What is CVE-2023-38320?

CVE-2023-38320 is an issue discovered in OpenNDS Captive Portal before version 10.1.2, which can be triggered by a crafted GET HTTP request without a User-Agent header, leading to a crash and Denial-of-Service condition.

How does CVE-2023-38320 impact OpenNDS Captive Portal?

CVE-2023-38320 triggers a NULL pointer dereference in OpenNDS Captive Portal, causing a crash and resulting in a Denial-of-Service condition.

What is the severity of CVE-2023-38320?

CVE-2023-38320 has a severity rating of high, with a CVSS score of 7.5.

How can I fix CVE-2023-38320 in OpenNDS Captive Portal?

To fix CVE-2023-38320, update OpenNDS Captive Portal to version 10.1.2 or later.

Where can I find more information about CVE-2023-38320?

You can find more information about CVE-2023-38320 on the [OpenNDS releases page](https://github.com/openNDS/openNDS/releases/tag/v10.1.2).

Vulnerability/
CVE-2023-38320

high

7.5

CWE

476

17/11/2023

20/6/2024

CVE-2023-38320: Null Pointer Dereference

First published: Fri Nov 17 2023(Updated: )

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a show_preauthpage NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing User-Agent header. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). This problem was fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
OpenNDS Captive Portal	<10.1.2

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Frequently Asked Questions

What is CVE-2023-38320?
CVE-2023-38320 is an issue discovered in OpenNDS Captive Portal before version 10.1.2, which can be triggered by a crafted GET HTTP request without a User-Agent header, leading to a crash and Denial-of-Service condition.
How does CVE-2023-38320 impact OpenNDS Captive Portal?
CVE-2023-38320 triggers a NULL pointer dereference in OpenNDS Captive Portal, causing a crash and resulting in a Denial-of-Service condition.
What is the severity of CVE-2023-38320?
CVE-2023-38320 has a severity rating of high, with a CVSS score of 7.5.
How can I fix CVE-2023-38320 in OpenNDS Captive Portal?
To fix CVE-2023-38320, update OpenNDS Captive Portal to version 10.1.2 or later.
Where can I find more information about CVE-2023-38320?
You can find more information about CVE-2023-38320 on the [OpenNDS releases page](https://github.com/openNDS/openNDS/releases/tag/v10.1.2).

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vendor/opennds
canonical/opennds captive portal

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