---
title: "CVE-2020-23904\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-2020-23904?format=md
keywords: index, follow
---

# CVE-2020-23904

Publication date 10 November 2021

Last updated 4 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-2020-23904?format=md#impact-score)

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## Description

A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to
cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor
states "I cannot reproduce it" and it "is a demo program.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2020-23904?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| speex | 22.04 LTS jammy | Ignored not a bug |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.04 LTS focal | Ignored end of standard support, was ignored [not a bug] |
| 18.04 LTS bionic | Ignored end of standard support |
| 16.04 LTS xenial | Ignored end of standard support |
| 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)

## Notes

---

### [leosilva](https://launchpad.net/~leosilva)

from upstream none was able to reproduce hence that issue was closed.
Marking it as ignored

## 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-2020-23904)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-23904)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-23904)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-23904)

### Other references

* <https://github.com/xiph/speex/issues/14>
* <https://www.cve.org/CVERecord?id=CVE-2020-23904>