Improper access control in Red Hat OpenStack 16.1 packages

1) Improper access control

EUVDB-ID: #VU57242

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-40085

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can bypass implemented security restrictions and reconfigure dnsmasq via a crafted extra_dhcp_opts value.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenStack: before 16.1

openstack-neutron (Red Hat package): before 15.2.1-1.20210409073447.el8ost

CPE2.3

• cpe:2.3:a:red_hat:red_hat_openstack:*:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:openstack-neutron_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2021:3481

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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