Local denial of service in OpenStack Nova

1) State Issues

EUVDB-ID: #VU75530

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-37394

CWE-ID: CWE-371 - State Issues

Exploit availability: No

Description

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

The vulnerability exists due to an error, related to port binding. By creating a neutron port with the direct vnic_type, creating an instance bound to that port, and then changing the vnic_type of the bound port to macvtap, an authenticated user may cause the compute service to fail to restart, resulting in a possible denial of service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Openstack Nova: 23.0.0 - 25.0.1

External links

http://bugs.launchpad.net/ossa/+bug/1981813
http://review.opendev.org/c/openstack/nova/+/850003
http://review.opendev.org/c/openstack/nova/+/849985

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.

Is there known malware, which exploits this vulnerability?

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