What is the severity of CVE-2024-20309?

CVE-2024-20309 has a high severity rating due to its potential impact on device availability.

How do I fix CVE-2024-20309?

To mitigate CVE-2024-20309, upgrade to the latest version of Cisco IOS XE Software that addresses this vulnerability.

Who is affected by CVE-2024-20309?

Authenticated, local attackers can exploit CVE-2024-20309 on devices running affected versions of Cisco IOS XE Software.

What are the symptoms of CVE-2024-20309?

Devices affected by CVE-2024-20309 may reload unexpectedly or stop responding due to improper handling of ingress traffic.

Is CVE-2024-20309 remotely exploitable?

CVE-2024-20309 is not remotely exploitable as it requires local authentication to be attacked.

Vulnerability/
CVE-2024-20309

medium

5.6

CWE

828

27/3/2024

9/8/2024

CVE-2024-20309

First published: Wed Mar 27 2024(Updated: )

A vulnerability in auxiliary asynchronous port (AUX) functions of Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload or stop responding. This vulnerability is due to the incorrect handling of specific ingress traffic when flow control hardware is enabled on the AUX port. An attacker could exploit this vulnerability by reverse telnetting to the AUX port and sending specific data after connecting. A successful exploit could allow the attacker to cause the device to reset or stop responding, resulting in a denial of service (DoS) condition.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS and IOS XE Software

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Reference Links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aux-333WBz8f

Frequently Asked Questions

What is the severity of CVE-2024-20309?
CVE-2024-20309 has a high severity rating due to its potential impact on device availability.
How do I fix CVE-2024-20309?
To mitigate CVE-2024-20309, upgrade to the latest version of Cisco IOS XE Software that addresses this vulnerability.
Who is affected by CVE-2024-20309?
Authenticated, local attackers can exploit CVE-2024-20309 on devices running affected versions of Cisco IOS XE Software.
What are the symptoms of CVE-2024-20309?
Devices affected by CVE-2024-20309 may reload unexpectedly or stop responding due to improper handling of ingress traffic.
Is CVE-2024-20309 remotely exploitable?
CVE-2024-20309 is not remotely exploitable as it requires local authentication to be attacked.

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