CVE-2023-38320: Null Pointer Dereference
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a showpreauthpage 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.
Affected Software
Event History
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).