---
title: "CVE-2020-23903\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-2020-23903?format=md
keywords: index, follow
---

# CVE-2020-23903

Publication date 10 November 2021

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-23903?format=md#impact-score)

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## Description

A Divide by Zero vulnerability in the function static int read\_samples of
Speex v1.2 allows attackers to cause a denial of service (DoS) via a
crafted WAV file.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| speex | 22.04 LTS jammy | Fixed 1.2~rc1.2-1.1ubuntu3 |
| 21.10 impish | Fixed 1.2~rc1.2-1.1ubuntu1.21.10.1 |
| 21.04 hirsute | Ignored end of life |
| 20.04 LTS focal | Fixed 1.2~rc1.2-1.1ubuntu1.20.04.1 |
| 18.04 LTS bionic | Fixed 1.2~rc1.2-1ubuntu2.1 |
| 16.04 LTS xenial | Fixed 1.2~rc1.2-1ubuntu1+esm1  Ubuntu Pro |
| 14.04 LTS trusty | Ignored end of standard support |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2020-23903?format=md#patch-details)

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### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| speex | * Upstrea:   [870ff84](https://github.com/xiph/speex/commit/870ff845b32f314aec0036641ffe18aba4916887) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-23903)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-23903)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-23903)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-23903)

### Related Ubuntu Security Notices (USN)

+ [USN-5280-1](https://usn.ubuntu.com/USN-5280-1)
+ Speex vulnerability
+ 10 February 2022

### Other references

* <https://github.com/xiph/speex/issues/13>
* <https://www.cve.org/CVERecord?id=CVE-2020-23903>