---
title: "CVE-2023-38313\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-38313?format=md
keywords: index, follow
---

# CVE-2023-38313

Publication date 17 November 2023

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2023-38313?format=md#impact-score)

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## Description

An issue was discovered in OpenNDS Captive Portal before 10.1.2. it has a
do\_binauth NULL pointer dereference that can be triggered with a crafted
GET HTTP request with a missing client redirect query string parameter.
Triggering this issue results in crashing openNDS (a Denial-of-Service
condition). The issue occurs when the client is about to be authenticated,
and can be triggered only when the BinAuth option is set. Affected OpenNDS
Captive Portal before version 10.1.2 fixed infixed in OpenWrt master,
OpenWrt 23.05 and OpenWrt 22.03 on28. August 2023 by updating OpenNDS to
version 10.1.3.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| opennds | 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-38313)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-38313)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-38313)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-38313)

### Other references

* <https://source.sierrawireless.com/-/media/support_downloads/security-bulletins/pdf/swi-psa-2023-006-r3.ashx>
* <https://github.com/openNDS/openNDS/commit/cd4004fc3cf79c0f2bc0ee98db30d225d0b79bc9 (v10.1.2)>
* <https://www.cve.org/CVERecord?id=CVE-2023-38313>