Denial of service in QEMU

1) Division by zero

EUVDB-ID: #VU46316

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14415

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to division by zero error within the oss_write() function in audio/ossaudio.c in QEMU. A remote user can run a specially crafted application to trigger the error and perform a denial if service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QEMU: 4.0.0 - 4.2.1

External links

http://git.qemu.org/?p=qemu.git;a=commit;h=7a4ede0047a8613b0e3b72c9d351038f013dd357
http://usn.ubuntu.com/4467-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.