Cisco Ie-3200-8p2s-e
Cisco Ie-3200-8t2s-e
Cisco Ie-3300-8p2s-a
Cisco Ie-3300-8p2s-e
Cisco Ie-3300-8t2s-a
Cisco Ie-3300-8t2s-e
Cisco Ie-3300-8t2x-a
Cisco Ie-3300-8t2x-e
Cisco Ie-3400-8p2s-a
Cisco Ie-3400-8p2s-e
Cisco Ie-3400-8t2s-e
Cisco Iem-3300-14t2s
Cisco Iem-3300-16p
Cisco Iem-3300-16t
Cisco Iem-3300-6t2s
Cisco Iem-3300-8p
Cisco Iem-3300-8s
Cisco Iem-3300-8t
Cisco Iem-3400-8p
Cisco Iem-3400-8s
Cisco Iem-3400-8t

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-profinet-J9QMCHPB

Frequently Asked Questions

What is CVE-2020-3409?
CVE-2020-3409 is a vulnerability in the PROFINET feature of Cisco IOS Software and Cisco IOS XE Software that could allow an unauthenticated attacker to cause a denial of service (DoS) on the affected device.
What is the severity of CVE-2020-3409?
CVE-2020-3409 has a severity rating of 7.4 (high).
Which software versions are affected by CVE-2020-3409?
CVE-2020-3409 affects Cisco IOS Software 15.2(7)e and Cisco IOS XE Software 15.2(7)e.
How can an attacker exploit CVE-2020-3409?
An attacker can exploit CVE-2020-3409 by sending a specially crafted PROFINET packet to the target device, causing it to crash and reload.
Is there a fix available for CVE-2020-3409?
Yes, Cisco has released software updates to address the vulnerability. Please refer to the Cisco Security Advisory for more information.