CVE-2020-23903

speex: divide by zero in read_samples() via crafted WAV file

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una vulnerabilidad de división por cero en la función static int read_samples de Speex versión v1.2, permite a atacantes causar una denegación de servicio (DoS) por medio de un archivo WAV diseñado

A divide-by-zero flaw was found in speex within the read_samples() at src/speexenc.c function. This flaw allows a malicious user to provide a crafted wav file and crash the speexenc utility, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

It was discovered that Speex incorrectly handled certain WAV files. An attacker could possibly use this issue to cause a denial of service.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-13 CVE Reserved
2021-11-10 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-369: Divide By Zero

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC
https://github.com/xiph/speex/issues/13	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LXCRAYNW5ESCE2PIGTUXZNZHNYFLJ6PX	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R3SEV2ZRR47GSD3M7O5PH4XEJMKJJNG2	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-23903	2022-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=2024250	2022-11-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Xiph Search vendor "Xiph"		Speex Search vendor "Xiph" for product "Speex"				1.2 Search vendor "Xiph" for product "Speex" and version "1.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected