Denial of service in QEMU

1) Division by zero

EUVDB-ID: #VU85828

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-42467

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a division by zero error within the scsi_disk_reset() function in hw/scsi/scsi-disk.c. A local user can pass specially crafted data to the application and crash it.

Mitigation

Install update from vendor's website.

Vulnerable software versions

QEMU: All versions

CPE2.3

• cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

External links

https://gitlab.com/qemu-project/qemu/-/issues/1813
https://gitlab.com/qemu-project/qemu/-/commit/7cfcc79b0ab800959716738aff9419f53fc68c9c
https://security.netapp.com/advisory/ntap-20231103-0005/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

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

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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