What is CVE-2023-20251?

CVE-2023-20251 is a vulnerability in the Cisco Wireless LAN Controller (WLC) AireOS Software that could allow an unauthenticated attacker to cause memory leaks and device reboot.

How does CVE-2023-20251 affect Cisco Mobility Express Software?

Cisco Mobility Express Software is affected by CVE-2023-20251 as it uses the Cisco WLC AireOS Software.

What is the severity of CVE-2023-20251?

The severity of CVE-2023-20251 is medium with a CVSS score of 5.3.

What is the Common Weakness Enumeration (CWE) ID for CVE-2023-20251?

The Common Weakness Enumeration (CWE) ID for CVE-2023-20251 is CWE-119.

How can I fix CVE-2023-20251?

To fix CVE-2023-20251, ensure that you are running a non-vulnerable version of the Cisco WLC AireOS Software and keep it up to date with the latest security patches provided by Cisco.

Vulnerability/
CVE-2023-20251

medium

6.1

CWE

119 401

27/9/2023

2/8/2024

CVE-2023-20251: Buffer Overflow

First published: Wed Sep 27 2023(Updated: )

A vulnerability in the memory buffer of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause memory leaks that could eventually lead to a device reboot. This vulnerability is due to memory leaks caused by multiple clients connecting under specific conditions. An attacker could exploit this vulnerability by causing multiple wireless clients to attempt to connect to an access point (AP) on an affected device. A successful exploit could allow the attacker to cause the affected device to reboot after a significant amount of time, resulting in a denial of service (DoS) condition.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Mobility Express
Cisco WLC AireOS	>=8.10.150<8.10.190.0
All of
Cisco Mobility Express
Cisco WLC AireOS	>=8.10.150<8.10.190.0

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Reference Links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3

Frequently Asked Questions

What is CVE-2023-20251?
CVE-2023-20251 is a vulnerability in the Cisco Wireless LAN Controller (WLC) AireOS Software that could allow an unauthenticated attacker to cause memory leaks and device reboot.
How does CVE-2023-20251 affect Cisco Mobility Express Software?
Cisco Mobility Express Software is affected by CVE-2023-20251 as it uses the Cisco WLC AireOS Software.
What is the severity of CVE-2023-20251?
The severity of CVE-2023-20251 is medium with a CVSS score of 5.3.
What is the Common Weakness Enumeration (CWE) ID for CVE-2023-20251?
The Common Weakness Enumeration (CWE) ID for CVE-2023-20251 is CWE-119.
How can I fix CVE-2023-20251?
To fix CVE-2023-20251, ensure that you are running a non-vulnerable version of the Cisco WLC AireOS Software and keep it up to date with the latest security patches provided by Cisco.

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