CVE-2020-23903 Denial of service in n/a

Medium 5.5 Published 10 Nov 2021 Updated 4 Aug 2024

Attackers can cause a denial of service in applications using the Speex library by providing a crafted WAV file that triggers a divide-by-zero error.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2020-23903?

CVE-2020-23903 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 10 Nov 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-369

Which versions are affected by CVE-2020-23903?

It affects 2 products.

Linux distribution packages (21)

`speex` AlmaLinux:9	All versions	`1.2.0-11.el9`
`speex-devel` AlmaLinux:9	All versions	`1.2.0-11.el9`
`speex` Red Hat:enterprise_linux:9::appstream	All versions	`0:1.2.0-11.el9`
`speex-debuginfo` Red Hat:enterprise_linux:9::appstream	All versions	`0:1.2.0-11.el9`
`speex-debugsource` Red Hat:enterprise_linux:9::appstream	All versions	`0:1.2.0-11.el9`
`speex-tools-debuginfo` Red Hat:enterprise_linux:9::appstream	All versions	`0:1.2.0-11.el9`
`speex-debuginfo` Red Hat:enterprise_linux:9::crb	All versions	`0:1.2.0-11.el9`
`speex-debugsource` Red Hat:enterprise_linux:9::crb	All versions	`0:1.2.0-11.el9`
`speex-devel` Red Hat:enterprise_linux:9::crb	All versions	`0:1.2.0-11.el9`
`speex-tools-debuginfo` Red Hat:enterprise_linux:9::crb	All versions	`0:1.2.0-11.el9`
`speex` Rocky Linux:9	All versions	`0:1.2.0-11.el9`
`speex` SUSE:Linux Enterprise Module for Basesystem 15 SP2	All versions	`1.2-3.3.1`
`speex` SUSE:Linux Enterprise Module for Basesystem 15 SP3	All versions	`1.2-3.3.1`
`speex` SUSE:Linux Enterprise Module for Package Hub 15 SP2	All versions	`1.2-3.3.1`
`speex` SUSE:Linux Enterprise Module for Package Hub 15 SP3	All versions	`1.2-3.3.1`
`speex` SUSE:Linux Enterprise Server 12 SP5	All versions	`1.1.999_1.2rc1-24.3.1`
`speex` SUSE:Linux Enterprise Server for SAP Applications 12 SP5	All versions	`1.1.999_1.2rc1-24.3.1`
`speex` SUSE:Linux Enterprise Software Development Kit 12 SP5	All versions	`1.1.999_1.2rc1-24.3.1`
`speex` openSUSE:Leap 15.2	All versions	`1.2-lp152.4.3.1`
`speex` openSUSE:Leap 15.3	All versions	`1.2-3.3.1`
`speex` openSUSE:Tumbleweed	All versions	`1.2-2.1`

Products include Fedoraproject Fedora, Xiph Speex.

How do I fix CVE-2020-23903?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-23903 being exploited?

There is no known exploitation of CVE-2020-23903 in the wild and no public exploit code.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALSA-2022:7979, DEBIAN-CVE-2020-23903, GHSA-r85g-7qgq-6wrq, MGASA-2021-0550, OESA-2022-1701, RHSA-2022:7979 and 9 more.